Review Questions

You can find the answers in Appendix B.

1. What is the command confreg 0x2142 used for?
   1. It is used to restart the router.
   2. It is used to bypass the configuration in NVRAM.
   3. It is used to enter ROM monitor mode.
   4. It is used to view the lost password.
2. Which command will copy the IOS to a backup host on your network?
   1. transfer IOS to 172.16.10.1
   2. copy run start
   3. copy tftp flash
   4. copy start tftp
   5. copy flash tftp
3. You are troubleshooting a connectivity problem in your corporate network and want to isolate the problem. You suspect that a router on the route to an unreachable network is at fault. What IOS user exec command should you issue?
   1. Router>ping
   2. Router>trace
   3. Router>show ip route
   4. Router>show interface
   5. Router>show cdp neighbor
4. 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?
   1. You copied the wrong configuration into RAM.
   2. You copied the configuration into flash memory instead.
   3. The copy did not override the shutdown command in running-config.
   4. The IOS became corrupted after the copy command was initiated.
5. A network administrator wants to upgrade the IOS of a router without removing the image currently installed. What command will display the amount of memory consumed by the current IOS image and indicate whether there is enough room available to hold both the current and new images?
   1. show version
   2. show flash
   3. show memory
   4. show buffers
   5. show running-config
6. 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?
   1. RAM should be erased and the router restarted.
   2. Flash should be erased and the router restarted.
   3. NVRAM should be erased and the router restarted.
   4. The new configuration should be entered and saved.
7. Which command loads a new version of the Cisco IOS into a router?
   1. copy flash ftp
   2. copy ftp flash
   3. copy flash tftp
   4. copy tftp flash
8. Which command will show you the IOS version running on your router?
   1. sh IOS
   2. sh flash
   3. sh version
   4. sh running-config
9. What should the configuration register value be after you successfully complete the password recovery procedure and return the router to normal operation?
   1. 0x2100
   2. 0x2101
   3. 0x2102
   4. 0x2142
10. You save the configuration on a router with the copy running-config startup-config command and reboot the router. The router, however, comes up with a blank configuration. What can the problem be?
    1. You didn't boot the router with the correct command.
    2. NVRAM is corrupted.
    3. The configuration register setting is incorrect.
    4. The newly upgraded IOS is not compatible with the hardware of the router.
    5. The configuration you save is not compatible with the hardware.
11. If you want to have more than one Telnet session open at the same time, what keystroke combination would you use?
    1. Tab+spacebar
    2. Ctrl+X and then 6
    3. Ctrl+Shift+X and then 6
    4. Ctrl+Shift+6 and then X
12. You are unsuccessful in telnetting into a remote device, but you could telnet to the router earlier. What could the problem be? (Choose two.)
    1. IP addresses are incorrect.
    2. Access control list is filtering Telnet.
    3. There is a defective serial cable.
    4. The VTY password has been removed.
13. What information is displayed by the show hosts command? (Choose two.)
    1. Temporary DNS entries
    2. The names of the routers created using the hostname command
    3. The IP addresses of workstations allowed to access the router
    4. Permanent name-to-address mappings created using the ip host command
    5. The length of time a host has been connected to the router via Telnet
14. Which three commands can be used to check LAN connectivity problems on a router?
    1. show interfaces
    2. show ip route
    3. tracert
    4. ping
    5. dns lookups
15. You telnet to a router and make your necessary changes; now you want to end the Telnet session. What command do you type in?
    1. close
    2. disable
    3. disconnect
    4. exit
16. You telnet into a remote device and type debug ip rip, but no output from the debug command is seen. What could the problem be?
    1. You must type the show ip rip command first.
    2. IP addressing on the network is incorrect.
    3. You must use the terminal monitor command.
    4. Debug output is sent only to the console.
17. Which command displays the configuration register setting?
    1. show ip route
    2. show boot version
    3. show version
    4. show flash
18. You need to gather the IP address of a remote switch that is located in Hawaii. What can you do to find the address?
    1. Fly to Hawaii, console into the switch, and then relax and have a drink with an umbrella in it.
    2. Issue the show ip route command on the router connected to the switch.
    3. Issue the show cdp neighbor command on the router connected to the switch.
    4. Issue the show ip arp command on the router connected to the switch.
    5. Issue the show cdp neighbor detail command on the router connected to the switch.
19. You have your laptop directly connected into a router's Ethernet port. Which of the following are among the requirements for the copy flash tftp command to be successful? (Choose three.)
    1. TFTP server software must be running on the router.
    2. TFTP server software must be running on your laptop.
    3. The Ethernet cable connecting the laptop directly into the router's Ethernet port must be a straight-through cable.
    4. The laptop must be on the same subnet as the router's Ethernet interface.
    5. The copy flash tftp command must be supplied the IP address of the laptop.
    6. There must be enough room in the flash memory of the router to accommodate the file to be copied.
20. The configuration register setting of 0x2102 provides what instructions to a router?
    1. Tells the router to boot into ROM monitor mode
    2. Provides password recovery
    3. Tells the router to look in NVRAM for the boot sequence
    4. Boots the IOS from a TFTP server
    5. Boots an IOS image stored in ROM