DNS Components and General Functions
To meet the many objectives set for it by its designers, DNS requires a great deal of functionality. It is a true name system with the emphasis on system, and as such, is considerably more complex than the host table name system used earlier in TCP/IP. In Chapter 50, I divided the many tasks of a full-featured name system into three categories. DNS includes functions in all of these categories, and so using these categories is a good way to take a high-level look at the way DNS works (see Figure 52-1).
Figure 52-1. DNS functions DNS consists of three main functional categories: name space, name registration, and ...
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