Which layer of the OSI model is responsible for providing logical addressing?

The Network layer, which is Layer 3 of the OSI model, is responsible for providing logical addressing. This layer manages the delivery of packets across multiple networks, and it uses logical IP addresses to identify devices on the network. Logical addressing enables devices to communicate with each other even if they are on different networks, facilitating routing and ensuring that the packets reach their intended destinations.

The primary function of the Network layer is to analyze and route data packets based on their destination IP addresses, making it essential for inter-network communication. It also establishes the routes for data to travel between devices, making decisions on the best path across a complex web of interconnected networks.

In contrast, the other layers serve different functions: the Data Link layer focuses on physical addressing required for communication within the same network segment, the Transport layer is responsible for end-to-end communication and flow control, and the Session layer manages sessions between applications. Each layer has distinct responsibilities that contribute to the overall function of network communication, but only the Network layer handles logical addressing.