Which layer of the OSI model handles error detection and correction?

Which layer of the OSI model handles error detection and correction?

• A. Application layer
• B. Transport layer
• C. Network layer
• D. Data Link layer

Answer: (D)

The Data Link layer is responsible for error detection and correction in the OSI model. This layer facilitates reliable communication between adjacent network nodes by providing mechanisms that can identify and correct errors that may occur during data transmission over a physical medium. When data is transmitted, it may become corrupted due to noise or other interference on the network. The Data Link layer adds a header and trailer to the data packets, which contain error-checking information. Popular methods used in this layer for error control include checksums, cyclic redundancy checks (CRC), and acknowledgment responses (ACKs). By ensuring that any corrupted frames are detected and can be either corrected or discarded, the Data Link layer plays a critical role in maintaining the integrity of data as it moves through a network. This distinct function is essential for preventing a chain of errors from propagating through higher layers of the OSI model, enabling reliable data transmission.

The Data Link layer is responsible for error detection and correction in the OSI model. This layer facilitates reliable communication between adjacent network nodes by providing mechanisms that can identify and correct errors that may occur during data transmission over a physical medium.

When data is transmitted, it may become corrupted due to noise or other interference on the network. The Data Link layer adds a header and trailer to the data packets, which contain error-checking information. Popular methods used in this layer for error control include checksums, cyclic redundancy checks (CRC), and acknowledgment responses (ACKs).

By ensuring that any corrupted frames are detected and can be either corrected or discarded, the Data Link layer plays a critical role in maintaining the integrity of data as it moves through a network. This distinct function is essential for preventing a chain of errors from propagating through higher layers of the OSI model, enabling reliable data transmission.