Which layer of the OSI model would manage error recovery during data transmission?

The Transport Layer is responsible for managing error recovery during data transmission, which is crucial for ensuring reliable communication between hosts in a network. It does this primarily through mechanisms such as end-to-end error detection and correction. When data is sent from one host to another, the Transport Layer can detect errors that may have occurred during transmission. If an error is detected, it can trigger retransmission of the affected segment, ensuring that the data received is accurate and complete.

In addition to error recovery, the Transport Layer is also responsible for flow control, segmentation, and reassembly of data, which further supports reliable communication. Protocols such as TCP (Transmission Control Protocol) operate at this layer, implementing these functionalities to provide a robust and reliable data transmission service.

While other layers, such as the Data Link Layer, also handle some aspects of error detection and correction within local network segments, the comprehensive error recovery across end-to-end connections is a defining feature of the Transport Layer.