Automatic Repeat Request
Automatic Repeat Request (ARQ) is a protocol mechanism used in data communication and networking to ensure reliable data transmission over unreliable channels. It works by detecting errors or lost packets and automatically requesting retransmission from the sender. ARQ is fundamental in many communication protocols, including TCP, to maintain data integrity and flow control.
Developers should learn ARQ when working on network protocols, distributed systems, or any application requiring reliable data transfer, such as file transfers, streaming services, or IoT communications. It is essential for implementing error control and ensuring data consistency in scenarios where packet loss or corruption is common, like wireless networks or internet-based applications.