CompTIA Network+ (N10-008) — Question 298

At which of the following OSI model layers does routing occur?

Answer options

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

Correct answer: D

Explanation

Routing takes place at the Network layer of the OSI model, which is responsible for packet forwarding including routing through intermediate routers. The Data link layer handles node-to-node data transfer, the Transport layer is focused on end-to-end communication and reliability, and the Physical layer deals with the physical connection and transmission of raw bitstreams.