Classical

Computer Networks - Network Fundamentals

16:  

In time division switches, if each memory access takes 100 ns and one frame period is 125ms, then maximum number of lines that can be supported is 

A.

625

B.

1250

C.

2300

D.

318

 
 

Option: A

Explanation :

In time division switches 2nT = 1 frame period, where T = memory access time.


17:  

Frequency of failure and network recovery time after a failure are measures of what concept of a network ?

A.

Performance

B.

Reliability

C.

Security

D.

Feasibility

 
 

Option: B

Explanation :

Reliability can be measured by a frequency of failure and network recovery time after a failure. Catastrophic events. In this case frequency of failure and network recovery time after a failure are the reliability issues.


18:  

When a protocol specifies that address of the sender means the most recent sender and not the original source, what does this mean ?

A.

Syntax

B.

Semantics

C.

Timing

D.

None of these 

 
 

Option: B

Explanation :

Protocol is a set of rules and regulations which manages the data communication system. Syntax refers to the structure or format of the data.
Semantics means meaning of data. Here this issue is semantic issue.


19:  

 Which of the following two networks can use possible hubs ?

A.

Ethernet

B.

Arcnet

C.

Both (a) & (b)

D.

All of these

 
 

Option: C

Explanation :




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