Your network contains three Active Directory forests named Forest1, Forest2, and Forest3.
Each forest contains three domains. A two-way forest trust exists between Forest1 and
Forest2. A two-way forest trust exists between Forest2 andForest3.
You need to configure the forests to meet the following requirements:
Users in Forest3 must be able to access resources in Forest1
Users in Forest1 must be able to access resources in Forest3.
The number of trusts must be minimized.
What should you do?
A.
In Forest2, modify the name suffix routing settings.
B.
In Forest1 and Forest3, configure selective authentication.
C.
In Forest1 and Forest3, modify the name suffix routing settings.
D.
Create a two-way forest trust between Forest1 and Forest3.
E.
Create a shortcut trust in Forest1 and a shortcut trust in Forest3.
Explanation:
MS Press – Self-Paced Training Kit (Exam 70-640) (2nd Edition, December 14 2012) page
639:
Forest Trusts
(…)
You can specify whether the forest trust is one-way, incoming or outgoing, or two-way. As
mentioned earlier, a forest trust is transitive, allowing all domains in a trusting forest to trust
all domains in a trusted forest. However, forest trusts are not themselves transitive. For
example, if the tailspintoys.com forest trusts the worldwideimporters .com forest, and the
worldwideimporters.com forest trusts the northwindtraders.com forest, those two trust
relationships do not allow the tailspintoys.com forest to trust the northwindtraders.com forest.
If you want those two forests to trust each other, you must create a specific forest trust
between them.