If you buy a new modem and try plugging it in, it will not work. These devices have a preset MAC address, and it is registered with your cable company. An IP address can also be set to “dynamic,” so it will change at set intervals.Ī common use of a MAC address that you may be aware of is a cable modem. This is in part due to the fact that the MAC address is pre-programmed into a device versus being assigned like an IP Address. Therefore, an IP address is referred to as a logical address, while a MAC address is known as a physical address. While a MAC address is used for local identification, an IP address helps the device communicate globally. If a device such as a computer accepts both wired and wireless connections, it will have a different MAC address for each. This number is used by both wired and wireless devices. It is designed to be a permanent network identifier for a device. What makes a MAC address unique is that it doesn’t change. A MAC address is required for nearly all network security protocols. The ability to distinguish a device on a network isn’t only important it is also to maintaining network security. A MAC address is a major part of computer networking.
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