Top 150+ Solved Data Communication and Networking MCQ Questions Answer
Q. Differential Manchester and multi line transmission (MLT-3) schemes differ in
a. Number of transition rules to encode binary data
b. Self synchronization
c. Both a and b
d. None of the above
Q. OSI model defines an open system as
a. a set of protocols that allows any two different systems to communicate
b. a set of rules for open access
c. a standard
d. None of the above
Q. Shannon capacity formula for noisy channel is
a. C = B Log (SNR)
b. C = B Log (1/SNR)
c. C = B Log (1 + SNR)
d. None of the above
Q. In sliding window, if the window size is 63, what is the range of sequence numbers?
a. 0 to 63
b. 0 to 64
c. 1 to 63
d. 1 to 64
Q. Regulation of the rate of transmission of data frames is known as
a. Line discipline
b. Data rate control
c. Flow control
d. Switch control
Q. When a primary device wants to send data to a secondary device, it needs to first send _______ frame.
a. ACK
b. Poll
c. SEL
d. ENQ
Q. Flow control is needed to prevent
a. Bit errors
b. Overflow of sender buffer
c. Overflow of receiver buffer
d. Collision
Q. In a Go-Back-N ARQ, if the window size is 63, what is the range of sequence numbers?
a. 0 to 63
b. 0 to 64
c. 1 to 63
d. 1 to 64
Q. In Go-Back-N ARQ, if frames 4, 5, and 6 are received successfully, the receiver may send an ACK _______ to the sender.
a. 5
b. 6
c. 7
d. any of the above
Q. ARQ stands for _______.
a. Automatic repeat quantization
b. Automatic repeat request
c. Automatic retransmission request
d. Acknowledge repeat request
Q. For Stop-and-Wait ARQ, for 10 data packets sent, _______ acknowledgments are needed.
a. exactly 10
b. less than 10
c. more than 10
d. none of the above
Q. HDLC is an acronym for _______.
a. High-duplex line communication
b. High-level data link control
c. Half-duplex digital link combination
d. Host double-level circuit