Digital Communication Questions and Answers
Q1.
The maximum packet size of Ethernet is
Answer :
1526 bytes
Q2.
In Aloha technique, the re-transmission takes place immediately.
Answer :
False
Q3.
Which method is better suited for large population?
Answer :
Binary tree search
Q4.
Which system makes the detection difficult for all users other than the intended users?
Answer :
Low probability of intercept & detection
Q5.
In spread spectrum technique, the desired signal is multiplied _____ and interference signal is multiplied _____
Answer :
Twice, once
Q6.
The maximum waiting time before transmission of a packet is
Answer :
(M-1)T/M
Q7.
Spread spectrum can be used to transmit
Answer :
Analog & Digital data
Q8.
Which filter is used to get the final FHSS signal?
Answer :
Band pass filter
Q9.
In substitution technique encryption protection is more.
Answer :
False
Q10.
The segment of the key-stream of plaintext is obtained by _____ of two sequences together.
Answer :
Modulo 2 addition
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