Which layer of the OSI model is responsible for error detection and correction?
Correct answer: B. data link layer
- A. physical layer
- B. data link layer
- C. network layer
- D. transport layer
Explanation
The Data Link Layer of the OSI model is primarily responsible for error detection and correction. It accomplishes this using techniques like Cyclic Redundancy Check (CRC), where a checksum is calculated for the data and appended to the packet. The receiver recalculates the checksum and compares it to the received value. If they mismatch, an error is detected, and the packet can be retransmitted.
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