CCNA 4 Final Exam V4.0 Answers

1. 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

2. 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.

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.

3.

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.

4. Which option correctly defines the capacity through the local loop

guaranteed to a customer by the service provider?

BE

DE

CIR

CBIR

5.

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.

6. Which data link layer encapsulation protocol is used by default for

serial connections between two Cisco routers?

ATM

Frame Relay

HDLC

PPP

SDLC

7.

Refer to the exhibit. Which statement correctly describes how Router1

processes an FTP request 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.

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

theaccess-list 201 permit ip any any command and allows the packet

into the router.

8. 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

9. 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

10. 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.

11.

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.

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. 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.

14. 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

15.

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 of an enable secret password

16. 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.

17. An issue of response time has recently arisen on an application

server. The new release of a 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 in isolation.

Only results from the software package should be tested as the network

is designed to accommodate the proposed software platform.

18.

Refer to the exhibit. From the output of the show

interfaces and pingcommands, at which layer of the OSI model is a

fault indicated?

application

transport

network

data link

physical

19. Which technology is used to dynamically map next hop, network

layer addresses to virtual circuits in a Frame Relay network?

Inverse ARP

LMI

DLCI

FECN

20. 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

21.

Refer to the exhibit. Which data transmission technology is being

represented?

TDM

PPP

HDLC

SLIP

22.

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.

23. 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.

All services must provide an encrypted password to function.

Only encrypted messages are allowed for router communication.

24. 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?

application layer

network layer

data link layer

physical layer

25. Where does a service provider assume responsibility from a customer

for a WAN connection?

local loop

DTE cable on router

demarcation point

demilitarized zone

26. 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.

27.

Refer to the exhibit. Partial results of the show access-lists and show

ip interface FastEthernet 0/1 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 .

28.

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?

/19

/20

/21

/22

/23

/24

29.

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.

30.

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

31. 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.

32. 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.

33. 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

34. Which statement is true about NCP?

Link termination is the responsibility of NCP.

Each network protocol has a corresponding NCP.

NCP establishes the initial link between PPP devices.

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

35.

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.

36.

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.

Telnet to 172.16.20.0/24 is denied.

Telnet to 172.16.0.0/24 is permitted.

Telnet to 172.16.10.0/24 is permitted.

Telnet to 172.16.20.0/24 is permitted.

37. 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

38.

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

39. 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

40.

Refer to the exhibit. What can be concluded from the exhibited output of

thedebug ip nat command?

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.

41. 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.

ACLs applied to outbound interfaces are the most efficient.

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

the ACL.

42.

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

43. 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

44.

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.

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.

45. 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

access-list 10 deny 192.168.16.43 0.0.0.16

46. 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

47. 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

48. 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

49.

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

50.

Refer to the exhibit. All devices are configured as shown in the exhibit.

PC1 is unable to ping the 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.

51. 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

52. 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 a faster 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.