DNS is abbreviation of "Domain Naming Service". To do proper communications between computers, computers can be given names within a name space. The specific name space defines the rules for naming a computer, and for how names are resolved into IP addresses. When one computer communicates with other computers, it must resolve, or convert, a computer name into an IP address based on the rules of the name space being used. This resolution will be done by a name-resolution service.
There are two main name spaces, and name-resolution methods, used within Windows 2000: NetBIOS, implemented by Windows Internet Naming Service (WINS) and the DNS . Windows 2000 also provides support for other name spaces, such as Novell Netware and Banyan Vines, although discussion of these is outside the scope of this book.
More on DNS and the protocol used to provide name resolution
The DNS is an IETF-standard name service. The DNS service enables client computers on your network to register and resolve DNS domain names. These names are used to find and access resources offered by other computers on your network or other networks, such as the Internet. The following are the three main components of DNS:
- Domain name space and associated resource records (RRs) A distributed database of name-related information.
- DNS Name Servers Servers that hold the domain name space and RRs, and that answer queries from DNS clients.
- DNS Resolvers The facility within a DNS client that contacts DNS name servers and issues name queries to obtain resource record information.
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