Question 1

How many simultaneous Telnet sessions does a Cisco router support by default?

Accepted Answer

Cisco routers, if they do not have the Enterprise edition of the IOS, will default to 5 simultaneous Telnet sessions.

Question 2

Which of the following commands sets the secret password to Cisco?

Accepted Answer

The enable secret password is case sensitive, so the second option is wrong. To set the enable secret , use the enable secret command from global configuration mode.

Question 3

What keystroke will terminate setup mode?

Accepted Answer

You can exit setup mode at any time by using the keystroke Ctrl+C.

Question 4

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 5

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 sto…

Accepted Answer

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

Question 6

Which command will delete the contents of NVRAM on a router?

Accepted Answer

The erase startup-config command erases the contents of NVRAM and will put you in setup mode if the router is restarted.

Question 7

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."

Accepted Answer

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.)

Question 8

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 9

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."

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 serial1 is up, line protocol is down, then you are not receiving (Data Link) keepalives from the remote end.

Question 10

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?

Accepted Answer

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

Question 11

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 12

Which of the following commands will display the current IP addressing and the layer 1 and 2 status of an interface? show version show protocols show interfaces show controllers show ip interface

Accepted Answer

The commands show protocols, show interfaces, and show ip interface will show you the layer 1 and 2 status and the IP addresses of your router's interfaces.

Question 13

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

Accepted Answer

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.

Question 14

You type show running-config and get this output: [output cut]
Line console 0
    Exec-timeout 1 35
    Password CURIOUSTABPASSWD
    Login
[output cut]
 What do the two numbers following the exec-timeout command mean?

Accepted Answer

The exec-timeout command is set in minutes and seconds.

Question 15

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 16

Which of the following commands displays the configurable parameters and statistics of all interfaces on a router?

Accepted Answer

With the show interfaces command, you can view the configurable parameters, get statistics for the interfaces on the router, verify if the interfaces are shut down, and see the IP address of each interface.

Question 17

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 ( copy run start for short).

Question 18

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

Accepted Answer

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.

Question 19

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?

Accepted Answer

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.

IOS and Security Device Manager Questions