Chapter 14. THE INTERNET ROAD MAP: DNS
The Domain Name System (DNS) is one of those quiet, behind-the-scenes services that doesn’t get half the attention it deserves. Although most users have never heard of it, DNS is what makes the Internet as we know it work. DNS, also called name service, provides a map between hostnames and IP addresses. Without DNS, your web browsers and email programs wouldn’t be able to use the nice and convenient hostnames such as www.cnn.com; instead, you’d have to type in a numeric IP address for each server you access. This would greatly reduce the Internet’s popularity. To most end users, a DNS failure is an Internet ...
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