DNS Resource Records in Windows 2003

DNS Resource Records in Windows 2003

It all started with Host records.  In the beginning there were just flat text files with a list of servers and corresponding IP addresses.  When that got cumbersome and a pain to update, a proper database called DNS (Domain Name System) was invented by Paul Mockapetris in 1983.

Since then the DNS types of records have grown, here is list:

Type of Record

What it does

A (Host)

Classic resource record.  Maps hostname to IP


Maps IP to hostname (Reverse of A (Host)

Found in Reverse Lookup Zone


Canonical name, in plain English an alias.


Identifies DNS name servers.  Important for forwarders


Mail servers, particularly for other domains.  MX records required to deliver internet email.


Required for Active Directory.  Whole family of underscore service records, for example, gc = global catalog.  dc = domain controller. 


Make a point of finding the Start of Authority (SOA) tab at the DNS Server.

Custom / Special

It is possible to create more records in the DNS manager.  However I would only do this in extreme circumstance, e.g. Following a TechNet article.

Guy Recommends:  A Free Trial of the Network Performance Monitor (NPM)Review of Orion NPM v12 v12

SolarWinds’ Network Performance Monitor will help you discover what’s happening on your network.  This utility will also guide you through troubleshooting; the dashboard will indicate whether the root cause is a broken link, faulty equipment or resource overload.

Perhaps the NPM’s best feature is the way it suggests solutions to network problems.  Its second best feature is the ability to monitor the health of individual VMware virtual machines.  If you are interested in troubleshooting, and creating network maps, then I recommend that you give this Network Performance Monitor a try.

Download your free trial of SolarWinds Network Performance Monitor.

Purpose of Resource Records

Without resource records DNS could not resolve queries.  The mission of a DNS Query is to locate a server that is Authoritative for a particular domain.  The easy part is for the Authoritative server to check the name in the query against its resource records.


Take the time to investigate DNS Resource Records.  Understand which are created automatically, for example _SRV records, and which you need to create yourself, for example MX records for Exchange.

If you like this page then please share it with your friends


Related DNS Server topics