CompTIA Network+ (N10-008) — Question 603

Which of the following OSI model layers will ensure messages are transmitted to their destinations and no data is duplicated?

Answer options

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

Correct answer: D

Explanation

The Transport layer is responsible for ensuring reliable data transfer, which includes managing message delivery and preventing data duplication. The Session layer manages sessions but does not handle message delivery, the Data link layer is concerned with node-to-node data transfer, and the Network layer focuses on routing, not ensuring data integrity.