Having spent the last two chapters learning the basics of UDP and TCP, the two major data transports available on IP networks, it is time for us to step back and talk about two larger issues that need to be tackled regardless of which transport you are using. In this chapter, we will discuss the topic of network addresses and will describe the distributed service that allows names to be resolved to raw IP addresses.
Before we plunge into this topic, we should get a few terms straight that will play a big role in the discussion that follows.
Top-level domain (TLD): These are the few hundred strings like
com, net, org, gov, and
mil that, together with country codes like
uk, form the ...