Locating the MAC Address

The first step in providing a fixed address, at least when using the MAC address approach described here, is to locate the DHCP client's MAC address. For Ethernet devices, this address is a 6-byte number that's usually expressed in hexadecimal (base 16), typically with colons, dashes, or some other punctuation separating bytes. You can locate the MAC address in several different ways:

Hardware Stickers Some network interface cards (NICs) have stickers affixed to them with MAC addresses. Similar stickers may exist on the external case of computers that ship with built-in Ethernet interfaces, such as some laptops. Locating the MAC address in this way is straightforward if you haven't yet installed the NIC, but it may not be convenient if it's already buried inside a computer. Many NICs also lack this sticker.

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