Answer / md.niyajuddin

global catalog server is the first server in the forest
which contains all information of the domain, child domain,
sites information and all objects etc.

Answer / ahmed

It is better to have one global catalog server on each site
of AD to have fast access of the query which is asked by
the client.

GC has complete information of its own domain and partial
information of all other domains in the forest.

Answer / rsrushi

Global catalog server contains all information of objects
& attributes in host domain &
partial information of other domain.
It uses for search operation....

Answer / pradeep garg

Global catalog is first server at the first time of
installation, it contain complete information of own domain
and partial information of other domain. yes ofcourse, if
you have mutisite enviourment and user located in differnet
site and using low wan bandwidth, using another Global
catalog server, you can increase the login time and also
save the bandwidth, but it create the load on the
replication,so be care of it.

Answer / saif khan

Exchange server use global Catalog to lookup AD objects.
Becsae GC contain full index of AD objects.

Requirement of GC is depend on the mailbox load and need to
follow the exact ratio recomended by microsoft.
In exchange 2010. 4 MB Server : 1 GC ratio
8 MS server : 2 GC (only one GC require
if you have 64bit GC server).

Answer / raghavendra

the global catalog server is creating by default, first
domain in the forest. it will improve the respond time user
quary but only one global catalog servere is creating in
the forest not for all AD server but we can move the global
catalog from one server to another server

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