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Domain Name System

DNS is a hierarchical client/serverbased distributed database management

system. The purpose of the DNS database is to translate Computer names into IP

addresses. When a user enters a domain name in an application, the DNS

service maps the name to an IP address. If you are using the Active Directory.

directory service, you must implement DNS.

The DNS naming system maps names to corresponding numbers, and is

organized in a hierarchical fashion to enable scalability to large systems.

Individuals within the same city codę must have a unique phone number.

Individuals in other cities can have a duplicate telephone number if the city

codes are uniąue. Individuals in different countries can use the same city codę

and telephone number if the country codę is uniąue. Similarly, a host name can

be duplicated if some portion of the domain name is uniąue.

Each Computer that Stores the domain name. to.IP address mapping records has

mappings for only its area. These computers, known as DNS servers, only

process ąueries for computers located in their respective areas. As the mappings

in the area change, DNS servers can be updated automatically

with the new

information.