DATA LINK LAYER WIRED NETWORKS
DATA LINK CONTROL DLC
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Go-Bank-N ARQ
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Stop-and-Wait ARQ
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Selective Repeat ARQ
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None of the above
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Detailed explanation-1: -In selective repeat protocol, the retransmitted frame is received out of sequence. In Selective Repeat ARQ only the lost or error frames are retransmitted, whereas correct frames are received and buffered.
Detailed explanation-2: -Stop-and-Wait ARQ is the basic form of ARQ protocol where the sender sends one packet at a time and then waits for an ACK or NACK signal from the receiver before sending the same or a new packet. The receiver sends an ACK signal following receipt of a good packet.
Detailed explanation-3: -In Go-Back-N, if a sent frame is found suspected or damaged, then all the frames are retransmitted till the last packet. In Selective Repeat, only the suspected or damaged frames are retransmitted. Sender Window is of size N. Sender Window size is same as N.