What is the NIC MAC address? How to modify the NIC MAC address

MAC (Medium/media Access Control) address is for the network card, the manufacturer in the production process, the network card in its EPROM burned in a group of numbers, this group of numbers, each net card is different, this is the MAC (physical) address of the network card. That is to say: A network card corresponds to a unique MAC address.

　　The difference between MAC address and IP address

The MAC address is used to define the location of the network device. In the OSI model, the third layer of the network layer is responsible for the IP address, and the second layer of the data link layer is responsible for the Mac site. Therefore, the IP address of a computer can be changed dynamically, and the MAC address is fixed (without replacing the NIC).

What's the effect of MAC address?

Because the MAC address of the NIC is globally unique, it is mainly used to identify the user in the network. For example:

ADSL Internet, telecommunications use it to charge, confirm that you are on the net, in the campus network, MAC address can also be used to identify users.

The official users of the campus network, their MAC address will be registered on the server side, if you are an illegal user, the server does not have your network card MAC address, so when you try to connect to the Internet, the server will immediately recognize you, prevent you connect to the network.

　　How do I see the MAC address of the NIC?

The following are ways to view MAC addresses under various operating systems:

Windows XP/VISAT/7 Use the ipconfig command to view the NIC MAC address

　　Can MAC address be modified?

Mobile wireless card also has a unique MAC address

Yes. Hardware modifications and software modifications can be made.

Hardware modification is the use of the network card manufacturers to modify the program to burn the network card EEPROM, this risk is very large, operation complex.

　　Non-hardware modifications:

Windows automatically reads the MAC address from the network card and stores it in the registry during the installation process. When the data is transmitted in the network, the packet sent from the NIC requires a source MAC address, which is read directly from the registry, rather than to detect the NIC. So as long as the registry to modify the MAC address, it is equivalent to "changed the network card (EEPROM) MAC Address" (of course, with professional hardware detection tool or can detect the real MAC address of the network card). So how do you modify the MAC address of the NIC stored in the registry? You can modify it manually or use software modifications.

Manual modification method. First, open Device Manager and locate the network adapter.

NIC in Device Manager

To modify the local network card MAC address for example, right-click, open the Network card property box.

Network card Properties

Then open the Advanced tab, find the Network address options, fill in the custom MAC address, save it.

MAC address defaults are not preset (not preset)

Software modification method. It is recommended to use Ryll MAC Editor. Use this small software can quickly modify the MAC address and can quickly recover, exempt from worry.

Note : More wonderful tutorials Please pay attention to the triple computer tutorial section, triple Computer office group: 189034526 welcome you to join