These parts are defined by the subnet mask that is assigned to the address. Every IPv4 address has a network portion and a host portion. Some websites always have the same IP address, called a Static IP Address. Years ago, you kept the same IP address on your computer, but now IP addresses are usually dynamically assigned. The IP address is a virtual address and it changes depending on the network your device connects to, or even every time you reboot your computer. (In case you were wondering, the 48-bit identifier has 281.5 trillion combinations, so you shouldn't be worried about duplicates.) Truth be told, we don't usually care about it - it works behind the scenes. Represented by a 12-digit, hexadecimal number, every device in the world has a unique MAC address. It's hard-coded to the network card from the manufacturer. Here are all the parts you need to know.Ī MAC address is a device's "physical" address. But most people don't realize there's a lot happening behind the scenes to get you there. What are MAC Addresses, IP Addresses, and Subnet Masks?
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