Use_Namespaces:

The DFS Namespaces enables admins to group shared folders located on different servers.
The shared folders are presented to users as a virtual tree of folders known as a namespace.
A namespace increases the available data, shares the load, and helps migrate data.

DFS has folders. The directory tree is local to the network and not to a specific server.
Thus, a user can find the needed files and folders without browsing to a specific server or needing to map to a network drive from a workstation.

The DFS namespaces in wServer provide fault-tolerant access to files and folders on the WAN.
Replication is 'WAN-friendly'. DFS Replication is a state-based, multimaster replication engine that supports scheduling and bandwidth throttling.

DFS Replication uses a compression algorithm known as Remote Differential Compression (RDC).
RDC is a differential over-the-wire protocol used to update files over a limited-bandwidth network.
RDC detects insertions, removals, and rearrangements of data in files,
enabling DFS Replication to replicate only the (changes) when files are updated.

See 26.