Which layer handles inter-network routing and logical addressing in the TCP/IP model?

• A. Application
• B. Transport
• C. Internet
• D. Network Access

Answer: (C)

Inter-network routing and logical addressing are handled by the Internet layer. This layer encapsulates data into IP packets, assigns logical addresses (IP addresses) to hosts, and handles routing between different networks. Routers operate at this layer, using IP headers to move packets toward their destination across multiple networks. The other layers serve different roles: the Application layer supports user-facing services, the Transport layer manages end-to-end delivery and ports, and the Network Access layer deals with delivering frames on the local network using hardware addresses. So, the Internet layer is the one responsible for routing across networks and assigning IP addresses.