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This article mainly introduces where the mac address is stored in the computer, the article is very detailed, has a certain reference value, interested friends must read it!

Mac addresses are usually stored on the "network card" of the computer. The network card belongs to the physical layer of the OSI model, which only transmits signals and does not analyze high-level data; the MAC address is unique in the world and is an address used to confirm the location of network devices, usually fixed on the network card of the computer.

Mac addresses are usually stored on the "network card" of the computer.

A MAC address (English: Media Access Control Address), literally translated as a media access control address, also known as a local area network address (LAN Address), MAC address, Ethernet address (Ethernet Address), or physical address (Physical Address), is an address used to confirm the location of network devices.

In the OSI model, the layer 3 network layer is responsible for the IP address, and the layer 2 data link layer is responsible for the MAC address.

MAC address is used to uniquely mark a network card in the network. If a device has one or more network cards, each network card needs and will have a unique MAC address.

The length of the MAC address is 48 bits (6 bytes) and is usually expressed as 12 hexadecimal digits. For example, 00-16-EA-AE-3C-40 is a MAC address, where the first 3 bytes, the hexadecimal number 00-16-EA represents the number of the network hardware manufacturer, it is assigned by the IEEE (Institute of Electrical and Electronic Engineers), and the next 3 bytes The hexadecimal number AE-3C-40 represents the serial number of a network product (such as a network card) manufactured by the manufacturer. As long as you don't change your MAC address, MAC address is unique in the world. Figuratively speaking, the MAC address is like the ID card number on the ID card, which is unique.

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