MAC Address

A MAC (Media Access Control) address is a unique identifier assigned to a device that is connected to a network. It is a string of numbers and letters that is used to identify the device on the network, and it is typically assigned by the manufacturer of the device. A MAC address consists of six pairs of hexadecimal digits, separated by colons, and it is usually written in the format "00:11:22:33:44:55".

On a local area network (LAN), the MAC address is used to identify the device and determine which network packets should be sent to it. The MAC address is also used to identify the device on the Internet, although it is usually hidden behind a network address translation (NAT) layer that translates the device's MAC address into a public IP address.

The MAC address is an important aspect of networking, as it enables devices to communicate with each other and access network resources. It is also used for security purposes, as it can be used to restrict access to a network or to track the activity of a device on the network.