In the described model, which layer is responsible for routing data to its destination?

In the described model, which layer is responsible for routing data to its destination?

• A. Network Layer
• B. Transport Layer
• C. Data Link Layer
• D. Application Layer

Answer: (A)

Routing data to its destination is handled by the Network Layer. This layer provides logical addressing (such as IP addresses) and uses routing protocols and routers to forward packets along the best path across multiple networks. The Transport Layer, by contrast, focuses on end-to-end communication between hosts (reliability, flow control, segmentation) but doesn’t route packets between networks. The Data Link Layer handles delivery between adjacent nodes on the same network segment using MAC addresses, while the Application Layer is about providing network services to applications and does not perform routing.

Routing data to its destination is handled by the Network Layer. This layer provides logical addressing (such as IP addresses) and uses routing protocols and routers to forward packets along the best path across multiple networks. The Transport Layer, by contrast, focuses on end-to-end communication between hosts (reliability, flow control, segmentation) but doesn’t route packets between networks. The Data Link Layer handles delivery between adjacent nodes on the same network segment using MAC addresses, while the Application Layer is about providing network services to applications and does not perform routing.