Final answer:
The maximum window size for the Selective Repeat protocol using sequence numbers from 1 to 162 is 81. This is calculated as half the total range of sequence numbers, preventing acknowledgment ambiguity due to wrapping.
Step-by-step explanation:
The Selective Repeat protocol is used in data communications for controlling the flow of data between two network devices. It manages data transmission by assigning sequence numbers to the packets sent over the network. When using sequence numbers from 1 to 162, the maximum window size for the Selective Repeat protocol is determined by the number of sequence numbers available, as the protocol can recognize up to twice the range of sequence numbers before ambiguity occurs.
In this case, the range of sequence numbers is 162. Therefore, the maximum window size is half of the total number of sequence numbers, which is 81. This size ensures that each frame can be acknowledged individually and that the sender does not send too many frames ahead before receiving acknowledgments, thereby preventing ambiguity in the acknowledgments received due to the wrapping of sequence numbers.