The MAC address (Media Access Control address) is a unique identifier assigned to network interfaces for communication on a physical network. It is a 48-bit address, typically represented in hexadecimal format as 12 hexadecimal digits grouped in pairs, separated by colons, for example, 00:11:22:33:44:55.
The MAC address is used to identify a specific device on a network and is essential for network communication. It is used by network switches and routers to forward data to the correct destination. Without a MAC address, a device would not be able to communicate on a network.