Which layer is responsible for routing addresses within the OSI model?

The Network Layer is responsible for routing addresses within the OSI model because it is specifically designed to handle logical addressing and routing of data packets across different networks. This layer determines the best path for data to travel from the source to the destination, employing protocols such as IP (Internet Protocol) to facilitate these operations.

In the OSI model, the Network Layer works to encapsulate data into packets and ensures these packets can traverse various interconnected networks, which involves managing the logical addressing and routing decisions needed for effective communication. This layer plays a critical role in ensuring that data can reach its destination, even if it has to pass through multiple intermediate nodes or routers along the way.

Other layers, such as the Transport Layer, typically focus on end-to-end communication and ensuring reliable transmission; the Session Layer manages sessions and controls the dialogues between computers but does not handle routing. The Application Layer interfaces directly with end-user applications and is not concerned with packet routing or addressing at the network level.