What is an Active Directory Forest?

An Active Directory forest is the top most logical container in an Active Directory configuration that contains domains, users, computers, and group policies.

Active Directory Forest vs Domain - What's the Difference?

What is an Active Directory Forest?

Forest Design Models

Exploring the Active Directory Forest and Domain -- Microsoft Certified Professional Magazine Online

What is the Difference Between Forest and Domain

Active Directory Resource Center

Active Directory Users and Computers (ADUC): Installation and Uses

Can this Active Directory quiz stump you?

MCITP 70-640: Active Directory forest and trees

How to Raise Active Directory Forest Functional Level - Windows Active Directory

Hybrid deployments with multiple Active Directory forests