Protocol 2 considers noise on the channel and requires feedback from receiver.
(2)判断题Procotol 3 uses timer and sequence number.
(3)判断题The sequence number used in Protocol 3 can range between 0 and 1.
(4)单选题Amongst the 6 elementary DLL protocols:
A Simplex stop-and-wait protocol uses piggybacking;
B For go-back-n protocol, receiving window = 1;
C For go-back-n protocol, sending window = MAX_SEQ;
D For selective repeat protocol, the sending window <= MAX_SEQ.
(5)单选题Go back N protocol
A requires larger receiving window
B suitable for network with low error rate
C max sending window size is the max sequence number
D receiving window size should be larger than max sequence number
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