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Q. Illustrate Stop-and-Wait Automatic Repeat request?
- Simplest flow as well as error control mechanism
- The sending device keeps a duplicate copy of the last frame transmitted until it receives an acknowledgement
- Frames signifies alternately numbered as 0 and 1
- ACK for frame0 = ACK 1 and for frame1= ACK0
- Out of order frames as well as erroneous frames are discarded and no ACK is sent
- Timers
- Control Variables
Many instance of IGRP run on one physical router
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Q. Example of go back - N protocol? The window size is 4. A sender has sent frame 6 as well as the timer expires for frame 3 (frame 3 not ACKn'd). The sender goes back as we
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Q. Explain Stop--and--Wait automatic repeat request? 1. Numbering frames prevents the retaining off duplicate frames. 2. Numbered acknowledgement are needed in case of delay
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Why do we require to subtract two from number of hosts?
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