ccna 4 final aaa

8/7/2019 ccna 4 final aaa

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1.

Refer to the exhibit. What is the meaning of the term dynamic in the output of the command?

The bandwidth capability of the interface increases and decreases automatically based on

BECNs.

The Serial0/0/1 interface acquired 172.16.3.1 from a DHCP server.

The mapping between DLCI 100 and 172.16.3.1 was learned through Inverse ARP.

DLCI 100 will automatically adapt to changes in the Frame Relay cloud.

2.

Refer to the exhibit. What can be concluded from the exhibited output of the debug ip natcommand?

The 10.1.1.225 host is exchanging packets with the 192.168.0.10 host.

The native 10.1.200.254 address is being translated to 192.168.0.10.

The 192.168.0.0/24 network is the inside network.

Port address translation is in effect.

3. Which data link layer encapsulation protocol is used by default for serial connections

between two Cisco routers?

ATM

Frame Relay

HDLC

PPP

SDLC

4. Which technology is used to dynamically map next hop, network layer addresses to virtualcircuits in a Frame Relay network?


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Inverse ARP

LMI

DLCI

FECN

5.

Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. Host

A has sent a packet to the web server. What is the destination IP address of the return packet

from the web server?

10.1.1.2:1234

172.30.20.1:1234

172.30.20.1:3333

192.168.1.2:80

6. A network technician analyzes the network and notices late collisions. The collisions occur

accompanied by jabber that originates from the server. What is the likely cause of the

problem?

faulty switch port

web server CPU overload

faulty NIC in the web server

misconfiguration of web server services

7. What is the result of adding the global command service password-encryption to the

configuration of a router?

Line passwords are encrypted with type 7 encryption.

Enable passwords are encrypted with type 5 encryption.


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All services must provide an encrypted password to function.

Only encrypted messages are allowed for router communication.

8. Which three physical network problems should be checked when a bottom-up

troubleshooting approach has been chosen to troubleshoot network performance? (Choose

three.)

cable connectivity

high collision counts

STP failures and loops

address mapping errors

high CPU utilization rates

excess packets that are filtered by the firewall

9.

Refer to the exhibit. A network administrator is trying to connect R1 remotely to make

configuration changes. Based on the exhibited command output, what will be the result when

attempting to connect to R1?

failure to connect due to Telnet not being enabled

failure to connect due to incomplete configuration for Telnet

a successful connection and ability to make configuration changes

a successful connection but inability to make configuration changes because of the absence ofan enable secret password

10.

Refer to the exhibit. Which data transmission technology is being represented?

TDM

PPP


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HDLC

SLIP

11. A company is looking for a WAN solution to connect its headquarters site to four remote

sites. What are two advantages that dedicated leased lines provide compared to a shared

Frame Relay solution? (Choose two.)

reduced jitter

reduced costs

reduced latency

the ability to burst above guaranteed bandwidth

the ability to borrow unused bandwidth from the leased lines of other customers

12. Which type of ACL will permit traffic inbound into a private network only if an outbound

session has already been established between the source and destination?

extended

reflexive

standard

time-based

13. An issue of response time has recently arisen on an application server. The new release ofa software package has also been installed on the server. The configuration of the network has

changed recently. To identify the problem, individuals from both teams responsible for the

recent changes begin to investigate the source of the problem. Which statement applies to this

situation?

Scheduling will be easy if the network and software teams work independently.

It will be difficult to isolate the problem if two teams are implementing changes

independently.

Results from changes will be easier to reconcile and document if each team works inisolation.


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Only results from the software package should be tested as the network is designed to

accommodate the proposed software platform.

14.

Refer to the exhibit. The corporate network that is shown has been assigned network

172.16.128.0/19 for use at branch office LANs. If VLSM is used, what mask should be used

for addressing hosts at Branch4 with minimal waste from unused addresses?

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15. Which IEEE 802.16 broadband wireless technology allows users to connect to the ISP at

speeds comparable to DSL and cable?

Wi-Fi

satellite

WiMAX

Metro Ethernet

16.

Refer to the exhibit. Based on the output as shown, which two statements correctly define

how the router will treat Telnet traffic that comes into interface FastEthernet 0/1? (Choose

two).

Telnet to 172.16.10.0/24 is denied.


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Telnet to 172.16.20.0/24 is denied.

Telnet to 172.16.0.0/24 is permitted.



17. What is tunneling?

using digital certificates to ensure that data endpoints are authentic

creating a hash to ensure the integrity of data as it traverses a network

using alternate paths to avoid access control lists and bypass security measures

encapsulating an entire packet within another packet for transmission over a network

18. What functionality do access control lists provide in the implementation of dynamic NAT

on a Cisco router?

define which addresses can be translated

define which addresses are assigned to a NAT pool

define which addresses are allowed out the router

define which addresses can be accessed from the inside network

19.

Refer to the exhibit. All devices are configured as shown in the exhibit. PC1 is unable to pingthe default gateway. What is the cause of the problem?

The default gateway is in the wrong subnet.

STP has blocked the port that PC1 is connected to.

Port Fa0/2 on S2 is assigned to the wrong VLAN.

S2 has the wrong IP address assigned to the VLAN30 interface.


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20.

Refer to the exhibit. RIPv2 has been configured on all routers in the network. Routers R1 and

R3 have not received any RIP routing updates. What will fix the issue?

Enable RIP authentication on R2.

Issue the ip directed-broadcast command on R2.

Change the subnet masks to 10.11.12.0/8 and 172.16.40.0/16 on R2.

Enable CDP on R2 so that the other routers will receive routing updates.

21. Which two statements are true about IPv6 link local addresses? (Choose two.)

They begin with the 2000::/3 prefix.

They begin with the FE80::/10 prefix.

They are assigned by IANA to an organization.

They must be manually configured by the administrator.

They are assigned to a host by a stateless autoconfiguration process.

22. An administrator learns of an e-mail that has been received by a number of users in the

company. This e-mail appears to come from the office of the administrator. The e-mail asks

the users to confirm their account and password information. Which type of security threat

does this e-mail represent?

cracking

phishing

phreaking

spamming

23. Which statement is true about NCP?

Link termination is the responsibility of NCP.

Each network protocol has a corresponding NCP.


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NCP establishes the initial link between PPP devices.

NCP tests the link to ensure that the link quality is sufficient.

24. Where does a service provider assume responsibility from a customer for a WAN

connection?

local loop

DTE cable on router

demarcation point

demilitarized zone

25.

Refer to the exhibit. This serial interface is not functioning correctly. Based on the output

shown, what is the most likely cause?

improper LMI type

interface reset

PPP negotiation failure

unplugged cable

26.

Refer to the exhibit. Which statement correctly describes how Router1 processes an FTPrequest that enters interface s0/0/0 and is destined for an FTP server at IP address

192.168.1.5?

The router matches the incoming packet to the statement that was created by the access-list

201 deny icmp 192.168.1.0 0.0.0.255 any command, continues comparing the packet to the

remaining statements in ACL 201 to ensure that no subsequent statements allow FTP, and

then the router drops the packet.

The router reaches the end of ACL 101 without matching a condition and drops the packet

because there is no statement that was created by the access-list 101 permit ip any any

command.


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The router matches the incoming packet to the statement that was created by the access-list

101 permit ip any 192.168.1.0 0.0.0.255 command and allows the packet into the router.

It matches the incoming packet to the statement that was created by the access-list 201 permit

ip any any command and allows the packet into the router.

27.

Refer to the exhibit. Every time the administrator reboots this router, the boot process ends in

setup mode. What is a possible problem?

There is insufficient RAM for the IOS to load on this router.

A password recovery process should be done on this router.

The bootstrap version and the version of the IOS are different.

The IOS image is damaged and must be reloaded using tftpdnld.

The configuration register is set to ignore the startup configuration.

28. Compared with IDS systems, what can IPS systems do to provide further protection of

computer systems?

detect potential attacks

stop the detected attack from executing

update OS patches for computer systems

scan computer systems for viruses and spyware

29. Which IP address and wildcard mask would be used in an ACL to block traffic from all

hosts on the same subnet as host 192.168.16.43/28?

access-list 10 deny 192.168.16.0 0.0.0.31

access-list 10 deny 192.168.16.16 0.0.0.31

access-list 10 deny 192.168.16.32 0.0.0.16

access-list 10 deny 192.168.16.32 0.0.0.15


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access-list 10 deny 192.168.16.43 0.0.0.16

30.

Refer to the exhibit. Partial results of the show access-lists and show ip interface FastEthernet0/1 commands for router Router1 are shown. There are no other ACLs in effect. Host A is

unable to telnet to host B. Which action will correct the problem but still restrict other traffic

between the two networks?

Apply the ACL in the inbound direction.

Apply the ACL on the FastEthernet 0/0 interface.

Reverse the order of the TCP protocol statements in the ACL.

Modify the second entry in the list to permit tcp host 172.16.10.10 any eq telnet .

31. A network administrator has changed the VLAN configurations on his network switches

over the past weekend. How can the administrator determine if the additions and changes

improved performance and availability on the company intranet?

Conduct a performance test and compare with the baseline that was established previously.

Interview departmental secretaries and determine if they think load time for web pages has

improved.

Determine performance on the intranet by monitoring load times of company web pages from

remote sites.

Compare the hit counts on the company web server for the current week to the values that

were recorded in previous weeks.

32.Refer to the exhibit. A network administrator is creating a prototype to verify the new WAN

design. However, the communication between the two routers cannot be established. Based on

the output of the commands, what can be done to solve the problem?

Replace the serial cable .

Replace the WIC on RA.

Configure RA with a clock rate command.

Issue a no shutdown interface command on RB.


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33. A network administrator is tasked with maintaining two remote locations in the same city.

Both locations use the same service provider and have the same service plan for DSL service.

When comparing download rates, it is noticed that the location on the East side of town has afaster download rate than the location on the West side of town. How can this be explained?

The West side has a high volume of POTS traffic.

The West side of town is downloading larger packets.

The service provider is closer to the location on the East side.

More clients share a connection to the DSLAM on the West side.

34. What are two effective measures for securing routers? (Choose two.)

Protect all active router interfaces by configuring them as passive interfaces.

Configure remote administration through VTY lines for Telnet access.

Use quotes or phrases to create pass phrases.

Disable the HTTP server service.

Enable SNMP traps.

35. Which combination of Layer 2 protocol and authentication should be used to establish a

link without sending authentication information in plain text between a Cisco and a non-Cisco

router?

PPP with PAP

PPP with CHAP

HDLC with PAP

HDLC with CHAP

36. While troubleshooting a problem with an e-mail server, an administrator observes that the

switch port used by the server shows "up, line protocol up". The administrator cannot ping the

server. At which layer of the OSI model is the problem most likely to be found?


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application layer

network layer

data link layer

physical layer

37.

Refer to the exhibit. From the output of the show interfaces and ping commands, at which

layer of the OSI model is a fault indicated?

application

transport

network

data link

physical

38. Which Frame Relay flow control mechanism is used to signal routers that they should

reduce the flow rate of frames?

DE

BE

CIR

FECN

CBIR

39. A network administrator is instructing a technician on best practices for applying ACLs.

Which suggestion should the administrator provide?

Named ACLs are less efficient than numbered ACLs.

Standard ACLs should be applied closest to the core layer.


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ACLs applied to outbound interfaces are the most efficient.

Extended ACLs should be applied closest to the source that is specified by the ACL.

40. When Frame Relay encapsulation is used, what feature provides flow control and

exchanges information about the status of virtual circuits?

LCP

LMI

DLCI

Inverse ARP

41.

Refer to the exhibit. Results of the show vlan and show vtp status commands for switches S1

and S2 are displayed in the exhibit. VLAN 11 was created on S1. Why is VLAN 11 missing

from S2?

There is a Layer 2 loop.

The VTP domain names do not match.

Only one switch can be in server mode.

S2 has a higher spanning-tree priority for VLAN 11 than S1 does.

42. An administrator is configuring a dual stack router with IPv6 and IPv4 using RIPng. The

administrator receives an error message when trying to enter the IPv4 routes into RIPng. What

is the cause of the problem?

When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are over-written

in favor of the newer technology.

Incorrect IPv4 addresses are entered on the router interfaces.

RIPng is incompatible with dual-stack technology.

IPv4 is incompatible with RIPng.


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43. What will be the result of adding the command ip dhcp excluded-address 192.168.24.1

192.168.24.5 to the configuration of a local router that has been configured as a DHCP

server?

Traffic that is destined for 192.168.24.1 and 192.168.24.5 will be dropped by the router.

Traffic will not be routed from clients with addresses between 192.168.24.1 and

192.168.24.5.

The DHCP server will not issue the addresses ranging from 192.168.24.1 to 192.168.24.5.

The router will ignore all traffic that comes from the DHCP servers with addresses

192.168.24.1 and 192.168.24.5.

44.Refer to the exhibit. Headquarters is connected through the Internet to branch office A and

branch office B. Which WAN technology would be best suited to provide secure connectivity

between headquarters and both branch offices?

ATM

VPN

ISDN

Frame Relay

broadband DSL

45. Which configuration on the vty lines provides the best security measure for network

administrators to remotely access the core routers at headquarters?

Answer: 3nd option


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46. When would the multipoint keyword be used in Frame Relay PVCs configuration?

when global DLCIs are in use

when using physical interfaces

when multicasts must be supported

when participating routers are in the same subnet

47. Which option correctly defines the capacity through the local loop guaranteed to a

customer by the service provider?

BE

DE

CIR

CBIR

48.

Refer to the exhibit. A network administrator configures a standard access control list on

Router1 to prohibit traffic from the 192.168.0.0/24 network from reaching the Internet. The

access control list also permits traffic from the 192.168.0.0/24 network to reach the

192.168.1.0/24 network. On which interface and in which direction should the access control

list be applied?

interface Fa0/0, inbound

interface Fa0/0, outbound

interface S0/0/0, inbound

interface S0/0/0, outbound

49. Which three guidelines would help contribute to creating a strong password policy?

(Choose three.)

Once a good password is created, do not change it.

Deliberately misspell words when creating passwords.


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Create passwords that are at least 8 characters in length.

Use combinations of upper case, lower case, and special characters.

Write passwords in locations that can be easily retrieved to avoid being locked out.

Use long words found in the dictionary to make passwords that are easy to remember.

50.

Refer to the exhibit. A host connected to Fa0/0 is unable to acquire an IP address from the

DHCP server. The output of the debug ip dhcp server command shows "DHCPD: there is no

address pool for 10.1.1.1". What is the problem?

The 10.1.1.1 address is already configured on Fa0/0.

The default router for the 10Network pool is incorrect.

The ip helper-address must be added to Fa0/0 interface.

The pool of addresses for the 10Network pool is incorrect.

51. Which statement is true about PAP in the authentication of a PPP session?

PAP uses a two-way handshake.

The password is unique and random.

PAP conducts periodic password challenges.

PAP uses MD5 hashing to keep the password secure.

52.

Refer to the exhibit. A network administrator is attempting to configure a Frame Relay

network. The administrator enters the commands as shown in the exhibit on R2, but the

Frame Relay PVCs are inactive. What is the problem?

The incorrect DLCI numbers are being configured on R2.


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The S0/0/0 interface on R2 needs to be point-to-point.

The frame-relay map commands are missing the cisco keyword at the end.

A single router interface cannot connect to more than one Frame Relay peer at a time.

ccna 4 final aaa

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