CCNA Routing and Switching (legacy) — Question 92

A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?

Answer options

• A. session
• B. transport
• C. network
• D. data link
• E. physical

Correct answer: D

Explanation

The correct answer is D, data link, because this layer is responsible for the error detection and correction of frames. The session, transport, network, and physical layers do not handle frame integrity in the same way as the data link layer does.