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Q:

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

A) Physical layer B) Data Link layer
C) Network layer D) None
 
Answer & Explanation Answer: A) Physical layer

Explanation:

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.

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Q:

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

A) enable secret password Cisco B) enable secret cisco
C) enable secret Cisco D) enable password Cisco
 
Answer & Explanation Answer: C) enable secret Cisco

Explanation:
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Q:

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

A) Router#line vty 0 4 B) Router (config) #line vty 0 4
C) Router (config-if)#line console 0 D) Router(config)#line vty all
 
Answer & Explanation Answer: B) Router (config) #line vty 0 4

Explanation:

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

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Q:

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

A) privileged mode B) Global mode
C) Setup mode D) NVRAM loaded mode
 
Answer & Explanation Answer: C) Setup mode

Explanation:

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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Q:

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

A) sh int s0 B) sh int serial 0
C) show controllers s 0 D) show serial 0 controllers
 
Answer & Explanation Answer: C) show controllers s 0

Explanation:

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

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Q:

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

A) Router (config) #copy current to starting B) Router #copy starting to running
C) Router (config) #copy running - config startup - config D) Router#copy run start
 
Answer & Explanation Answer: D) Router#copy run start

Explanation:

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).

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Q:

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

A) message banner motd B) banner message motd
C) banner motd D) message motd
 
Answer & Explanation Answer: C) banner motd

Explanation:

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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Q:

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

A) The IP address of the local host is incorrect B) The IP address of the remote host is incorrect
C) The NIC is not functional D) The IP stack has failed to initialize
 
Answer & Explanation Answer: C) The NIC is not functional

Explanation:

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

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