tanenbaum

Question

Consider the operation of Selective Repeat  over a 1-Mbps perfect (i.e., error-free) line. The
maximum frame size is 1000 bits. New packets are generated 1 second apart. The
timeout interval is 10 msec. If the special acknowledgement timer were eliminated,
unnecessary timeouts would occur. How many times would the average message be
transmitted?

Comments

time to send a single pakcet -= 1msec

timeout interval is 10msec

so,though RTT is nt given,if we assume propagation time to be same as transmission time,so we will recieve the acknowledgment before timeout occurs .

but packets are generated at the rate of 1 per second .i.e 1 per 1000 msec.

Answer 1

 2 Times  it will send