Which level of the TCP/IP five-layer model does a router operate on? The network layer The data link layer The application layer The transport layer

Answering the Question

1. Understanding TCP/IP Model Layers: The TCP/IP model consists of five layers: Application, Transport, Internet, Data Link, and Physical. Each layer has specific functions and protocols associated with it.

2. Role of a Router: A router's primary function is to direct traffic between different networks by using IP addresses. This involves determining the best path for data packets to travel from one network to another, which is a characteristic of the Internet layer.

3. Identifying the Correct Option:

   • The Network Layer: This is the Internet layer in the TCP/IP model, where routers operate by handling packet forwarding using IP addresses.
   • The Data Link Layer: This layer deals with node-to-node data transfer but does not include routing between networks.
   • The Application Layer: This layer deals with high-level APIs and the end-user interface, not with routing.
   • The Transport Layer: This deals with end-to-end communication but doesn't involve routing.

Final Answer

A router operates on The Network Layer.