CCNA 2 Module 9 V3.1 Answers

1.

After issuing the command traceroute 192.168.4.2 from Router A, the following information is returned.
Tracing the route to Router_D (192.168.4.2)
1 Router_B (192.168.2.2) 16 msec 16 msec 16 msec
2 * * *
3 * * *
What can be concluded about the network shown in the graphic based on the output given?

Network 192.168.5.0 is missing from the routing table on Router A.

There is a problem with the connection between Router B and Router C.

Router C is not running CDP.

Some of the routers are non-Cisco devices.

Router B was not able to return ICMP TEMs to Router A.

 

2. Which of the following would be the default administrative distance of a static IP route that references the IP address of the next hop?

0

1

5

20

 

3. After issuing the show interfaces command, a technician notices the line "Serial1 is down, line protocol is down" in the output. Which of the following are possible reasons for this message output? (Choose three.)

There is a mismatch in the encapsulation type on both ends of the link.

A Layer 1 issue exists.

An interface problem exists.

The clockrate was not set during configuration.

There is no usable media for the protocol.

Keepalive messages are not being sent.

 

4. Which three correctly pair a routing metric with its description? (Choose three.)

hop count - the number of routers traversed to reach a destination

bandwidth - the amount of time it takes a packet to travel a link

load - the amount of activity on a link

delay - the link speed

reliability - the error rate on a link

 

5.

When issuing the show interfaces serial1 command, a network administrator receives the output shown in the graphic. What are the possible causes of an increase in the number of input errors? (Choose three.)

There could be Layer 3 addressing problems.

There could be a problem with faulty telephone equipment.

The router hardware could be defective.

There is an incorrectly configured encapsulation on the interface.

There could be a problem with the cabling.

 

6. Which ICMP message type notifies source hosts that a receiving host or network is not available?

time exceeded

redirect

destination unreachable

source quench

parameter problem

echo reply

 

7. The show interfaces command provides line and protocol status information. Which of the following conditions would never occur in the output of this command?

serial1 is up, line protocol is up

serial1 is up, line protocol is down

serial1 is down, line protocol is down

serial1 is down, line protocol is up

serial1 is administratively down, line protocol is down

 

8.

The network administrator shown in the exhibit can ping the E0 interface of the HAR router, but the telnet intranet.xyz.com command issued from the administrator's workstation fails to open a session with the intranet.xyz.com server. What are two possible causes of this problem? (Choose two.)

upper-layer application problems

domain name system problems

IP addressing problems on the HAR router

clock rate problems on the HAR router serial interface

ICMP connectivity problems

 

9. The network administrator is using a PC to access a router via the router console port. Both the PC and the router are powered on and a cable has been connected between them. However, a session cannot be established. Which steps might fix this problem? (Choose two.)

Verify the cable is properly connected at each end.

Reseat the network card in the PC.

Verify the cable is the correct type.

Verify that a password has been set on the console line.

Check the transceiver for link lights.

Reseat the console card on the router.

 

10. Which command will display routing table information about all known networks and subnetworks?

Router# show ip interfaces

Router# show ip connections

Router# show ip route

Router# show ip networks

 

11. A network technician has discovered that a router in the network can no longer be reached. The technician attempts to verify Layer 1 functionality, but is unable to physically inspect the cables. Which command can be used to determine the type of cable connected to the router?

Router# show interfaces

Router# show controllers serial

Router# show ip route

Router# show ip protocol

Router# show version

Router# show running-config

 

12. During the lookup process when forwarding a packet, a router checks its routing table for the best path to the destination. If a route has an administrative distance of 0, what does this indicate to the router?

The packet should be discarded.

The destination is unreachable.

The destination is a directly connected network.

The source of the update for that route is unreliable.

 

13. Which command will verify the functionality of all seven layers of the OSI model on a network host?

ping

debug

telnet

traceroute

 

14.

After issuing the show interfaces serial1 command, an administrator notices an increasing number of carrier transitions. What are the possible causes for this increase? (Choose two.)

There is an incorrect encapsulation configured on the interface.

There could be an interruption in the line by the service provider.

There is a faulty switch or CSU/DSU.

There is noise on the serial line.

 

15.

Consider the RIP network shown in the diagram. Which entries would be listed in the routing table of Router A?

R 192.168.5.2[120/1] via 192.168.15.0, 00:00:09, Serial0

R 192.168.15.0[120/1] via 192.168.5.2, 00:00:13, Serial1

R 192.168.15.0[120/1] via 192.168.5.1, 00:00:13, Serial0

R 192.168.5.1 [120/1] via 192.168.5.2 00:00:29, Serial1
R 192.168.15.0 [120/1] via 192.168.5.2, 00:00:29, Serial1

R 192.168.5.1 [120/1] via 192.168.5.2 00:00:18, Serial0
R 192.168.15.2 [120/1] via 192.168.5.2, 00:00:18, Serial0

 

16. Which items would be displayed when the show ip protocols command is executed? (Choose three.)

sources of routing updates

networks being advertised

routing protocol up or down

configured routed protocols

Layer 2 status of the interface

update timer values

 

17. Which two are true regarding the debug commands? (Choose two.)

Debug commands may be issued from the user EXEC prompt.

The command undebug all will turn off all debug operations.

By default, the router sends the debug output and messages to the telnet session.

The high processor overhead incurred using debug may disrupt normal router operation.

The debug all command provides a summary view of router activity and can be used frequently for troubleshooting.

The show debugging command will display current events such as traffic on an interface and error messages generated by nodes on the network.

 

18. A network administrator suspects that a network is not being included in the routing updates. Which command will provide information on when the next update is due and which networks are advertised in the update?

Router# show interfaces

Router# show controllers serial

Router# show ip protocols

Router# show ip route

Router# show running-config

 

19. Which of the following is a problem at the physical layer of the OSI model?

incorrect file formatting

incorrect encapsulation on a serial interface

incorrect routing protocol

incorrect cable type

 

20.

When the show cdp neighbors command is issued from Router C, which devices will be displayed in the output?

D, SWH-2

A, B, D

SWH-1, SWH-2

B, D

SWH-1, A, B

A, B, D, SWH-1, SWH-2

 

21. Which of the following are advantages of using a static route? (Choose three.)

secure operation

highly adaptable

low maintenance configuration

low processor overhead

precise control of path selection

 

22. Which of the following commands can be used to statically configure default routes? (Choose two.)

ip static-route

ip route

ip network-route

ip default-network

ip default-static

 

23. Why does a router build a routing table? (Choose two.)

to list available routes for forwarding data

to map local Layer 2 addresses to the remote Layer 3 destination address

to dynamically send periodic updates regarding the router's status

to prevent routing loops when redundant links are added to the network

to select the best path to a destination

 

24. Which of the following lines from the show interfaces output would indicate a Layer 2 problem?

Serial1 is up, line protocol is up.

Serial1 is up, line protocol is down.

Serial1 is down, line protocol is down.

Serial1 is administratively down, line protocol is down.