Answer / manish

GC is like an index for all the DC's in a forest with all
the AD information(objects, attributes etc). It is used to
authenticate UPN based logon request and Universal group
membeship. The Infrastructure master (operation master) is
used to check for the updated AD information with other
DC's in the forest, for this it queries the Global catalog
which has all the updated (replicated)information. If GC is
installed on all the DC's then the AD updates is not
identified by the DC's Infrastucture master as GC and
Infrastructure master are in the same DC.

You can look at schema by MMC snap in tool which is
registered by start->run->regsvr32 schmmgmt.dll

Answer / deepak rawat

there only can be one global catalog server IN A FOREST(GCS)
BY Default the first domain controller of active directory
forest act as GCS. It is used for communication in entire
forest. The Infrastructure master (operation master) is
used to check for the updated AD information with other
DC's in the forest, for this it queries the Global catalog
which has all the updated (replicated)information. If GC is
installed on all the DC's then the AD updates is not
identified by the DC's Infrastucture master as GC.by defaul
schema manangment tools is not present in administrator
tools we have to install it through command line. At
command promt run the following comm. "regsvr32
schmmgmt.dll"and after that go to run and type mmc.exe -
>mmc wizard open ->file ->add/remove snapin->add scehma
managment tools ->ok and finish. and save it .the support
tools is used for diagnoses tool for network connectivity
and many other function. we can install it from 2003 server
cd ->support tools -> suptool.exe run it and replmon is
used for monitoring replication traffic.netdom is
commandline tools for rename domain controller name.its
only work in windows 2003 server forestanddomain fuctional
level not in any other level.

Answer / gopi

As per the Microsoft it is not recommanded but we can make
the server which contains Infrastructure master role as a
Global catlog server.

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