A router uses what kind of address to send data to its destination?

Routers are OSI model Layer 3 devices. They preserve a chart with the IP address of the device connected to each port, whether that device is a computer or the external address of another router. A media access control (MAC) address is a network interface card's address (NIC). Memory addresses are used to identify where data is kept, and a loopback address is used to test TCP/IP on the local host. For IPv4, the loopback address is 127.0.0.1, while for IPv6, it is::1.