Which OSI layer would be most associated with routing packets through a network?

Which OSI layer would be most associated with routing packets through a network?

• A. Physical Layer (Layer 1)
• B. Data Link Layer (Layer 2)
• C. Network Layer (Layer 3)
• D. Transport Layer (Layer 4)

Answer: (C)

Routing packets through a network is determined by the layer that handles logical addressing and path selection. This layer uses IP addresses to determine the best path and forwards packets toward their destination, with routers making those forwarding decisions based on routing tables and protocols. In contrast, the data link layer manages frames between devices on the same local network using MAC addresses and doesn’t handle end-to-end routing. The physical layer covers the actual transmission of bits over the medium, while the transport layer focuses on end-to-end delivery, reliability, and port handling. So, crossing multiple networks and choosing routes is a network layer function.

Routing packets through a network is determined by the layer that handles logical addressing and path selection. This layer uses IP addresses to determine the best path and forwards packets toward their destination, with routers making those forwarding decisions based on routing tables and protocols. In contrast, the data link layer manages frames between devices on the same local network using MAC addresses and doesn’t handle end-to-end routing. The physical layer covers the actual transmission of bits over the medium, while the transport layer focuses on end-to-end delivery, reliability, and port handling. So, crossing multiple networks and choosing routes is a network layer function.