DNS

Standard Zone

Primary Zone

Only one read/write copy of data

Authoriative

Secondary Zone

Authorative

Read only

master can be Primary or secondary

Stub Zone

only records pointing to Authoritative servers

Reverse Lookup Zones

IP to FQDN mapping

Active Directory Intergrated Zone

Multiple Primary read/write (primary) copies of Zone Data

Fault Tolerent

All Domain Servers can host a Primary Zone

Cashing only servers

no zone, only cash previously resoved queries

Good to minimise NW traffic over a WAN

Host (A)

Most common

Can update dynamicly with XP, 2000 or server 2003

Forward or Reverse

Alias (CNME)

point to same host with 2 names

usefull if server is changed

Mail Exchanger (MX)

used by email apps to locate mail server

when specifying 2 or more, lower number is a higher priority

Pointer (PTR)

only used in Reverse lookup zones

Service location (SRV)

srv aware apps search for servers

AD is a SRV aware app

Recursive

Dns Server makes queries on Cilents behalf

Iteration

Client must query multiple servers for address