-> DNS Server

A DNS server is a computer running the DNS Server service, or BIND; that provides domain name services. The DNS server manages the DNS database that is located on it. The DNS server program, whether it is the DNS Server service or BIND; manages and maintains the DNS database located on the DNS server. The information in the DNS database of a DNS server pertains to a portion of the DNS domain tree structure or namespace. This information is used to provide responses to client requests for name resolution. When a DNS server is queried for name resolution, it can respond to the request directly by providing the requested information, provide a pointer (referral) to another DNS server that can assist in resolving the query, or respond that the information is unavailable or that is does not exist. A DNS server is authoritative for the contiguous portion of the DNS namespace over which it resides.