September 2012
Intermediate to advanced
1680 pages
88h 3m
English
A zone in DNS is a portion of a DNS namespace that is controlled by a particular DNS server or group of servers. The zone is the primary delegation mechanism in DNS and is used to establish boundaries over which a particular server can resolve requests. Any server that hosts a particular zone is said to be authoritative for that zone, with the exception of stub zones, which are defined later in this chapter in the “Stub Zones” section. Figure 10.6 illustrates how different portions of the DNS namespace can be divided into zones, each of which can be hosted on a DNS server or group of servers.
Figure 10.6. DNS zones.
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