Please note, some routers offer the option to change the MAC address the router broadcasts as to simulate your computer being directly connected. If they do, it can cause communication problems and confusion between the equipment that is trying to contact a device with a duplicated address. No two devices in the world should have the same MAC address. It is assigned to the device (the network card in your computer, your cable modem, even in some cases your mobile phone) by the manufacturer at the time it is built, and never changes. Additionally, the first two digits are almost always 00. It comes in the format 00:00:00:00:00:00.Īny individual character in a MAC address may have a value of 0-9 or A-F. A MAC address is a unique identifier for anything that can connect to a network, including the internet.
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