What are the support tool why do you need them?

Answer 1

Support Tools are the tools that are used for performing the complicated tasks easily. These can also be the third party tools. Some of the Support tools include DebugViewer, DependencyViewer, RegistryMonitor, etc.

-edit by Casquehead

I believe this question is reffering to the Windows Server 2003 Support Tools, which are included with Microsoft Windows Server 2003 Service Pack 2. They are also available for download here:

http://www.Microsoft.com/downloads/details.aspx?familyid=96A35011-FD83-419D-939B-9A772EA2DF90&displaylang=en

You need them because you cannot properly manage an Active Directory network without them.

Here they are, it would do you well to familiarize yourself with all of them.

Acldiag.exe

Adsiedit.msc

Bitsadmin.exe

Dcdiag.exe

Dfsutil.exe

Dnslint.exe

Dsacls.exe

Iadstools.dll

Ktpass.exe

Ldp.exe

Netdiag.exe

Netdom.exe

Ntfrsutl.exe

Portqry.exe

Repadmin.exe

Replmon.exe

Setspn.exe