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Q:

Which of the following is the best description of the operation of split horizon?

A) Information about a route should not be sent back in the direction from which the original update came B) It splits the traffic when you have a large bus (horizon) physical network
C) It holds the regular updates from broadcasting to a downed link D) It prevents regular update messages from reinstating a route that has gone down
 
Answer & Explanation Answer: A) Information about a route should not be sent back in the direction from which the original update came

Explanation:

A split horizon will not advertise a route back to the same router it learned the route from.

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Q:

What is the command to copy the startup-config filre to DRAM?

Answer

copy start run

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Subject: CCNA

Q:

What is the command to copy a Cisco IOS to a TFTP server?

Answer

copy flash tftp

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Q:

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?

A) You must type the show ip rip command first B) IP addressing on the network is incorrect
C) You must use the terminal monitor command D) Debug output is sent only to the console.
 
Answer & Explanation Answer: C) You must use the terminal monitor command

Explanation:

To see console messages through your Telnet session, you must enter the terminal monitor command.

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Q:

If you want to have more than one Telnet session open at the same time, what keystroke combination would you use?

A) Tab+spacebar B) Ctrl+X, then 6
C) Ctrl+Shift+X, then 6 D) Ctrl+Shift+6, then X
 
Answer & Explanation Answer: D) Ctrl+Shift+6, then X

Explanation:

To keep open one or more Telnet sessions, use the Ctrl+Shift+6 and then X keystroke combination.

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Q:

You need to gather the IP address of a remote switch that is located in Hawaii. What can you do to find the address?

A) Issue the show ip route command on the router connected to the switch B) Issue the show cdp neighbor command on the router connected to the switch
C) Issue the show ip arp command on the router connected to the switch D) Issue the show cdp neighbors detail command on the router connected to the switch
 
Answer & Explanation Answer: D) Issue the show cdp neighbors detail command on the router connected to the switch

Explanation:

Although option A is certainly the "best" answer, unfortunately option E will work just fine and your boss would probably prefer you to use the show cdp neighbors detail command.

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Q:

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?

A) Router>ping B) Router>trace
C) Router>show ip route D) Router>show interface
 
Answer & Explanation Answer: B) Router>trace

Explanation:

The command traceroute (trace for short), which can be issued from user mode or privileged mode, is used to find the path a packet takes through an internetwork and will also show you where the packet stops because of an error on a router.

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Q:

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?

A) RAM should be erased and the router restarted B) Flash should be erased and the router restarted
C) NVRAM should be erased and the router restarted D) The new configuration should be entered and saved
 
Answer & Explanation Answer: C) NVRAM should be erased and the router restarted

Explanation:

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.

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