Author Topic: What is an Ethernet or Wireless Hardware Address?  (Read 105 times)

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Offline CyborgRepublic

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What is an Ethernet or Wireless Hardware Address?
« on: October 11, 2008, 03:46:10 AM »
What is an Ethernet or Wireless Hardware Address?

An Ethernet or Wireless hardware address is a number assigned to the hardware interface in (or attached to) your computer or printer. It is assigned by the manufacturer of that Ethernet or Wireless interface, not by Princeton University. All manufacturers of Ethernet and Wireless interfaces cooperate to ensure that every hardware interface has a unique address.
If your computer has both an Ethernet interface and a Wireless interface, each will have its own unique hardware address.

An Ethernet or Wireless hardware address is a 6-byte hexadecimal number; for example: 0x080007A9B2FC. (Each byte is written as two hexadecimal digits, so there are twelve hexadecimal digits; each hex digit is a number from 0-9 or a letter from A-F. A leading \'0x\' may be written to make explicit that the following digits should interpreted as hexadecimal.)

http://www.net.princeton.edu/enetAddress.howto.html#whatis
Ethernet and Wireless hardware addresses are often written in other forms, to make them easier to understand. It is common to leave off the leading \'0x\', and also to separate the six pairs of digits with colons or dashes, like: 08:00:07:A9:B2:FC or 00-00-94-ba-0e-cc. When using colons or dashes to separate the address into six pairs, sometimes any leading zero in each pair of digits is dropped; e.g. 8:0:7:A9:B2:FC or 0:0:94:ba:e:cc. (Note that when dropping leadings zeroes, \'00\' becomes \'0\' -- you never completely eliminate any of the six pairs of digits.)

Do not confuse an Ethernet or Wireless hardware address with an Internet Protocol ("IP") address; that\'s a number assigned to some computers and printers by the Princeton University, and looks something like: 128.112.1.2 or 140.180.1.2. Your Ethernet or Wireless hardware address is also not your email address, which typically looks something like rfraggle@princeton.edu.

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What is an Ethernet or Wireless Hardware Address?
« on: October 11, 2008, 03:46:10 AM »

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