Domain Name Service (DNS)
The Domain Name Service (DNS) is the phone book of the Internet. DNS is what gets you from xyz.com to 192.168.1.2. If you could only use numbers for Internet addresses, there are two things you could count on: The Internet wouldn't be nearly as popular as it is, and someone would shell out millions of dollars for the address 1.2.3.4.
Fortunately for everyone, the early designers of the Internet realized that it would be much easier to refer to hosts by name instead of address. Not only are they easier for humans to remember, the names also allow you to switch machines without reconfiguring other programs. For example, the popular news site http://www.slashdot.org has gone through several hardware upgrades over the past ...
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