Analyzation of Automatic Repeat Request (ARQ) Protocols

Automatic Repeat Request (ARQ) protocols provide a widely recognized avenue for guaranteeing reliable transmissions over unreliable transmission of data. They are implemented in data link layer. The main functions of data link layer are data link control and media access control. Data link control ensures that the data is received at the destination side without any error and loss; by two mechanisms i.e. flow control and error control. Whereas Media access control is about how to share the link. The protocols are used in error and flow control mechanisms to ensure the reliability of the transferred data; they are divided into two Protocols for noiseless channel and Protocols for noisy channel.