The Need for DNS
Domain Name Services (DNS) enable us to use human-friendly names for our computers. Even though the network uses numbers to identify each machine on a network, DNS enables people to think of computers in terms of names; the DNS service then maps those names to numeric addresses. DNS is used only with the Internet Protocol (IP).
DNS is critical to Active Directory (AD) because it is used to find Domain Controllers (DCs) and services on Domain Controllers such as Lightweight Directory Access Protocol (LDAP), Kerberos, and the Global Catalog. When a client needs to authenticate, it issues a DNS request for a nearby Active Directory Domain Controller. The DNS server then replies with the IP address and other information about the ...
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