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 CCNA Questions

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Q:

How many bits are in an IPv6 address field?

A) 24 B) 16
C) 32 D) 128
 
Answer & Explanation Answer: B) 16

Explanation:

There are 16 bits (four hex characters) in an IPv6 field.

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Q:

When data is encapsulated , which is the correct order?

A) Data, frame, packet, segment, bit B) Segment, data, packet, frame, bit
C) Data, segment, packet, frame, bit D) Data, segment, frame, packet, bit
 
Answer & Explanation Answer: C) Data, segment, packet, frame, bit

Explanation:

The encapsulation method is data, segment, packet, frame, bit.

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Q:

To use VLSM, what capability must the routing protocols in use possess?

A) Support for multicast B) Multi-protocol support
C) Transmission of subnet mask information D) Support for unequal load balancing
 
Answer & Explanation Answer: C) Transmission of subnet mask information

Explanation:

To use VLSM, the routing protocols in use possess the capability to transmit subnet mask information.

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Q:

Your company wants to reconfigure a Catalyst 2950. Which actions must be taken to erase the old configuration?(Choose three)

A. Erase flash
B. Restart the switch
C. Delete the VLAN database
D. Erase the startup configuration

Answer

Answer: B  C  D

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Q:

Which layer defines how data is formatted , presented, encoded, and converted for use on the network?

Answer

The presentation layer makes sure that data is in a readable format for the Application layer.

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Q:

What is the most common attack on a network today?

A) Lock picking B) Naggle
C) DoS D) auto secure
 
Answer & Explanation Answer: C) DoS

Explanation:

The most common attack on a network today is a denial of service (DoS) because they are the easiest attack to achieve.

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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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Q:

What type of RJ45 UTP cable do you use to connect a PC's COM port to a router or switch console port?

A) Straight - through B) Crossover cable
C) Crossover with a CSU/DSU D) Rolled
 
Answer & Explanation Answer: D) Rolled

Explanation:

To connect to a router or switch console port, you would use an RJ45 UTP rolled cable.

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