Windows Server 2008 introduced the read-only domain controller feature, which allows a read-only copy of Active Directory to be placed in less secure environments such as branch offices. Windows Server 2008 R2 introduces support for read-only copies of information stored in Distributed File System (DFS) replicas, as illustrated in the following figure.
Figure 34: Read-only DFS in a branch office scenario
Read-only DFS replicas helps protect your digital assets by allowing branch offices read-only access to information that you replicate to the offices by using DFS. Because the information is read-only, users are unable to modify the content stored in read-only DFS replicated content and thereby protects data in DFS replicas from accidental deletion at branch office locations.
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