It is usually desirable to have a physically separate communications path for control information.
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Q13: Only one frame may be in the
Q14: The transmission medium between systems is referred
Q15: DLHC is a widely used data link
Q16: The initiation,maintenance,and termination of a sustained data
Q17: The receiver must be able to distinguish
Q19: It is necessary to impose a layer
Q20: The effect of ARQ is to turn
Q21: In the high level data link control
Q22: RR and RNR are examples of an
Q23: The flow control in which the destination
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