in.named and DNS Name Servers

As mentioned previously, name servers in an administrative domain maintain the DNS database. Name servers also run the in.named daemon, which implements DNS services. in.named is a public domain TCP/IP program and is included with the Solaris operating environment.

in.named is also called the Berkeley Internet Name Domain service, or BIND, because the daemon was developed at the University of California at Berkeley.

There are three types of DNS name servers.

• Master server

• Slave server

• Stub server

Each domain must have one master server and at least one slave server to provide backup. Implementing DNS explains primary and secondary servers in detail.