Digital Communication Questions and Answers
Q1.
The interface between the ring and the stations are passive.
Answer :
False
Q2.
For a throughput of value less than 0.20, which has less average delay?
Answer :
S-ALOHA
Q3.
In which modulation schemes, the spreading of spectrum occurs?
Answer :
Frequency modulation
Q4.
Spread spectrum signals are used for
Answer :
Ranging & Determination of position
Q5.
The preamble consists of
Answer :
1. Synchronization
2. Addressing
3. Error control sequence
Q6.
Frequency modulation technique involves
Answer :
Data & Frequency hopping modulation
Q7.
Spread spectrum has immunity from
Answer :
Noise & Multi-path distortion
Q8.
The original bandwidth of the unspread signal in spread spectrum is ____ to data rate.
Answer :
Proportional
Q9.
The 64 bit block input key has _____ number of parity bits.
Answer :
8
Q10.
In which method cipher feedback is used?
Answer :
Self synchronous encryption method
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