MAC address (short for Media Access Control) is the physical address associated with the communication interface that connects a device to a network.
MAC address is unique and no two identical MAC addresses. So, it’s used to control network access. His identification is recorded directly in the memory ROM of the network adapter hardware, so there’s no way to change.
Addressing MAC is standardized by IEEE 802 model, responsible for defining the layers Protocols 1 and 2 (physical layer and data link) of the OSI model. Remember that the physical layer is responsible for encoding and decoding of broadcast signals and the physical layer is the transmission media.
See also: original publication.
HOW IS FORMED THE MAC ADDRESS?
It consists of a set of 6 bytes divided by a colon (:). Each of these bytes is represented by a hexadecimal number (0 to F), as in the example below:
The first three bytes (in the above case, 34: 64: A9) are intended to identify the manufacturer and the last three (in our case, 00:59:49) to identify the board model. Thus, it’s possible to know the manufacturer and model of the product used.
HOW TO LOCATE THE MAC ADDRESS ON MY COMPUTER?
If you use Windows:
- Open the command prompt;
- Enter the command: ipconfig /all
- Look for the line:
Physical Address ……..: 34-64-A9-00-59-49
If you use Linux:
- Open the terminal;
- Enter the command: ifconfig -a
- Search by line:
HW Address ……. : 34-64-A9-00-59-49
That’s all, folks! Later, we spoke more broadly of the MAC address and its composition.
Texto: Esdras Nunes. Powered with Google Translate help.