ccna 2 answers by abhishek kunal

8/8/2019 Ccna 2 Answers by Abhishek Kunal

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CCNA EXPLOARTION 2 ANSWERS BY abhishek kunal

Unit1:

1. If a router cannot find a valid configuration file during the startup sequence, what will occur?

The startup sequence will reset.

The router will prompt the user for a response to enter setup mode.

The startup sequence will halt until a valid configuration file is acquired. The router will generate a default configuration file based on the last valid configuration.

The router will monitor local traffic to determine routing protocol configuration requirements.

2. Refer to the exhibit. The network administrator has configured the router with the interface IP

addresses shown for the directly connected networks. Pings from the router to hosts on the

connected networks or pings between router interfaces are not working. What is the most likely

problem? The destination networks do not exist.

The IP addresses on the router interfaces must be configured as network addresses and not hostaddresses.

The interfaces must be enabled with the no shutdown command.

Each interface must be configured with the clock rate command.

3. Refer to the exhibit. What can be concluded from the routing table output in the exhibit?

(Choose two.)

This router only has two interfaces.

The router interfaces are not operational yet.

This router is configured to forward packets to remote networks. The FastEthernet0/0 and Serial0/0/0 interfaces of this router were configured with an IPaddress and the no shutdown command.

An IP packet received by this router with a destination address of 198.18.9.1 will be forwarded

out of the Serial0/0/0 interface.

4. Refer to the exhibit. The frame shown in the exhibit was received by the router. The router

interfaces are operational. How will the router process this frame? (Choose two.)

The router will change the source and destination IP address in the packet before forwardingthe frame.

The router will change the frame type to one supported by the WAN link before forwarding the

frame. The router will use the destination MAC address to determine which interface to forward thepacket.

The router will look up the MAC address of the S0/0/0 interface in the ARP table and add it to

the frame before forwarding.

The frame was received on the Fa0/0 interface of the router and will be switched to the S0/0/0

interface.


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The frame was received on the S0/0/0 interface of the router and will be switched to the Fa0/0

interface.

5. Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and

interfaces that can be protected with passwords. (Choose three.)

VTY interface console interface

Ethernet interface

secret EXEC mode privileged EXEC mode

router configuration mode

6. Which two statements correctly describe the components of a router? (Choose two.)

RAM permanently stores the configuration file used during the boot sequence.

ROM contains diagnostics executed on hardware modules.

NVRAM stores a backup copy of the IOS used during the boot sequence.

Flash memory does not lose its contents during a reboot. ROM contains the most current and most complete version of the IOS.

Flash contains boot system commands to identify the location of the IOS

7.Refer to the exhibit. After host 2 is connected to the switch on the LAN, host 2 is unable tocommunicate with host 1. What is the cause of this problem?

The subnet mask of host 2 is incorrect.

Host 1 and host 2 are on different networks.

The switch needs an IP address that is not configured.

The router LAN interface and host 1 are on different networks. The IP address of host 1 is on a different network than is the LAN interface of the router.

8. Which are functions of a router? (Choose three.)

packet switching

extension of network segments

segmentation of broadcast domains selection of best path based on logical addressing

election of best path based on physical addressing

9. Refer to the exhibit. All routers have a route in its routing table to each network that is shown

in the exhibit. Default routes have not been issued on these routers. What can be concluded abouthow packets are forwarded in this network? (Choose two.)

If RouterC receives a packet that is destined for 10.5.1.1, it will be forwarded out interface

Fa0/0.

If RouterA receives a packet that is destined for 192.168.3.146, it will be forwarded outinterface S0/0/1.

If RouterB receives a packet that is destined for 10.5.27.15, it will be forwarded out interface

S0/0/1.

If RouterB receives a packet that is destined for 172.20.255.1, it will be forwarded out interface

S0/0/0.


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If RouterC receives a packet that is destined for 192.16.5.101, it will be forwarded out interface

S0/0/1.

10. The serial connection shown in the graphic needs to be configured. Which configuration

commands must be made on the Sydney router to establish connectivity with the Melbourne site?

(Choose three.) Sydney(config-if)# ip address 201.100.53.2 255.255.255.0

Sydney(config-if)# no shutdown

Sydney(config-if)# ip address 201.100.53.1 255.255.255.224

Sydney(config-if)# clock rate 56000

Sydney(config-if)# ip host Melbourne 201.100.53.2

11. Rfer to the exhibit. What can be concluded from the output of the running-configuration of a

router?

The passwords are encrypted.

The current configuration was saved to NVRAM.

The configuration that is shown will be the one used on the next reboot. The commands that are displayed determine the current operation of the router.

12. Refer to the exhibit. Host A pings host B. When R4 accepts the ping into the Ethernet

interface, what two pieces of header information are included? (Choose two.)

source IP address: 192.168.10.129 source IP address: BBBB.3333.5677

destination IP address: 192.168.10.33

destination IP address: 192.168.10.134

destination MAC address: 9999.DADC.1234

13. What is the outcome of entering these commands? R1(config)# line vty 0 4 R1(config-line)# password check123

R1(config-line)# login

ensures that a password is entered before entering user EXEC mode

sets the password to be used for connecting to this router via Telnet

requires check123 to be entered before the configuration can be saved

creates a local user account for logging in to a router or switch

14. Which of the following is the correct flow of routines for a router startup?

load bootstrap, load IOS, apply configuration

load bootstrap, apply configuration, load IOS load IOS, load bootstrap, apply configuration, check hardware

check hardware, apply configuration, load bootstrap, load IOS

15. What three processes does a router execute when it receives a packet from one network thatis destined for another network? (Choose three.)

decapsulates the Layer 3 packet by stripping off the Layer2 frame header

uses the destination MAC Address in the IP Header to look up the next-hop address in the


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routing table

leaves the Layer 2 frame header intact when decapsulating the Layer 3 packet

uses the destination IP Address in the IP header to look up the next-hop address in the routing

table

encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit

interface encapsulates the Layer 3 packet into a special Layer 1 frame and forwards it to the exitinterface

16. The network administrator needs to connect two routers directly via their FastEthernet ports.

What cable should the network administrator use?

straight-through

rollover cross-over

serial

17. Which two statements describe characteristics of load balancing? (Choose two.) Load balancing occurs when a router sends the same packet to different destination networks.Load balancing occurs when a router sends the same packet to different destination networks.

Load balancing allows a router to forward packets over multiple paths to the same destination

network.

Unequal cost load balancing is supported by EIGRP.

If multiple paths with different metrics to a destinations exist, the router cannot support loadbalancing.

18. What information about the router and its startup process can be gathered from the output of

the show version command? (Choose three.)

the last restart method the command buffer contents the amount of NVRAM and FLASH used

the configuration register settings

the location from where the IOS loaded

19. Which interfaces in the exhibit could be used for a leased line WAN connection? (Choosetwo.)

1

2

3

4

5

6

20. From what location can a router load the Cisco IOS during the boot process? (Choose two.)

RAM

TFTP server

NVRAM


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setup routine

Flash memory

terminal

21. A network administrator has just entered new configurations into Router1. Which command

should be executed to save configuration changes to NVRAM? Router1# copy running-config flash

Router1(config)# copy running-config flash

Router1# copy running-config startup-config

Router1(config)# copy running-config startup-config

Router1# copy startup-config running-config

Router1(config)# copy startup-config running-config

22. What is the default sequence for loading the configuration file?

NVRAM, FLASH, ROM

FLASH, TFTP,CONSOLE

NVRAM, TFTP, CONSOLE FLASH, TFTP, ROM

23. What header address information does a router change in the information it receives from an

attached Ethernet interface before information is transmitted out another interface?

only the Layer 2 source address only the Layer 2 destination address

only the Layer 3 source address

only the Layer 3 destination address

the Layer 2 source and destination address

the Layer 3 source and destination address

UNIT 2:

1. A static route that points to the next hop IP will have what administrative distance and metric

in the routing table?

administrative distance of 0 and metric of 0




2. What address can be used to summarize networks 172.16.1.0/24, 172.16.2.0/24, 172.16.3.0/24,

and 172.16.4.0/24?

172.16.0.0/21

172.16.1.0/22

172.16.0.0 255.255.255.248

172.16.0.0 255.255.252.0


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3. The routers in the diagram use the subnet assignments shown. What is the most efficient route

summary that can be configured on Router3 to advertise the internal networks to the cloud?

192.1.1.0/26 and 192.1.1.64/27

192.1.1.128/25 192.1.1.0/23 and 192.1.1.64/23

192.1.1.0/24 192.1.1.0/25

192.1.1.0/24 and 192.1.1.64/24

4. Refer to the exhibit. What is the significance of the /8 in the route to the 10.0.0.0 network?

It indicates that there are 8 hops between this router and the 10.0.0.0 network.

It represents the time, in milliseconds, it takes for a ping to reply when sent to the 10.0.0.0network.

It indicates that there are 8 subnets in the destination network to which the router can forward

packets.

It indicates the number of consecutive bits, from the left, in the destination IP address of a

packet that must match 10.0.0.0 to use that route.

5. Refer to the exhibit. How will packets destined to the 172.16.0.0 network be forwarded?

Router1 will perform recursive lookup and packet will exit S0/0.

Router1 will perform recursive lookup and packet will exit S0/1.

There is no matching interface associated with network 172.16.0.0 so packets will be dropped.

There is no matching interface associated with network 172.16.0.0 so packets will take gatewayof last resort and exit out S0/2.

6. A network administrator enters the following command into Router1: ip route 192.168.0.0

255.255.255.0 S0/1/0. Router1 then receives a packet that is destined for 192.168.0.22/24. After

finding the recently configured static route in the routing table, what does Router1 do next toprocess the packet?

drops the packet because the destination host is not listed in the routing table

looks up the MAC address of the S0/1/0 interface to determine the destination MAC address ofthe new frame

performs a recursive lookup for the IP address of the S0/1/0 interface before forwarding the

packet

encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0

interface

7. Refer to the exhibit. Given the output in the exhibit, how would a clock rate be determined forthis link?

The rate would be negotiated by both routers.

A rate would not be selected due to the DCE/DTE connection mismatch.

The rate configured on the DTE determines the clock rate.

The rate configured on the DCE determines the clock rate.

8. Refer to the exhibit. Which set of commands will configure static routes that will allow the

WinterPark and the Altamonte routers to deliver packets from each LAN and direct all other


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traffic to the Internet?

WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2

Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/1

WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1

Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2Altamonte(config)# ip route 198.18.222.0 255.255.255.255 s0/1


WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2


Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2

Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/0

9. Hosts on two separate subnets cannot communicate. The network administrator suspects amissing route in one of the routing tables. Which three commands can be used to help

troubleshoot Layer 3 connectivity issues? (Choose three.) ping

show arp traceroute show ip route

show interface

show cdp neighbor detail

10. Refer to the exhibit. A company network engineer is assigned to establish connectivitybetween the two Ethernet networks so that hosts on the 10.1.1.0/24 subnet can contact hosts on

the 10.1.2.0/24 subnet. The engineer has been told to use only static routing for these company

routers. Which set of commands will establish connectivity between the two Ethernet networks? R1(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1R2(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2

R1(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.2

R2(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.1

R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1

R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.1

R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.2

R1(config)# ip route 0.0.0.0 0.0.0.0 10.1.2.1R2(config)# ip route 0.0.0.0 0.0.0.0 10.1.1.1

11. Which of the following are displayed by the Router# show cdp neighbors command?

(Choose three.)

load

platform

reliability

holdtime

local interface


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12. Refer to the exhibit. What two commands are required to provide connectivity between the

192.168.1.0 and 10.0.0.0 networks without requiring recursive lookup? (Choose two.)

A(config)# ip route 10.0.0.0 255.0.0.0 s 0/1/0

A(config)# ip route 10.0.0.0 255.0.0.0 172.16.40.2 A (config)# ip route 10.0.0.0 255.0.0.0 s 0/0/0

B(config)# ip route 192.168.1.0 255.255.255.0 s 0/0/0 B (config)# ip route 192.168.1.0 255.255.255.0 172.16.40.1

B(config)# ip route 192.168.1.0 255.255.255.0 s 0/1/0

13. Refer to the exhibit. What two commands will change the next-hop address for the 10.0.0.0/8

network from 172.16.40.2 to 192.168.1.2? (Choose two.)

A(config)# no network 10.0.0.0 255.0.0.0 172.16.40.2

A(config)# no ip address 10.0.0.1 255.0.0.0 172.16.40.2 A(config)# no ip route 10.0.0.0 255.0.0.0 172.16.40.2

A(config)# ip route 10.0.0.0 255.0.0.0 s0/0/0

A(config)# ip route 10.0.0.0 255.0.0.0 192.168.1.2

14. What happens to a static route entry in a routing table when the outgoing interface is notavailable?

The route is removed from the table.

The router polls neighbors for a replacement route.

The route remains in the table because it was defined as static.

The router redirects the static route to compensate for the loss of the next hop device.

15. A router has one static route to each destination network. Which two scenarios would require

an administrator to alter the static routes that are configured on that router? (Choose two.)

The destination network no longer exists.

The destination network is moved to a different interface on the same router. The path between the source and destination is upgraded with a higher bandwidth link.

A topology change occurs where the existing next-hop address or exit interface is not

accessible.

The remote destination network interface has to be down for 15 minutes of maintenance.

16. Why is it advisable to enter a next-hop IP address when creating a static route whose exitinterface is an Ethernet network?

Adding the next-hop address eliminates the need for the router to do any lookups in the routing

table before forwarding a packet.

In a multi-access network, the router cannot determine the next-hop MAC address for theEthernet frame without a next-hop address.

Using a next-hop address in a static route provides a route with a lower metric.

In multi-access networks, using a next-hop address in a static route makes that route acandidate default route.

17. The output of the Router# show interfaces serial 0/1 command displays the following:

Serial0/1 is up, line protocol is down. What is the most likely cause for the line protocol being down?


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Serial0/1 is shutdown.

There is no cable connecting the routers.

The remote router is using serial 0/0.

No clock rate has been set.

18. Refer to the exhibit. Which static route should be configured on Router1 so that host A willbe able to reach host B on the 172.16.0.0 network?

ip route 192.168.0.0 172.16.0.0 255.255.0.0

ip route 172.16.0.0 255.255.0.0 192.168.0.1 ip route 172.16.0.0 255.255.0.0 S0/0/1

ip route 172.16.0.0 255.255.0.0 S0/0/0

19. What two devices are responsible for converting the data from the WAN service provider

into a form acceptable by the router? (Choose two).

the serial port of the router

a modem

a switch the ethernet port of the router

a CSU/DSU device

a DTE device

20. Which of the following is true regarding CDP and the graphic shown?

CDP running on Router D will gather information about routers A, B, C, and E.

By default, Router A will receive CDP advertisements from routers B and C.

If routers D and E are running different routing protocols, they will not exchange CDP

information.

Router E can use CDP to identify the IOS running on Router B.

21. Which two statements describe functions or characteristics of CDP? (Choose two.)

It starts up automatically and allows the device to detect directly connected neighbor devices

that use CDP.

It operates at the network layer and allows two systems to learn about each other. It creates a topology map of the entire network.

It allows systems to learn about each othereven if different network layer protocols areconfigured.

It forwards advertisements about routes for faster convergence.

22. Which piece of information is available from examining the output of the command show ip

interface brief?

Interface speed and duplex

Interface MTU

Errors Interface MAC address

Interface IP address


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UNIT 3:

1. Which two statements correctly describe the concepts of administrative distance and metric?(Choose two.)

Administrative distance refers to the trustworthiness of a particular route.

Routes with the smallest metric to a destination indicate the best path.

2. Refer to the exhibit. Which statement correctly describes how R1 will determine the best pathto R2?

R1 will install an EIGRP route using network B in its routing table because the administrative

distance of EIGRP is lower than RIP.

3. Which two statements are true regarding classless routing protocols? (Choose two.)

sends subnet mask information in routing updates

allows for use of both 192.168.1.0/30 and 192.168.1.16/28 subnets in the same topology

4. Which command would the network administrator issue to determine if load balancing is in

effect on a router?

show ip route

5. Which statement is true regarding routing protocols?

EIGRP uses DUAL to calculate the shortest path and can be configured to do unequal cost load

balancing.

6. Which two conditions would create a setting where the use of a distance-vector routing

protocol would be efficient? (Choose two.) the network is using a hub and spoke topology

the network is using a flat design

7. What is the purpose of a routing protocol?

It allows a router to share information about known networks with other routers.

8. Which of the following best describes the operation of distance vector routing protocols?

hey send their routing tables to directly connected neighbors.

9. Which of the following is associated with link-state routing protocols?

shortest-path first calculations

10. Why is fast convergence desirable in networks that use dynamic routing protocols?

Routers may make incorrect forwarding decisions until the network has converged.

11. Which of the following conditions must be met in order for a network to have converged

The routers in the network are operating with consistent routing knowledge.


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12. Which two statements are true regarding metrics? (Choose two.)

EIGRP uses bandwidth as a metric.

OSPF uses cost based on bandwidth as a metric.

13. Which two statements are true regarding the advantages of the use of static routes? (Choose

two). increased security

the administrator maintains control over routing

14. The following line of code is displayed in a routing table:

R 209.165.201.0/24 [120/2] via 192.168.252.2, 00:00:16, S0/0/0What can be concluded from this output?

The value, 120, is used to determine the best path when a router has more than one routingprotocol configured for the same destination network.

15. What will be the result of the following commands?

ORL(config)# interface fastethernet 0/0ORL(config-if)# ip address 172.16.3.1 255.255.255.0

ORL(config-if)# no shutdown

A routing table entry is made to the 172.16.3.0 network with a code of "C".

16. An engineer creates a static route by entering the Router(config)# ip route 10.0.0.0255.255.255.0 192.168.1.2 command. What can be concluded about this route?

The administrative distance of this route is 1.

17. Refer to the exhibit. Router1 and Router2 are running EIGRP. All interfaces are operational

and packets can be forwarded between all networks. What information will be found in the

routing table for Router1? The administrative distance of the route to network 172.16.0.0 will be 90.

18. The following line of code is present in the routing table:

O 10.16.1.0/27 [110/129] via 192.168.1.5, 00:00:05, Serial0/0/1What does the number 129 indicate in this output?

The cost for this link has a value of 129.

19. A growing medium-sized manufacturing company recently began to have routing instabilityissues. The company uses static routes and has a mixture of over 30 Cisco and non-Cisco routers.

The network administrator has decided to convert the network to dynamic routing. What

characteristics of protocols should be considered in this selection process?

OSPF can be used between the routers.

20. Refer to the exhibit. If RIP is the routing protocol, what is the value of the metric from router

A to network 192.168.5.0/24?

3


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21. A router learns two paths with equal metrics to a destination network via the RIP routing

protocol. How will the router handle packets to the destination network?

The router will install both routes in the routing table and load balance between the two.

UNIT 4:

1. Which event will cause a triggered update? a route is installed in the routing table

2. Three routers running a distance-vector routing protocol lost all power, including the battery

backups. When the routers reload, what will happen?

They will send updates that include only directly connected routes to their directly connected

neighbors.

3. What does the RIP holddown timer do?

instructs routers to ignore updates, for a specified time or event, about possible inaccessible

routes

4. Which two statements are true regarding the function of the RIPv1 routing updates? (Choose

two).

updates are broadcast at regular intervals

broadcasts are sent to 255.255.255.255

5. Which of the following statements are correct about RIP?

will send out an update if there is a failure of a link

6. Which two statements describe EIGRP? (Choose two.)

EIGRP sends triggered updates whenever there is a change in topology that influences the

routing information.

EIGRP sends a partial routing table update, which includes just routes that have been changed.

7. Which statement is true regarding cisco's RIP_JITTER variable? It prevents the synchronization of routing updates by subtracting a random length of time

ranging from 0% to 15% of the specified interval time from the next routing update interval.

8. What actions will occur after RouterA loses connectivity to network 114.125.16.0? (Choose

two.)

RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterA.


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Router C will learn of the loss of connectivity to network 114.125.16.0 from RouterB

9. Which of the following methods does split horizon use to reduce incorrect routing

information?

Information learned from one source is not distributed back to that source.

10. The graphic shows a network that is configured to use RIP routing protocol. Router2 detects

that the link to Router1 has gone down. It then advertises the network for this link with a hop

count metric of 16. Which routing loop prevention mechanism is in effect?

route poisoning

11. What is the purpose of the TTL field in the IP header?

limits the time or hops that a packet can traverse through the network before it should be

discarded

12. Which of the following can exist in a distance vector network that has not converged?

(Choose three.)

routing loops

inconsistent traffic forwarding

inconsistent routing table entries

13. Refer to the exhibit. The routers in this network are running RIP. Router A has not received

an update from Router B in over three minutes. How will Router A respond?

The Invalid timer will mark the route as unusable if an update has not been received in 180

seconds.

14. A network administrator is evaluating RIP versus EIGRP for a new network. The network will

be sensitive to congestion and must respond quickly to topology changes. What are two good

reasons to choose EIGRP instead of RIP in this case? (Choose two.)

EIGRP only updates affected neighbors.

EIGRP updates are partial.

15. Refer to the exhibit. What path will packets from the 192.168.1.0/24 network travel to reach

the 10.0.0.0/8 network if RIP is the active routing protocol?

The path will be router A -> router D -> router E.

16. Which three routing protocols are distance vector routing protocols? (Choose three).

RIPv1

EIGRP

RIPv2

17. What is a routing loop?


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a condition where a packet is constantly transmitted within a series of routers without ever

reaching its intended destination

18. Which two conditions are most likely to cause a routing loop? (Choose two.)

inconsistent routing tables

incorrectly configured static routes

19. What metric does the RIP routing protocol consider to be infinity?

16

20. What does a router running RIP do first with a new route that is received from an

advertisement?

adjusts the metric for the new route to show the added distance for the route

21. Refer to the exhibit. If all routers are using RIP, how many rounds of updates will occur

before all routers know all networks?

3

UNIT 5:

1. Refer to the exhibit. The network that is shown is running RIPv1. The 192.168.10.0/24network was recently added and will only contain end users. What command or set of commands

should be entered on Router1 to prevent RIPv1 updates from being sent to the end user devices

on the new network while still allowing this new network to be advertised to other routers? Router1(config-router)# no network 192.168.10.0

2. The following line was displayed in the output of the show ip route command.

R 192.168.3.0/24 [120/3] via 192.168.2.2, 00:00:30, Serial0/0What is the value of the routing metric?

3

3. Which of the following is considered a limitation of RIP v1?

RIP v1 does not send subnet mask information in its updates.

4. Refer to the exhibit. The Ethernet interface on Router2 goes down and the administratornotices that the route is still in the Router1 routing table. How much longer will Router1 keep the

down network in its routing table before marking it as possibly down?

155 seconds

5. Refer to the exhibit. Router1 is running RIPv1. What command was entered into Router1 to

configure the gateway of last resort?

ip route 0.0.0.0 0.0.0.0 S0/0/1


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6. What are three characteristics of the RIPv1 routing protocol? (Choose three.)

uses hop count as a metric

considers a metric of 16 as infinity

calculates metrics using the Bellman Ford algorithm

7. Which of the following would be the correct command sequence to enable RIP on Router B

for all connected networks?

RouterB(config)# router ripRouterB(config-router)# network 198.16.4.0

RouterB(config-router)# network 210.36.7.0

RouterB(config-router)# network 220.17.29.0

8. What is the default update period in seconds for the RIP routing protocol?

30

9. Refer to the exhibit. What can be concluded from the routing table output of router B? The default-information originate command has been entered on A.

10. Refer to the exhibit. A network consists of multiple routers. What can be verified when the

show ip protocols command is issued on one of the routers in the network?

routing protocol configuration in use for IP on this router

11. Refer to the exhibit. All routers are configured with valid interface addresses in the indicated

networks and are running RIPv1. The network is converged. Which routes are present in the

routing tables?

All routers have all /30 routes. Routers A and E also have some of the /24 routes in theirrouting table.

12. Which two statements are true regarding the characteristics of RIPv1? (Choose two).

It is a distance vector routing protocol.

The data portion of a RIP message is encapsulated into a UDP segment.

13. Which command or set of commands will stop the RIP routing process?

RouterB(config)# no router rip

14. Refer to the exhibit. All routers in the exhibit are running RIP v1. The network administratorissues the show ip route command on router A. What routes would appear in the routing table

output if the network is converged? (Choose two).

R 192.168.2.0/24 [120/1]

R 10.10.1.0/24 [120/2]

15. Which command will display RIP activity as it occurs on a router?

debug ip rip

16. Refer to the output from the show ip route command. What can be concluded from the output


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of this router command?

There are two equal cost paths to network 1.0.0.0.

17. Refer to the exhibit. Router1 and Router2 are running the RIPv1 protocol. The network

administrator configures the command network 10.1.0.0 on Router1. What network will Router1

advertise to Router2? 10.0.0.0/8

18. Refer to the exhibit. Pings between the serial interfaces of the routers are successful. Hosts

on each LAN can ping the Fa0/0 interface of the router to which they are directly connected

through the switch. However, pings between hosts on the 10.1.1.0/24 and 10.1.2.0/24 networksare unsuccessful. What is a likely cause of this problem?

RIP is configured incorrectly on R1.

19. What will happen if an interface IP address is entered for the address portion of the networkcommand in a RIPv1 configuration instead of a network address?

All interfaces in the same classful network as the configured address will be included in theRIPv1 routing process.

20. Refer to the exhibit. All routers that are shown are running the RIP routing protocol. All

unknown IP traffic must be forwarded to the ISP. What router or set of routers are recommended

to have both a default route and the default-information originate command issued to implementthis forwarding policy?

only the gateway router

UNIT 6:

1. What two advantages does CIDR provide to a network? (Choose two.) reduced routing table size

reduced routing update traffic

2. Refer to the exhibit. Which address is a broadcast address for one of the subnets that are

shown in the exhibit?

192.168.4.15/29

3. In the network shown in the graphic, three bits were borrowed from the host portion of a Class

C address. How many valid host addresses will be unused on the three point-to-point linkscombined if VLSM is not used?

84

4. Which of the following are contained in the routing updates of classless routing protocols?

(Choose two.)

32-bit address

Subnet mask

5. Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point


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connection between the two routers. Which subnetwork mask would provide enough addresses

for the point-to-point link with the least number of wasted addresses?

255.255.255.252

6. What does VLSM allow a network administrator to do?

utilize multiple subnet masks in the same IP address space

7. Which three interior routing protocols support VLSM? (Choose three.)

OSPF

RIP v2 EIGRP

8. Which of the following problems does VLSM help to alleviate?

the shortage of IP addresses

9. Refer to the exhibit. A network technician enters the static route in R1 needed to reach

network 10.1.1.0/24. A ping from the S0/0/0 interface on R1 to host B fails. The technicianbegins testing the network and has the following results:

1. pings from R1 to the S0/0/0 interface on R2....successful2. pings from R1 to the Fa0/0 interface on R2....successful

3. pings from host B to hosts on the 10.1.1.0/24 network....successful

4. pings from host B to the Fa0/0 interface on R2....successful

5. pings from R2 to host B....successful.What is the likely cause of the failure of the ping from R1 to host B?

The default gateway on host B is not correctly set.

10. A network administrator is tasked with dividing up a class C network among the QA, Sales,

and Administration departments. The QA department is made up of 10 people, the Sales is made

up of 28 people, and the Administration has 6. Which two subnets masks adequately address the

QA and Sales departments? (Choose two.)

255.255.255.224 for Sales 255.255.255.240 for QA

11. Refer to the exhibit. A network engineer is summarizing the two groups of routes on router

R1 shown in the exhibit. Which summarization will work for all the subnets?

192.168.0.0/21

12. A Class C address has been assigned for use in the network shown in the graphic. Using

VLSM, which bit mask should be used to provide for the number of host addresses required on

Router A, while wasting the fewest addresses?

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13. Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first

address in each subnet. Which IP address would be usable for a host on one of the LANs in thisnetwork?

192.168.2.130/25


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14. Refer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update forthe network 172.16.1.0 to Router B?

24

15. Refer to the exhibit. The number of required host addresses for each subnet in a network islisted in the exhibit. This number includes the host address requirements for all router ports and

hosts on that subnet. After all device and router port address assignments are determined, what

will be the total number of unused host addresses available?

29

16. An additional subnet is required for a new Ethernet link between Router1 and Router2 as

shown in the diagram. Which of the following subnet addresses can be configured in thisnetwork to provide a maximum of 14 useable addresses for this link while wasting the fewest

addresses?

192.1.1.224/28

17. What is a supernet?

a summarization of classful addresses

18. Refer to the exhibit. A network administrator needs to create two subnetworks from

10.0.0.0/8 for a router running RIPv2. The Admin subnet requires 120 hosts and the Sales subnet

requires 58 hosts. The network administrator assigned 10.0.1.128/25 to the Admin subnet. TheSales subnet is given 10.0.1.192/26. What will be the result of this addressing scheme?

The subnets overlap and will be rejected by the router.

19. A router has a summary route to network 192.168.32.0/20 installed in its routing table. What

range of networks are summarized by this route?

192.168.32.0 192.168.47.0/24

20. Refer to the exhibit. The network administrator wants to minimize the number of entries in

Router1s routing table. What should the administrator implement on the network?

CIDR

UNIT 7:

1. A network administrator has been told that the company IP address infrastructure must adhereto RFC 1918. What three IP address ranges from RFC 1918 could the administrator use on the

network? (Choose three.) 10.0.0.0/8

172.16.0.0/12

192.168.0.0/16

2. Refer to the exhibit. Routers East and West are configured using RIPv1. Both routers are

sending updates about their directly connected routes. The East router can ping the West router


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serial interface and West can ping the serial interface of East. However, neither router has

dynamically learned routes from the other. What is most likely the problem?

VLSM is not supported by RIPv1.

3. Refer to the exhibit. What effect will the commands that are shown have on RIP updates for

Router1?

Only version 2 updates are sent to 224.0.0.9.

4. Refer to the exhibit. What can be concluded from the output shown in the exhibit?

The no auto-summary has not been configured on this router.

5. What are two reasons to implement RIP version 2 rather than RIP version 1? (Choose two.)

RIP version 2 supports VLSM.

RIP version 2 supports routing update authentication.

6. Refer to the exhibit. RIPv1 is configured as the routing protocol for the network that is shown.

The following commands are used on each router:

router rip

network 10.0.0.0

network 172.16.0.0

7. A network administrator installed four new routers that are running RIPv2. Router1 is a

boundary router in the RIPv2 network and has a default route configured. Once the network has

converged, the network administrator enters Router1(config-router)# default-information

originate on Router1. How will this affect the network?

propagates the default route to all routers in the network

8. Refer to the exhibit. A technician needs to add a new loopback interface to test routing

functionality and network design. The technician enters the following set of commands on the

router:

Sanford(config)# interface loopback1

Sanford(config-if)# ip address 192.168.6.62 255.255.255.252

The network address for Loopback1 overlaps with an already configured interface address.

9. What is the maximum network diameter permitted by the default metric of RIPv2?

15 hops

|

10. What are two functions of the network command used when configuring routing protocols?

(Choose two.)

identifies which networks will be included in the routing updates

determines which interfaces can send and receive routing updates


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11. Refer to the exhibit. All routers are running RIPv1. What changes will occur in the routing

table of router B if a loopback interface with an address of 10.16.1.129/27 is configured on

router B?

A connected route to the 10.16.1.128/27 network is added.

12. Refer to the exhibit. If all routers are running RIP version 2, why is there no route for the

192.168.1.32/27 network?

Rip version 2 will auto summarize routes by default.

13. RIPv2 is the configured routing protocol on the routers in a network. The command

Router(config-router)# no version 2 is entered on the routers. What effect does entering this

command have on routing updates?

Version 1 and 2 updates will be received and the version 2 updates will not be sent.

14. How are RIP v1 and RIP v2 similar to one another? (Choose three.)

They both use hop count as a metric.

They both have the same metric value for infinite distance.

They both use split horizon to prevent routing loops.

15. Refer to the exhibit. The exhibited network contains a mixture of Cisco and non-Cisco

routers. The command debug ip rip was entered on the JAX router. All routers are running the

same version of RIP. Router CHI and Router ORL are not able to reach the 192.168.1.16/28

network. What is a possible solution to this problem?

Configure RIPv2 on routers.

16. What field was added to the RIP message header by RFC 1723 to add support for VLSM and

CIDR?

Subnet mask

17. Refer to the exhibit. Which command on which router will allow Router1 to learn about the

192.168.0.0/20 network?

Router2(config-router)# version 2

18. Refer to the exhibit. Which two statements are true? (Choose two.)

Router1 will install a route to 192.168.0.0/20

Router2 will not install a route to 192.168.16.0/20

19. Refer to the exhibit. All routers are running RIP version 2. JAX is configured to just advertise

the 10.0.0.0/24 network. CHI is configured to advertise the 172.16.0.0/16 network. A network

administrator enters the commands shown in the exhibit. What changes will occur in this

network?

The CHI router will install a route to the 192.168.0.0/16 network in its routing table.


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20. Refer to the exhibit. Which command will allow Router2 to learn about the 192.168.16.0/28

network?

Router1(config-router)# network 192.168.16.0

21. When this configuration is complete, users on the LAN of each router are unable to access

the remote LANs. Why?

RIPv1 is unable to route to discontiguous subnets of a major network.

UNIT 8:

1. Refer to the exhibit. What can be determined from this output? The router will have to perform recursive lookups to forward a packet destined for

192.168.2.213/24.

The parent route for these networks was removed from the routing table.

A route to 192.168.0.0/25 would be classified as a supernet route for the routes listed in therouting table.

All of the routes listed are network routes.

2. Refer to the exhibit. A packet destined for host 128.107.0.5/16 is processed by the JAX router.

After finding the static route in the routing table that matches the destination network for this

packet, what does the router do next?

searches for a default route to forward the packet

drops the packet since the static route does not have an exit interface

performs a recursive lookup to find the exit interface used to forward the packet

sends a request to neighboring routers for the location of the 128.107.0.0 network

3. Refer to the exhibit. What parent network will automatically be included in the routing table

when the three subnets are configured on Router1?

172.16.0.0/16

172.16.0.0/24

172.16.0.0/30

172.16.1.0/16

4. The following entry is displayed in the routing table:

R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1

What type of route is this?

a level 1 parent route

a level 1 supernet route

a level 1 ultimate network route

a level 2 child route

a level 2 ultimate child route


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5. Refer to the exhibit. Router1 is running IOS version 12.2. What will the network administrator

need to do so that packets for unknown child routes of 172.16.0.0/24 will not be dropped?

issue the ip default-network command

use a classful routing protocol such as RIPv1

enable either OSPF or ISIS as the routing protocol

issue the ip classless command

do nothing, ip classless is on by default

6. Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97.

What will router B do?

drop the packet

forward the packet via the route to 10.16.1.0

forward the packet via the route to 10.16.1.64

use the default route

7. Refer to the exhibit. How many routes in this output qualify for use as ultimate routes?

3

4

5

6

7

8

8. Refer to the exhibit. With the ip classless command issued, what will router R2 do with a

packet destined for host 172.16.4.234?

drop the packet

send packet out Serial 0/0/1

send packet to network 0.0.0.0

send packet out FastEthernet 0/0

9. Refer to the exhibit. Which statement correctly describes this network?

EIGRP is being used

There is at least one parent and one child route

192.168.2.0, 192.168.3.0, and 192.168.4.0 networks are child routes

Traffic going to 172.16.3.0 will be directed to s 0/0/1

10. Refer to the exhibit. Router1 has been issued the ip classless command. What happens to

packets destined to host 172.16.3.10?

they are dropped

sent to default gateway

forward out interface Serial0/0/1


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forward out interface FastEthernet 0/0

11. Refer to the exhibit. The network administrator has discovered that packets destined for

servers on the 172.16.254.0 network are being dropped by Router2. What command should the

administrator issue to ensure that these packets are sent out the gateway of last resort, Serial

0/0/1?

ip classless

A router has the following entries in its routing table:

S 192.168.0.0/24 [1/0] via 192.168.128.2

O 192.168.0.0/25 [110/2175] via 172.16.1.1, 00:02:15, FastEthernet0/1

D 192.168.0.0/25 [90/22455] via 172.16.2.2, 00:12:15, Serial0/0/0

R 192.168.0.0/26 [120/2] via 172.16.3.3, 00:00:15, Serial0/0/1

12. The router receives a packet that is destined for a host with the address 192.168.0.58. Which

route would this router use to forward the packet?

router use to forward the packet?

the static route

the OSPF route

the EIGRP route

the RIP route

13.What determines if the router implements a classless route lookup process?

Child routes are present in the routing table.

A classless routing protocol has been configured on the router.

The command ip classless is enabled on the router.

Multiple routes with different masks to the same destination are in the routing table.

Routing table entries have a next-hop IP address and an exit interface for each child route.

14. What occurs when no ip classless is implemented on the router?

The router will only support classful IP addressing.

The router will only support classful routing protocols.

The router will use a default route, if present, when a matching route is not found in the

routing table.

The router will assume it has knowledge of all subnets in the network and will not search

beyond child

routes for a better match.

15. Refer to the exhibit. The graphic contains partial contents of the routing table on router E.

Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router

E receives a packet to forward. Which route in the routing table will be searched first and why?

172.16.1.0/25 because it is the first ultimate route

0.0.0.0/0 because it is the lowest network number


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172.16.0.0/25 because it is the first level 1 route

172.18.0.0/15 because it has the shortest mask

16. A network is converged and the routing tables are complete. When a packet needs to be

forwarded, what is the first criterion used to determine the best path in the routing table?

the route with the smallest AD

the route with the longest address and mask match to the destination

the route with the highest bandwidth

the route with the best combination of AD and lowest cost

17. Refer to the exhibit. What subnet mask will Router1 apply to child routes of the

172.16.0.0/24 network?

0.0.0.0

255.255.0.0

255.255.255.0

255.255.255.255

18. Refer to the exhibit. What protocol was used to distribute the routing information for the

network 172.16.1.4?

RIPv1

RIPv2

EIGRP

OSPF

19. A route to a destination network is learned from multiple routing protocols. What is used by

a Cisco router to select the preferred route to the destination that will be installed in the routing

table?

metric

route prefix

update timer

administrative distance

UNIT 9:

1. What two actions will the EIGRP DUAL FSM take if a link to a network goes down? (Choosetwo.)

put the route into passive mode

query neighbors for a new route

search routing table for a feasible successor run the SPF algorithm to find a new successor

search topology table for a feasible successor


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2. Host 192.168.1.66 in the network illustrated is unable to ping host 192.168.1.130. How must

EIGRP be configured toenable connectivity between the two hosts? (Choose two.)

R1(config-router)# network 192.168.1.128

R1(config-router)# auto-summary

R1(config-router)# no auto-summary R2(config-router)# no auto-summary

R2(config-router)# auto-summary

R2(config-router)# network 192.168.1.64

3. Refer to the exhibit. The company is using EIGRP with an autonomous system number of 10.

Pings between

hosts on networks that are connected to router A and those that are connected to router B aresuccessful.

However, users on the 192.168.3.0 network are unable to reach users on the 192.168.1.32

network. What is the

most likely cause of this problem? IP classless is enabled and is causing the packet to drop.

The command network 192.168.1.32 was not issued on router C.

The routers are not configured in the same EIGRP routing domain.

Automatic summarization of the networks is causing the subnetted routes to be dropped.

4. What information is maintained in the EIGRP topology database for a destination route?(Choose three.)

the routing protocol

the feasible distance of the route

the highest cost of the route

the SRTT value for the route the route cost as advertised by the neighboring router

the physical address of the gateway interface

5. On a router running EIGRP, what database would maintain a list of feasible successors?

routing table

neighbor table topology table

adjacency table

6. Refer to the exhibit. What is indicated by the P at the beginning of the topology entry?

the route is in a stable state

the route is a preferred route

DUAL is searching for a better route to this destination

the exit interface is in passive mode and EIGRP advertisements are blocked

7. In the command router eigrp 20, what is the purpose of the number 20?

specifies the administrative distance for all EIGRP routes

identifies the autonomous system number this EIGRP process will advertise


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determines what metric is added to all advertised routes

indicates the number of addresses in the EIGRP routing domain

8. Refer to the exhibit. In the topology table, what do the numbers 3011840 and 3128695

represent?

the route metric that is applied to those EIGRP routes for this router the trustworthiness of the routing information source the composite of the hop count and bandwidth to that destination network

the total metric for that network as advertised by the EIGRP neighbor

9. Which two statements describe characteristics of EIGRP? (Choose two.)

EIGRP is a distance vector routing protocol.

EIGRP supports classless routing and VLSM.

EIGRP is classified as a link-state routing protocol.

EIGRP uses TCP for reliable delivery of EIGRP update packets.

With EIGRP, loop-free paths are achieved through the use of hold-down timers.

EIGRP sends a periodic update every 30 minutes.

10. Refer to the exhibit. Network 192.168.0.0/28 goes down. What type of packet does Router2immediately send

to Router1 and Router3?

a query for network 192.168.0.0/28

an acknowledgment packet to 224.0.0.9

an update packet that is sent to 255.255.255.255

a packet that contains the new routing table for R2

unicast update packets to 192.168.1.1 and 192.168.2.1

11. Refer to the exhibit. Network 192.168.0.0/28 goes down. What type of packet does Router2

immediately send

to Router1 and Router3?

a query for network 192.168.0.0/28 an acknowledgment packet to 224.0.0.9

an update packet that is sent to 255.255.255.255

a packet that contains the new routing table for R2 unicast update packets to 192.168.1.1 and 192.168.2.1

12. What administrative distance would a router assign to a default route in EIGRP that islearned from a source

external to the autonomous system?

1

5

70 90

170

190


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13. In which of the following tables does the EIGRP DUAL algorithm store the primary route to

a destination?(Choose two.)

routing topology

neighbor path shortest path

14. Which of the following types of routes will be denoted by EX in EIGRP routing table

entries? (Choose two.)

routes learned from other routing protocols

routes learned from any non-adjacent EIGRP routers

any route with a hop count metric higher than 224 EIGRP routes that originate in different autonomous systems

all passive routes in the routing table

15. Which term defines a collection of networks under the administrative control of a single

entity that presents acommon routing policy to the Internet?

autonomous system

contiguous networks

process ID

BGP

16. Refer to the exhibit. EIGRP is the only routing protocol enabled on this network. No staticroutes are c

on this router. What can be concluded about network 198.18.1.0/24 from the exhibited output?

A route to network 198.18.1.0/24 is not listed in the routing table.

Packets that are destined for 198.18.1.0/24 will be forwarded to 198.18.10.6.

EIGRP will perform equal cost load balancing across two paths when forwarding packets to198.18

17. The router with interface 172.16.3.2 is a successor for network 198.18.1.0/24.

Refer to the exhibit. All interfaces have been configured with the bandwidths that are shown in

the example

Assuming that all routers are using a default configuration of EIGRP as their routing protocol,what

packets take from the 172.16.1.0/16 network to the 192.168.200.0/24 network?

A,B,E

A,C,E

A,D,E Packets will load balance across the A,B,E and A,C,E paths.

Packets will load balance across the A,B,E and A,D,E paths.

Packets will load balance across the A,C,E and A,D,E paths.


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18. By default, which two metrics are used by EIGRP to determine the best path between

networks?

MTU

load delay

bandwidth reliability

19. Which of the following statements describes the bounded updates used by EIGRP?Bounded updates are sent to all routers within an autonomous system.

Partial updates are sent only to routers that need the information.

The updates are sent to all routers in the routing table.

Updates are bounded by the routers in the topology table.

20. The show ip eigrp topology command output on a router displays a successor route and a

feasible successor

route to network 192.168.1.0/24. In order to reduce processor utilization, what does EIGRP dowhen the

primary route to this network fails?

The router sends query packets to all EIGRP neighbors fora better route to network

192.168.1.0/24.

The DUAL FSM immediately recomputes the algorithm to calculate the next backup route.

Packets that are destined for network 192.168.1.0/24 are sent out the default gateway instead.

The backup route to network 192.168.1.0/24 is installed in the routing table.

21. Refer to the exhibit. Based on the output of show ip eigrp neighbors, what are two possibleproblems with

adjacencies between Router1 and Router2? (Choose two.)

The routers are configured with different EIGRP process IDs.

Automatic summarization was disabled.

The hello timer for R1 was altered. The serial interfaces for both routers are in different networks.

No feasible successors were found.

22. Refer to the exhibit. This is the debug output from 2 directly connected EIGRP routers. They

are not

forming an adjacency. What is the cause?

one router is a non-cisco router

they have different autonomous-system numbers

they are using difference sequence numbers

they are sending incorrect hello types

23. Refer to the exhibit. Which command will advertise the 192.168.1.64/30 network but not the

192.168.1.32network on router A?

network 192.168.1.0


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network 192.168.1.0 255.255.255.0

network 192.168.1.64 0.0.0.3

network 192.168.1.64 0.0.0.7

network 192.168.1.64 0.0.0.255

UNIT 10:

1. Refer to the exhibit. When Router D is configured to use a link-state routing protocol andis added to the network, what is the first thing that it does to begin learning the networktopology?

It learns about its directly connected networks when its interfaces reach the up state.

2. What two events will cause a link state router to send LSPs to all neighbors? (Choosetwo.)

whenever the network topology changes upon initial startup of router or routing protocol

3. What is the final step in the link state routing process?

SPF computes best path to each destination network

4. What two statements correctly describe the link state routing process? (Choose two.)

each router in the area floods LSPs to all neighborsall routers in the area have identical

link state databases.

5. Refer to the exhibit. What kind of information would be seen in an LSP sent from

router JAX to router ATL?

cost of the link

6. What feature do modern link-state protocols provide to minimize processing and

memory requirements?

splitting routing topologies into smaller areas

7. To achieve network convergence, what three steps does each link state router take?

(Choose three.)

build a Link State Packet (LSP) containing the state of each directly connected link.

flood the LSP to all neighbors, who then store all LSPs received in a database. construct a complete map of the topology and compute the best path to each destination

network.

8. What speeds up convergence in a network using link-state routing?

updates triggered by network changes

9. Why is it difficult for routing loops to occur in networks that use link-state routing?

Each router builds a complete and synchronized view of the network.

10. What are some of the advantages of using a link-state routing protocol instead of a


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distance vector routing protocol? (Choose two.)

Routers have direct knowledge of all links in the network and how they are connected.

After the inital LSA flooding, they generally require less bandwidth to communicate

changes in a topology.

11. Which algorithm is run by link-state routing protocols to calculate the shortest path todestination networks?

Dijkstra

12. Refer to the exhibit. Which statement correctly describes the path traffic would take

from the 10.0.0.0/24 network to the 192.168.1.0/24 network if a link-state routing

protocol was in use?

BOS -> ORL -> JAX -> ATL because this path is the lowest cost

13. Which database or table must be identical on all link-state routers within an area in

order to construct an accurate SPF tree?

link-state database

14. Which two routing protocols use Dijkstras shortest path first algorithm? (Choosetwo.)

IS-IS

OSPF

15. When are link-state packets sent to neighbors?

when a link goes up or down

16. Refer to the exhibit. What does JAX do with link-state packets from ORL?

sends out the individual link-state packets out the interface connected to BOS

17. A new network administrator is given the task of selecting an appropriate dynamicrouting protocol for a software development company. The company has over 100

routers, uses CIDR and VLSM, requires fast convergence, and uses both Cisco and non-

Cisco equipment. Which routing protocol is appropriate for this company?

OSPF

18. What action does a link-state router take immediately upon receipt of an LSP from a

neighboring router?

floods the LSP to neighbors

19. Refer to the exhibit. If all routers and interfaces are configured to use a link-staterouting protocol, from which routers will router D receive hello packets?

B and C

UNIT 11:


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1. Refer to the exhibit. What does the "O*E2" from the "O*E2 0.0.0.0/0 [110/1] via192.168.1.1, 00:05:34, Serial0/0" line represent?

an external OSPF route that will not increment in cost.

2. Refer to the exhibit. What is the cost of the route to the 10.0.0.0 network?

1786

3. What three parameters must be indentical between OSPF routers in order to form an

adjacency? (Choose three.)

area id

hello interval

network type

4. What does OSPF use to reduce the number of exchanges of routing information in

networks where large numbers of neighbors are present? (Choose two.)

designated router

backup designated router

5. What does OSPF use to calculate the cost to a destination network?

bandwidth

6. A fully converged five router OSPF network has been running successfully for several

weeks. All configurations have been saved and no static routes are used. If one routerlooses power and reboots, what information will be in its routing table after the

configuration file is loaded but before OSPF has converged?

Routes for connected networks that are operational will be in the routing table.

7. Refer to the exhibit. Router A is correctly configured for OSPF. Which OSPF

configuration statement or set of statements was entered for router B to generate the

exhibited routing table?

B(config-router)# network 192.168.1.0 0.0.0.3 area 0

8. Refer to the exhibit. Which network command or set of sommands will cause OSPF tobe enabled to send and receive packets for any R1 interface in the exhibited subnets?

R1(config-router)# network 0.0.0.0 255.255.255.255 area 0

9. Refer to the exhibit. What does the "2" stand for in the router ospf 2 statement?

The number 2 identifies this particular instance of OSPF on this router.

10. Refer to the exhibit. All routers have been configured with the interface priorities thatare shown. All routers were restarted simultaneously. The results of the DR/BDR election

are shown. What can be concluded about this network?

The highest router ID was most likely determined via an OSPF router-id statement or

statements.

11. Refer to the exhibit. What configuration statements would give the results that are


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shown in the output of the show ip protocols command?

B(config)# router ospf 1B(config-router)# router-id 192.168.1.5

12. Refer to the exhibit. How many OSPF adjacencies must be formed to build the

complete topology if a DR or BDR were not elected in this OSPF network?

6

13. What is the default administrative distance for OSPF?

110

14. Refer to the exhibit. Routers A, B, C, and D are all running OSPF with default router

IDs and OSPF interface priorities. Loopback interfaces are not configured and all

interfaces are operational. Router D is the DR and router C is the BDR. What happensimmediately after the following commands are entered on router A?

A(config)# interface fa0/0

A(config-if)# ip ospf priority 255

D will remain the DR. C will remain the BDR.

15. Refer to the exhibit. All routers are running OSPF. What cost would JAX put in itsrouting table for the 10.0.0.0/24 network?

1787

16. What range of networks will be advertised in the OSPF updates by the commandRouter1(config-router)# network 192.168.0.0 0.0.15.255 area 100?

192.168.0.0/24 through 192.168.15.0/24

17. Refer to the exhibit. The network administrator wants to set the router ID of Router1

to 192.168.100.1. What steps must the administrator take to accomplish this?

nothing, the router-id of Router1 is already 192.168.100.1

18. Refer to the exhibit. When OSPF is operational in the exhibited network, what

neighbor relationship is developed between Router1 and Router2?

A FULL adjacency is formed.

19. Refer to the exhibit. Assuming that the routers have default interface OSPF priorities

and no configured loopback interfaces, what two roles will router B play on each network

segment? (Choose two.)

DR for network 192.168.1.200 BDRfor network 192.168.1.204

20. Refer to the exhibit. Router1 and Router2 are running OSPF. The show ip ospf

neighbor command reveals no neighbors. What is a possible cause?

OSPF hello or dead timers do not match

21. Refer to the exhibit. Which command sequence on RouterB will redistribute a

gateway of last resort to the other routers in OSPF area 0?


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RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6

RouterB(config)# router ospf 10RouterB(config-router)# default-information originate

22. Refer to the exhibit. RouterA, RouterB, and RouterC in the diagram are running

OSPF on their Ethernet interfaces. Router D was just added to the network. Routers areconfigured with the loopback interfaces (Lo 0) that are shown in the exhibit. What

happens to the OSPF DR/BDR after RouterD is added to the network?

There is no change in the DR or BDR until either current DR or BDR goes down.

23. Which two statements describe the use of OSPF DR/BDR elections? (Choose two.)

Elections are required in broadcast multiaccess networks.

Elections are required in non-broadcast multiaccess networks.

24. Refer to the exhibit. The routers in the exhibit are using default OSPF configuration

settings to advertise all attached networks. If all of the routers start at the same time, what

will be the result of the DR and BDR elections for this single area OSPF network?(Choose three.)

Router A will be DR for 10.4.0.0/16.

HQ will be BDR for 10.4.0.0/16.

Remote will be DR for 10.5.0.0/16.

25. Refer to the exhibit. What must be received between neighbors to prevent the deadtime that is shown in the exhibit from reaching zero?

hello packets

.ABHISHEK KUNAL([email protected])

NO FIGURE HAS BEEN GIVEN IN THE ANSWERS.
mailto:[email protected]:[email protected]:[email protected]:[email protected]

ccna 2 answers by abhishek kunal

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