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IOS and Security Device Manager

1.

You type the following command into the router and receive the following output:

"Router#show serial 0/0
        ^
% Invalid input detected at '^' marker."

Why was this error message displayed?

Answer: B

You can view the interface statistics from user mode, but the command is show interface serial 0/0.

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2.

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

Answer: C

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

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3.

What is the problem with an interface if you type show interface serial 0 and receive the following message? "Serial0 is administratively down, line protocol is down."

Answer: B

If an interface is shut down, the show interface command will show the interface as administratively shut down. (It is possible that no cable is attached, but you can't tell that from this message.)

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Answer: B

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

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5.

You need to find the broadcast address used on a LAN on your router. What command will you type into the router from user mode to find the broadcast address?

Answer: C

The command show ip protocols will actually show you the broadcast address for each interface - too bad it isn't a possible answer. Your best answer is show interfaces, which will provide the IP address and mask for each interface.

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6.

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

Answer: C

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.

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7.

You set the console password, but when you display the configuration, the password doesn't show up; it looks like this:

[output cut]
Line console 0
    Exec-timeout 1 44
    Password 7098C0BQR
    Login
[output cut]

What cause the password to be stored like this? 

Answer: B

The command service password-encryption, from global configuration mode, will encrypt the passwords.

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8.

What layer of the OSI model would you assume the problem is in if you type show interface serial 1 and receive the following message? "Serial1 is down, line protocol is down."

Answer: A

If you see that a serial interface and the protocol are both down, then you have a Physical layer problem. If you see serial1 is upline protocol is down, then you are not receiving (Data Link) keepalives from the remote end.

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9.

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

Answer: B

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

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10.

You want to totally reinitialize the router and replace the current running-config with the current startup-config. What command will you use?

Answer: C

To completely replace the running-config with the startup-config, you must reload the router. Note : You may have picked option C, which isn't a bad answer. Remember, though, it doesn't replace the configuration, it appends it.

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