What are the three elements to a DFS topology?

What will be an ideal response?

The three elements are the namespace root, folder, and replication group. A namespace root is a main container (top-level folder) in Active Directory that holds links to shared folders that can be accessed from the root. After the namespace root is created, it is populated by shared folders for users to access. Folders are established in a level hierarchy and appear to be in one server location, although they can be on many servers. A replication group is a set of shared folders that is replicated or copied to one or more servers in a domain.