![]() When a device wants to send data to another device on the network, it includes the MAC address of the destination device in the Ethernet frame. ![]() The MAC address is used by Ethernet networks to ensure that data packets are delivered to the correct destination. It is used at the data link layer (Layer 2) of the OSI model and is primarily responsible for the communication between devices on the same network segment. The MAC address plays a crucial role in network communication as it serves as a unique identifier for devices within a local area network (LAN). The MAC address consists of six sets of two hexadecimal digits, separated by colons or hyphens. It is a hardware address that is associated with the physical network adapter or network interface card (NIC) installed on a device. In Linux, a MAC address (Media Access Control address) is a unique identifier assigned to a network interface.
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