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The primary functions of the network layer in networking protocols, particularly in the OSI model and TCP/IP model, include routing, addressing, packet handling, and error control among others. It is responsible for providing logical addressing, which routers use to select the best path for packet forwarding. Here are some key functions typically associated with the network layer:
1. Logical Addressing: Assigning unique identifiers to devices on the network for identification.
2. Routing: Determining the optimal path through the network from sender to recipient.
3. Packet Forwarding: Physically passing packets from their source toward their destination by hopping through routers.
4. Fragmentation and Reassembly: Breaking down large packets into smaller ones for transmission and reassembling them at the destination.
5. Error Handling and Diagnostics: Managing errors in transmission and providing network diagnostic capabilities.
Given these functions, “Add Answer to all the questions asked by the users” is not a function of the network layer. This phrase seems to refer to an instructional directive rather than to any networking concept.
D. none of the mentioned