During setup of active directory, you have a few options. One is to be the root of a forest
"Domain Controller for a new domain" -click this for making childs, new domains or new forests
"Additional domain controller" - this will just be a "backup" so to speak
"Create a new domain tree" - ie: dissolved.com
"Create a child domain in an existing tree" - ie: software.dissolved.com ?
"Create a New forest" - this makes it a separate entity all together
"join an existing forest" - transitive trust is made automatically between the two domain trees. Users from domain A, can be authenticated in domain B
Is this correct?