A corporate network includes a single Active Directory Domain Services (AD DS) domain
and two AD DS sites.
The AD DS sites are named Toronto and Montreal. Each site has multiple domain
controllers.
You need to determine which domain controller holds the Inter-Site Topology Generator role
for the Toronto site.
What should you do?

A.
Use the Active Directory Sites and Services console to view the NTDS Site Settings for
the Toronto site.

B.
Use the Ntdsutil tool with the roles parameter.

C.
Use the Ntdsutil tool with the LDAP policies parameter.

D.
Use the Active Directory Sites and Services console to view the properties of each
domain controller in the Toronto site.

Explanation:
http://technet.microsoft.com/en-us/library/cc794776.aspx
Determine the ISTG Role Owner for a Site

The Intersite Topology Generator (ISTG) is the domain controller in each site that is
responsible for generating the intersite topology. If you want to regenerate the intersite
topology, you must determine the identity of the ISTG role owner in a site. You can use this
procedure to view the NTDS Site Settings object properties and determine the ISTG role
owner for the site.
To determine the ISTG role owner for a site
1. Open Active Directory Sites and Services.
2. In the console tree, click the site object whose ISTG role owner you want to determine.
3. In the details pane, right-click the NTDS Site Settings object, and then click Properties.
The current role owner appears in the Server box under Inter-Site Topology Generator.