What Is a MAC Address Relating to Internet?

First, it is a good idea to let you know what MAC stands for which is Media Access Control. Each device has physical hardware information (called MAC address) to identify it on network interfaces.  Therefore, this gives the device the ability to connect to a network, which the Internet is nothing more than a large network.  The device has it assigned on a internal chip.  Moreover, since assigned internally to the device it is something the user cannot change.

Manufacturer Identifier

A unique identifier set from some manufacturers, obviously to identify the manufacturer.   To clarify, this identifier is the Organizationally Unique Identifier (OUI) within the MAC address.  Some well-known manufacturers OUI (although some manufacturers may have more than one) are as follows:

Cisco: 00-40-96

Nortel: 00-04-DC

Dell: 00-14-22

To clarify, a reason for it (or  MAC address) is to identify the device on a wireless network. To prevent unauthorized access to a network, the router only accepts devices specific to it.  For instance, if the IP changes, it still identifies the device. Furthermore, the address possibly used in data recovery to connect to a wireless device.

Finding it on Computers and other Devices

To find the it on Windows computer, enter ipconfig /all from a Command Prompt.  This will show quite a bit of information and more specifically the Physical Address label will list it.

Finding it on a Mac computer is a bit different with specific commands through the Terminal app.  Enter networksetup –listallhardwareports and this will show it under the Ethernet Addresses label.

To find it on iPad or iPhone, go to Settings in your devices home page.  In Settings, select About, and it will appear under the setting WiFi Address.

Once again, the manufacturer defines it and the end user cannot modify.

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