View information about MAC-addresse in several ways. First of all, you can watch it on the packaging of the network card. If you have a laptop, the MACaddress can be specified on the label located at the bottom of the computer. But there are faster ways to look for the ID of the network card do not require the study of labels.
Open a command prompt: "start" - "All programs" - "Accessories" - "Command prompt". Type ipconfig/all and press Enter. In the opened list find the section "local area Connection", and "Physical address". This is the MAC-address of your network card, it has approximately like this: 00-26-22-71-F2-51.
To view the ID of the network card, you can use the standard Windows utility GetMac.exe. It should be run from the command line to do this, type: getmac/s localhost, and press Enter. At the beginning of the displayed row, you will see the MACaddress of the network card. This version works with Windows XP but is not applicable to Windows 7.
Is the address of the network cards the same? No, it is quite possible to change – this is true in the case that you need full anonymity. Open "start" - "control Panel" - "Network connections". Select the local area connection and view its properties. In the "General" tab, in the line "Connect using", click "Configure". In the column "Property" select "Network address" and specify the desired value. Don't forget that after restarting the computer returns the original network address.
If you are working with a Linux operating system, see MACaddress of your network card, you can use the ifconfig -a | grep HWaddr, it is necessary to execute it in the console. Change the network addressand is also possible via the console, login with administrator privileges and run the command ifconfig ethX hw ether xx:xx:xx:xx:xx:xx, where ethX is the name of the network interface, and xx:xx:xx:xx:xx:xx is the new MACaddress. For example, the command may look like this: ifconfig eth0 hw ether 00:00:00:00:00:00.