Classical

Computer Networks - Data Communication & Network Security

96:  

A high speed communication equipment typically would not be needed for

A.

E-mail

B.

transferring large volume of data

C.

supporting communication between nodes in a LAN

D.

all of these

 
 

Option: A

Explanation :

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97:  

Protection of data from a natural disaster such as a tornado belongs to which of the following network issue ?

A.

Performance

B.

Reliability

C.

Security

D.

Management

 
 

Option: B

Explanation :

Protection of data from a natural disaster such as tornado, earthquakes, (or) fire etc. are the network reliability issues. These are also called catastrophic events.

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98:  

Decryption and encryption of data are responsibility of

A.

physical layer

B.

data link layer

C.

presentation layer

D.

session layer 

 
 

Option: C

Explanation :

 To send any important information (or) any sensitive information that must be able to assure privacy.
Encryption means encoding of original information, decryption means decoding.
Encryption (decryption (original message) = original message. 

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