A router MAC address (Media Access Control address) is a unique identifier assigned to a router’s network interface card (NIC). It is a 48-bit address, typically written in hexadecimal format, that identifies the router on a network. The MAC address is used to ensure that data is sent to the correct device on a network.
The MAC address is important for several reasons. First, it allows routers to communicate with each other and with other devices on a network. Second, it can be used to track the movement of devices on a network. Third, it can be used to troubleshoot network problems.