7. Consider a communication channel with a one-way propagation delay of 100 msec

Question

7. Consider a communication channel with a one-way propagation delay of 100 msec and transmission rate of 100 Mbps. There is no processing delay and the size of the ACK packets may be ignored. Answer each part below, making sure to show your computations (a) Find the round-trip delay-bandwidth product. (b) If the Go-Back-N protocol is to be used for the above channel with packet size of 1000 bytes what is the minimum window size1t (c) Suppose that 32-bit sequence n ust,beused to achieve 100% utilization? are used to transmit the 1000-byte long packets. If pack for the sequence numbers to wrap around, ets are transmitted conti y, how long does from 0 up to the maximum sequence num (d) Now suppose the 32-bit sequence numbers are used to count individual transmitted bytes. How long does it now take for the sequence numbers to wrap around? transmission rate is 1 Gbps and 10 Gbps respectively. There is no need to show your detailed computations for these two cases. Instead, display your ans Mbps, 1 Gbps, and 10 Gbps) ne ll three channels (with transmission rates of 100 table or each part of the question.

Explanation / Answer

Below is your answer

Time for the sequence number to wrap around (sec)

Byte Time * 232=4294967296*8/R seconds

The sequence number wraps around in much shorter time. At 1 Gbps the sequence number wraps around in only 34.36 seconds.

Bit Rate Mbps Round Trip Time (msec) 100 10 1 1 34359.74 34359.74 34359.74 10 3435.97 3435.97 3435.97 100 343.6 343.6 343.6 1000 34.36 34.36 34.36

Related Questions

Navigate

• Browse (All)
• Browse 7
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.