05 Jun Two computers are connected by an intercontinental
Question
1. Two computers are connected by an intercontinental link with a one-way propagation
delay of 100 ms. The computers exchange 1-Megabyte files that they need delivered in
250 ms or less. The transmission lines have a speed of R Mbps and the bit error rate is
10?8. Design a transmission system by selecting the bit rate R, the ARQ protocol, and
the frame size.
2. Write a program for the transmitter and the receiver implementing Stop-and-Wait ARQ
over a data link that can introduce errors in transmission. Assume station A has an
unlimited supply of frames to send to station B. Only ACK frames are sent from station B
to station A. Hint: Identify each event that can take place at the transmitter and receiver
and specify the required action.
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