CompTIA Network+ (N10-008) — Question 112

At the destination host, which of the following OSI model layers will discard a segment with a bad checksum in the UDP header?

Answer options

• A. Network
• B. Data link
• C. Transport
• D. Session

Correct answer: C

Explanation

The correct answer is C, as the Transport layer is responsible for handling UDP segments and will discard segments that have a bad checksum. The Network layer (A) is concerned with routing packets, the Data link layer (B) manages node-to-node data transfer, and the Session layer (D) establishes, manages, and terminates connections, none of which handle the UDP checksum directly.