Data Link Control and Protocols

Data Link Control and Protocols - Data Link Control and...

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Data Link Control and Protocols 1: 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 2: 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 3: ARQ stands for _______. a. Automatic repeat quantization b. Automatic repeat request c. Automatic retransmission request d. Acknowledge repeat request 4: For Stop-and-Wait ARQ, for <i>10</i> data packets sent, _______ acknowledgments are needed. a. exactly 10 b. less than 10 c. more than 10 d. none of the above 5: 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 6: Data link control deals with the design and procedures for ______ communication. a. node-to-node b. host-to-host c. process-to-process d. none of the above 7: _______ in the data link layer separates a message from one source to a destination, or from other messages going from other sources to other destinations. a. Digitizing b. Controlling c. Framing d. none of the above 8: In _______ framing, there is no need for defining the boundaries of frames. a. fixed-size b. variable-size c. standard d. none of the above 9: In ________ framing, we need a delimiter (flag) to define the boundary of two frames. a. fixed-size b. variable-size c. standard d. none of the above
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10: _________framing uses two categories of protocols: character-oriented and bit-oriented. a. Fixed-size b. Variable-size c. Standard d. None of the above 11: In a ________ protocol, the data section of a frame is a sequence of characters. a. bit-oriented b. character-oriented c. either (a) or (b) d. none of the above 12: In a _________ protocol, the data section of a frame is a sequence of bits.
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Data Link Control and Protocols - Data Link Control and...

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