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Two neighbouring nodes (A and B) use a Go-Back-N protocol with a 3-bit sequence number and a window size of 4. Acknowledgments are cumulative. Assuming A is transmitting and B is receiving, in the figure below show the window positions for the following succession of events:
a) after A sends frames 0, 1, 2, 3 and before any acknowledgments from B are received
b) after A sends all new frames it is allowed to send following a successful reception of acknowledgment to frame 1
c) just after acknowledgment to frame 2 arrives (but before any more frames are sent) Use diagonal crosses to show sequence numbers of packets sent but not yet acknowledged, and circles to show sequence numbers of packets node A is allowed to send
Briefly write functionalities of different OSI layers? The OSI Reference Model includes seven layers. Basic functionality of each of them is as follows: 1. Physical Layer:
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The three phase of PPP session establishment are:- A. Link establishment phase B. Authentication phase C. Network layer protocol phase
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The most difficult representatives of shared memory programming models are thread libraries present in mainly of the modern operating systems. Some examples for thread libraries ar
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Store-and-forward switch The layer 2 switch accepts a frame on an input line, buffers it briefly, and then routes it to the appropriate output line. Cut-through switch
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