Which layer of the OSI model is responsible for error detection and recovery?

The Data Link layer is responsible for error detection and recovery in the OSI model. This layer ensures that data transferred over a physical medium is free from errors and can be successfully received. It accomplishes this through mechanisms like checksums and cyclic redundancy checks (CRC) to identify and correct errors that may occur during transmission.

When data is sent from one device to another, the Data Link layer adds a header and a trailer to the packet being sent. These additions contain control information, which can include error detection codes. If an error is detected, this layer can request the sender to resend the data, ensuring reliable communication over the network segment.

In contrast, the Transport layer primarily manages end-to-end communication and data flow control between devices, while the Network layer is responsible for routing packets across multiple networks. The Application layer deals with user interfaces and high-level protocols, not directly with error detection or recovery during data transmission. Thus, the role of the Data Link layer in ensuring data integrity and reliable communication makes it the correct choice for this particular question.