A MAC address (Media Access Control address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. This allows a device to be uniquely identified on a network, facilitating data transmission and network management. MAC addresses are typically written as a string of 12 hexadecimal digits, separated by colons, for example, “00:11:22:33:44:55”.
MAC addresses play a crucial role in network communication, serving several essential functions. They ensure that data packets are delivered to the intended recipient by identifying the specific device on the network. Additionally, MAC addresses assist in network security measures, such as access control and intrusion detection. The unique nature of MAC addresses allows network administrators to manage and monitor devices connected to the network, facilitating troubleshooting and maintenance.