DOMAIN NAME SYSTEM
DNS is a hierarchical naming resolution service for TCP/IP. It is the primary name resolution
service used to navigate through the Internet and is also the primary name resolution
service used by Active Directory. Its function, first and foremost, is to translate host
or domain names into IP addresses. It can optionally be used to perform reverse lookups
where hostnames are resolved from IP addresses. Active Directory uses DNS in a special
way, in that it uses a particular record type called SRV records to locate key Active Directory
infrastructures such as domain controllers.
Chapter 4 covered some of the basics of DNS and Active Directory. Some new features
are specific to the DNS implementation in Windows Server 2008 and are covered in
this chapter. Windows Server 2008 DNS provides the following features out of the box:
?–? Active Directory Domain Services support Windows DNS is the DNS server
solution Microsoft recommends to support Active Directory Domain Services
(AD DS). Although technically you can use third-party DNS solutions that
support the SRV record types for your Active Directory, you will not be able
to take advantage of its tightly integrated features such as the ability to store
the DNS data in the AD domain or application partition. Windows DNS also
supports the ability to perform secure dynamic updates of DNS records by
clients participating in the domain.
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