Multiplexing - Computer Networks Questions and Answers

1.

Which multiplexing technique transmits digital signals?

   A.) FDM
   B.) TDM
   C.) WDM
   D.) None of these

Answer: Option 'B'

TDM

2.

If link transmits 4000frames per second, and each slot has 8 bits,the transmission rate of circuit this TDM is

   A.) 32kbps
   B.) 500bps
   C.) 500kbps
   D.) None of these

Answer: Option 'A'

Transmission rate= frame rate * number os bits in a slot.

3.

If there are n signal sources of same data rate than TDM link has _______ slots

   A.) n
   B.) n/2
   C.) n*2
   D.) 2^n

Answer: Option 'A'

Each slot is dedicated to one of the source.

4.

Multiplexing technique that shifts each signal to a different carrier frequency

   A.) FDM
   B.) TDM
   C.) Either a or b
   D.) Both a and b

Answer: Option 'A'

FDM stands for Frequency division multiplexing.

5.

In TDM, the transmission rate of the multiplexed path is usually _______ the sum of the transmission rates of the signal sources.

   A.) Greater than
   B.) Lesser than
   C.) Equal to
   D.) Equal to or greater than

Answer: Option 'A'

Greater than

7.

The sharing of a medium and its link by two or more devices is called _______

   A.) Fully duplexing
   B.) Multiplexing
   C.) Both a and b
   D.) None of these

Answer: Option 'B'

Multiplexing

8.

Multiplexing can provide

   A.) Efficiency
   B.) Privacy
   C.) Anti jamming
   D.) Both a and b

Answer: Option 'D'

Both a and b

9.

The state when dedicated signals are idle are called

   A.) Death period
   B.) Poison period
   C.) Silent period
   D.) None of these

Answer: Option 'C'

Silent period

10.

Multiplexing is used in _______

   A.) Packet switching
   B.) Circuit switching
   C.) Data switching
   D.) None of these

Answer: Option 'B'

Circuit switching


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