IP address is used to route data around the TCP part allows Internet applications to Application I communicate over the network Router Router Application 2 Application I Router Router Application 2 Network Data Link Physical! A router routes with the network address (such as the IP address) 66 Router Router Router Router Network Data Link Physical A router routes with the network address (such as the IP address) Application 1 Application 2 Application 1 Application 2 IP address is used to route data around the Internet TCP part allows applications to communicate over the network