Question 1

To use VLSM, what capability must the routing protocols in use possess?

Accepted Answer

To use VLSM, the routing protocols in use possess the capability to transmit subnet mask information.

Question 2

What network service is the most likely problem if you can ping a computer by IP address but not by name?

Accepted Answer

The most likely problem if you can ping a computer by IP address but not by name is a failure of DNS.

Question 3

What switch must be added to the ipconfig command on a PC to verify DNS configuration?

Accepted Answer

The /all switch must be added to the ipconfig command on a PC to verify DNS configuration.

Question 4

Which of the following is a result of route aggregation?

Accepted Answer

Route aggregation results in smaller routing tables.

Question 5

What command is the Windows version of the Cisco command that displays the networks traversed on a path to a network destination?

Accepted Answer

tracert is the Windows version of the Cisco command that displays the networks traversed on a path to a network destination.

Question 6

Which command displays IP-to-MAC- address mappings on a Windows PC?

Accepted Answer

The arp -a command displays IP-to-MAC-address mappings on a Windows PC.

Question 7

What command displays the ARP table on a Cisco router?

Accepted Answer

The command that displays the ARP table on a Cisco router is show ip arp.

Question 8

When a ping to the loopback address fails , what can you assume?

Accepted Answer

When a ping to the loopback address fails , you can assume the IP stack has failed to initialize.

Question 9

When a ping to the local host IP address fails, what can you assume?

Accepted Answer

When a ping to the local host IP address fails, you can assume the NIC is not functional.

Question 10

If you wanted administrators to see a message when logging into the router, which command would you use?

Accepted Answer

The typical banner is a message of the day (MOTD) and is set by using the global configuration mode command banner motd.

Question 11

What command do you type to save the configuration stored in RAM to NVRAM?

Accepted Answer

To copy the running - config to NVRAM so that it will be used if the router is restarted , use the copy running-config startup-config command in privileged mode (copy run start for short).

Question 12

Which command will show you whether a DTE or a DCE cable is plugged into serial 0?

Accepted Answer

The Show controllers serial 0 command will show you whether either a DTE or DCE cable is connected to the interface. If it is a DCE connection, you need to add clocking with the clock rate command

Question 13

If you delete the contents of NVRAM and reboot the router , what mode will you be in?

Accepted Answer

If you delete the startup-config and reload the router, the router will automatically enter setup mode. You can also type setup from privileged mode at any time.

Question 14

Which of the following commands will configure all the default VTY ports on a router?

Accepted Answer

From global configuration mode, use the line vty 0 4 command to set all five default VTY lines

Question 15

You type Router#sh ru and receive a % ambiguous command error. why did you receive this message?

Accepted Answer

The % ambiguous command error means that there is more than one possible show command that starts with ru. Use a question mark to find the correct command.

Question 16

At which layer of the OSI model would you assume the problem is if you type show interface serial 1 and receive the following message? Serial 1 is down, line protocol is down

Accepted Answer

If you see that a serial interface and the protocol are both down, then you have a physical layer problem. If you see serial 1 is up, line protocol is down, then you are not receiving (Data Link) Keepalives from the remote end.

Question 17

Which commands loads a new version of the Cisco IOS into a router?

Accepted Answer

The command copy tftp flash will allow you to copy a new IOS into flash memory on your router.

Question 18

You copy a configuration from a network host to a router's RAM. The configuration looks correct, yet it is not working at all. What could the problem be?

Accepted Answer

Since the configuration looks correct, you probably didn't screw up the copy job. However , when you perform a copy from a network host to a router , the interfaces are automatically shut dow and need to be manually enabled with the no shutdown command.

Question 19

The corporate office sends you a new router to connect, but upon connecting the console cable, you see that there is already a configuration on the router. What should be done before a new configuration is entered in the router?

Accepted Answer

Before you start to configure the router, you should erase the NVRAM with the erase startup-config command and then reload the router using the reload command.

CISCO Certification Questions