multiplexing & spread spectrum

The transmission bandwidth of spread spectrum techniques is equal to the minimum required signal bandwidth.

• TRUE

• FALSE

Synchronous Time-Division Multiplexing (TDM) is not efficient because of

• higher data rate

• infinite frames

• empty slots

• Both A and C

Multiplexing technique, in which each input connection has an allotment in the output even if it is not sending data is

• Asynchronous TDM

• Synchronous TDM

• FDM

• WDM

How many types of multiplexing techniques are

• one

• two

• three

• four

In multiplexing, channels are separated by unused strips of bandwidth guard bands - to prevent

• Synchronization

• Overlapping

• random motion of electrons

• Both B & C

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

• Fully duplexing

• Multiplexing

• Micropleixng

• Duplexing

Multiplexing is used in _______

• Packet switching

• Circuit switching

• Data switching

• Packet & Circuit switching

Which multiplexing technique used to transmit digital signals?

• FDM

• TDM

• WDM

• FDM & WDM

If there are n signal sources of same data rate, then the TDM link has _______ slots.

• n

• n/2

• n*2

• 2n

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

• 32kbps

• 500bps

• 500kbps

• 32bps