Network address is always configured on network interface card and is generally mapped by system with the MAC address (hardware address or layer-2 address) of the machine for Layer-2 communication. For example, let's take a network adapter with the MAC address "00-A0-C9-14-C8-29." The OUI (Organizational Unique Identifier) for the manufacture of this router is the first three octets ("00-A0-C9") is Intel corporation and the rightmost six digits represent the Network Interface Controller.Ī network address always points to host / node / server or it can represent a whole network.
The second half (24 more bits) of the MAC address represents the serial number assigned to the adapter by the manufacturer.Īs shown in the above diagram, MAC addresses are 12-digit hexadecimal numbers (48 bits in length or 6-byte binary number). These IDs are regulated by an Internet standards organization. The first half (24 bits) of the MAC address contains the ID number of the adapter manufacturer. MAC addresses are often considered permanent, but in some conditions, they can be changed.Ī 48-bit MAC address is represented as a string of six octets, "MM:MM:MM:SS:SS:SS". Sometimes, colons (:) are used instead of dashes (-). MAC addresses are expressed in hexadecimal notation. MAC addresses uniquely identify the adapter on the LAN. MAC addresses are linked to the hardware of the network adapters, hence they are also known as the "hardware address" or "physical address."
Media Access Control (MAC) address is a physical address that works at the data link layer of the OSI model.Ī MAC address is a 48 or 64-bit address associated with a network adapter. MAC address is provided by the chip maker while IP Address is provided by the Internet Service Provider. Both MAC Address and IP Address are used to uniquely identify a machine on the internet.
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