Go-Back-N ARQ

Go-Back-N ARQ (Automatic Repeat reQuest) is a method used in computer networks to ensure reliable data transmission. In this system, a sender can send multiple packets of data without waiting for an acknowledgment for each one. However, if an error occurs with one packet, the sender must go back and resend that packet and all subsequent ones. This ensures that all data is received correctly, but it can be inefficient if errors are frequent, as it may require resending large amounts of data instead of just the problematic packet.