Give one example where buffering out-of-order segments would significantly improve the throughput of a GBN protocol. Consider a scenario where Host A, Host B, and Host C are connected as a ring...

Give one example where buffering out-of-order segments would significantly

improve the throughput of a GBN protocol.

Consider a scenario where Host A, Host B, and Host C are connected as

a ring (i.e., Host A to Host B, Host B to Host C, and Host C to Host A).

Assume that Host A and Host C run protocol rdt3.0, while Host B simply

relays all messages received from Host A to Host C. Does this arrangement

enable reliable delivery of messages from Host A to Host C? Can Host B tell

if a certain message has been correctly received by Host A?