Hi Peter,
Forest:-One or more Active Directory domains that share the same class
and attribute definitions/schema(The set of definitions for the universe
of objects that can be stored in a directory), site and replication
information (configuration), and forest-wide search capabilities (global
catalog). Domains in the same forest are linked with two-way, transitive
trust relationships.
Trees:-A hierarchical representation of the folders, files, disk drives,
and other resources connected to a computer or network. For example,
Windows Explorer uses a tree view to display the resources that are
attached to a computer or a network.
Domains :-In Active Directory, a collection of computer, user, and group
objects defined by the administrator.
These objects share a common directory database, security policies, and
security relationships with other domains.
regards,
ssg MS-MVP
pronetworks.org