What is the association between site, OU, domain, tree, forest

Hi I am a little bit confused with the definition of OU, site, domain, tree,
forest. Can anyone please tell me whether I am corrent:
1. 1 Site must have at least 1 Domain Controller (DC)
2. 1 OU must have at least 1 DC
3. How come username can't be unique in the same OU however it is possible
to have same username in different OU. Isn't that going to cause confuseness
to the user who wants to loggon to the computer in the domain.
4. Two computer dev1.microsoft.com and dev2.microsoft.com. They are in the
same domain tree. because dev1 and dev2 must always be followed with
microsoft.com. However in here I am confused with forest. Is microsoft.com
and java.com two different domain tree but they are in the same forest ???.
5. If they are isn't that the com is also considered as parent domain name.
If that's the case then forest is actually also a tree.

Please anyone explain to me about this because I don't have any book and I
study everything for MCSE server exam by my self and using info from
Internet

Thanks

 

The key to avoiding confusion regarding similar users is the
allocation of U P Ns User Principal Names.

Here's a good primer
http://www.microsoft.com/technet/prodtechnol/windows2000serv/default.asp
on depploying 2000 server.



================================
My Hero:
http://www.theregister.co.uk/content/30/index.html
(remove vroomfondle to email me)
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Wooah, what a confused state you seem to be in!

Free study guides :
www.examnotes.net
www.cramsession.com

Look at the guides for 70-216, 70-217 and 70-218.
Read them all and you should have a much better understanding

 

Hi Triandy,

(Someone else posted a link to info on UPNs, so I'll skip that question.)
The first domain that you create in Active Directory is the root of that
forest, even though it's only one domain to start with. Let's call it
root.com.

You create a second domain - you specify if that domain will be a child to
root.com, forming a tree (child.root.com) or you specify to start another
tree (second.com). If you specify to start another tree, you can choose to
create the second tree in the existing forest or in a new forest.

Within any of the domains in your forest, you can create an organizational
unit (OU) structure. You must have at least one domain controller in each
domain; you do not require a domain controller in an OU. When you create a
domain, a default organizational unit for domain controllers is also
created. You should keep your domain controllers in this organizational
unit.

Sites are defined by IP subnets. You decide whether to place a domain
controller (or more than one) in a site based on your network requirements
and most sites should have a domain controller, however a site does not
require a domain controller.

These are simplified answers; you should read the documentation on Active
Directory for a better understanding:
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/ad/default.asp