Domain Name System is the system used on the Internet for mapping of names, such as www.google.com, to IP Addresses such as 216.239.51.99. In many ways you can compare it to a phonebook. If you ...

What does email domain actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

The Internet is about to radically change, and hardly anyone knows it. Think about it like a phone system: The Internet operates on just a handful of top-level domains (TLDs) — like .com and ...