4. CACHING NAMESERVER
Returns the answer if already known,
Otherwise searches for an authoritative server
which has the information.
Caches the result for future queries.
5. AUTHORITATIVE NAMESERVER
An authoritative name server is a name server
that gives answers in response to questions
asked about names in a zone.
An authoritative-only name server only returns
answers to queries about domain names that
have been specifically configured by the
administrator.
6. Caching NameServers
Where would you need them?
Directly on a workstation or server
In a Small Office / Home Office
On a corporate network
7.
8. DNSCACHE
dnscache maintains a limited-size cache of DNS
information, 1 megabyte by default.
Unlike BIND (which keeps growing), discards
older cache entries.
9. Powerdns
Lots of Backends:-
MySQL, PostgreSQL, Oracle, DB2,
OpenDBX,SQLite, BIND, LDAP, geo, pipe, etc.
Install a Zone Editor :-
PowerAdmin
WebDNS
ZoneAdmin
A webpage detailing its own stats.
10. BIND
The most widely used DNS software on the
Internet.
Widely documented
Can be used as a Caching nameserver