MCSE Boot Camp Notes :

3.3.4 DNS Zones

A zone is a contiguous portion of the domain namespace for which a DNS server has authority to resolve

DNS queries. You can divide the DNS namespace into zones, which store name information about one or

more DNS domains or portions of a DNS domain. For each DNS domain name included in a zone, the zone

becomes the authoritative source for information about that domain. To limit the number of DNS servers on

your network, you can configure a single DNS server to support, or host, multiple zones. You can also

configure multiple servers to host one or more zones to provide fault tolerance and distribute the name

resolution and administrative workloads. Multiple zones in a domain name space are used to distribute

administrative tasks to different groups. However, a zone must encompass a contiguous domain name space.

For example, you cannot create a zone that consists of only the studyguides.testking.com and

qae.testking.com domains, because these two domains are not contiguous – the studyguides and the qae

subdomains are independent of each other and can only be combined into a single DNS zone if the

testking.com domain is also included in the zone.

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