The caching-nameserver package includes the configuration files which will make
the ISC BIND named DNS name server act as a simple caching nameserver.
A caching nameserver is a DNS Resolver, as defined in RFC 1035, section 7.
ISC BIND named(8) provides a very efficient, flexible and robust resolver as
well as a server of authoritative DNS data - many users use this package
along with BIND to implement their primary system DNS resolver service.
If you would like to set up a caching name server, you'll need to install
bind, bind-libs, and bind-utils along with this package.