GATE 2023 Computer Networks 49

Which of the following statements is correct about the sender and receiver sliding window protocol?

What is the sender window size in the Selective Repeat and GoBackN sliding window protocol where n represents the sequence bit?

A 1Mbps satellite link connects two ground stations. The altitude of the satellite is 36,504 km and speed of the signal is 3 × 10⁸ m/s. What should be the packet size for a channel utilization of 25% for a satellite link using go-back-127 sliding window protocol? Assume that the acknowledgment packets are negligible in size and that there are no errors during communication.

A channel has a bit rate of 4 kbps and a one-way propagation delay of 20 ms. The channel uses a stop and wait protocol. The transmission time of the acknowledgment frame is negligible. To get a channel efficiency of at least 50%, the minimum frame size should be?

Suppose a channel implements SR protocol and has a bandwidth of 512 Kbits/second. We need to send a packet which is of size 1 KB. If transmission delay is 24ms then minimum number of bits required for the sequence number so that we can achieve 80% utilization?

The minimum number of bits that are required to represent sequence number in a sliding window protocol that is using the channel of 1 .72 Mbps and carries a packet of size 256 bytes with a one-way delay of 2 .56 msec?