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 CCNA Questions

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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:

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:

Which layer is used for reliable communication between end nodes over the network and provides mechanisms for establishing , maintaining , and terminating virtual circuits; transport - fault detection and recovery; and controlling the flow of information?

Answer

The Transport layer uses virtual circuits to create a reliable connection between two hosts.

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Q:

Pat Address Translation is also called what?

A) NAT Fast B) NAT Static
C) NAT Overload D) Overloading Static
 
Answer & Explanation Answer: C) NAT Overload

Explanation:

Another term for port Address Translation is NAT Overload because that is the keyword used to enable port address translation.

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Q:

Convert the following from binary format to decimal IP address.

11001100.00110011.10101010.01010101

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Q:

Which of the following is an example of a standard IP access list?

A) access - list 110 permit host 1.1.1.1 B) access - list 1 deny 172 . 16 . 10 . 1 0 . 0 . 0 . 0
C) access - list 1 permit 172 . 16 . 10 . 1 255 . 255 . 0 . 0 D) access - list standard 1 . 1 . 1 . 1
 
Answer & Explanation Answer: B) access - list 1 deny 172 . 16 . 10 . 1 0 . 0 . 0 . 0

Explanation:

Standard IP access lists use the numbers 1 - 99 and 1300 - 1999 and filter based on source IP address only. Option C is incorrect because the mask must be in wildcard format.

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Q:

Convert the following from decimal IP address to binary format.

192.168.10.15

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Q:

If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?

A) Discard it and send an error message back to the originating host B) Flood the network with the frame
C) Add the source addres and port to the MAC address table and forward the frame out the destination port D) Add the destination to the MAC address table and then forward the frame
 
Answer & Explanation Answer: C) Add the source addres and port to the MAC address table and forward the frame out the destination port

Explanation:

Since the source MAC address is not in the MAC address table, the switch will add the source address and the port it is connected to into the MAC address table and then forward the frame to the outgoing port.

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