Requires complex buffering and ordering at the receiver. 4. Performance Considerations
) before needing an ACK. If a frame is lost, the receiver discards all subsequent frames, and the sender must retransmit all frames starting from the lost one. Better utilization than Stop-and-Wait. Cons: High retransmission overhead in poor channels. 3.3. Selective Repeat ARQ (SR) Requires complex buffering and ordering at the receiver
SR provides the best throughput in high-error rate scenarios. the receiver discards all subsequent frames
Only the specific lost or corrupted frame is retransmitted, rather than the entire window. Pros: Highly efficient utilization of bandwidth. protocol efficiency calculations
g., protocol efficiency calculations, equations) or a ? Do youg., mobile networks, satellite)?
Low throughput on links with high propagation delay, as the channel remains idle while waiting for ACKs. 3.2. Go-Back-N ARQ (GBN)