control your domain

DNS - Domain Name Services

Domain Name Services is a heirarchical server database which contains host name to IP address static mappings.

DNS can be used to resolve NetBIOS names, but only when the box is checked to enable DNS for NetBIOS name resolution in TCP/IP properties in the Network configuration window.

A CNAME is a method of DNS aliasing. It is normally used to alias a server as www or ftp.

Windows NT is able to list up to three DNS Servers in its network properties.

If a DNS Server is queried, but is unable to resolve the host name, it will return a negative acknowledgement to the querying computer. The querying computer will then attempt another method of name resolution, rather than trying the other DNS Servers.

If a DNS Server is queried, but is unable to be located, the querying computer will then attempt to contact the next DNS Server in the list.

A DNS Server can be setup to be a zone transfer server. Zone transfer will allow the DNS Server to query other DNS Servers if it is unable to resolve the request.

  • Secondary DNS server - A Secondary DNS server uses Zone Transfers to collect the DNS database from it's Primary DNS Server.
  • Caching DNS Server - A Caching DNS Server does not maintain any static DNS records. All of it's records are created by resolving DNS queries to a Primary or Secondary DNS server. Caching DNS servers thus add redundancy to the DNS namespace.