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Foundation Topics

Installing a Read-Only Domain Controller

Many companies are structured with a large, well-staffed head office plus smaller branch offices located in different cities served by the company. These branch offices often lack the security of the head office—for example, the branch office server might be located under the receptionist’s desk or in another location that could be accessed by outsiders. In addition, such offices rarely have an experienced individual onsite who is capable of day-to-day server administration. Such an office is an ideal location for using an RODC and helps to reduce total cost of ownership (TCO). Furthermore, such offices are generally connected to the head office with slow wide area network (WAN) links that might not always be available.

Use of RODCs also provides additional benefits in large, complex AD DS implementations. Unidirectional replication as utilized by RODCs reduces the performance load on bridgehead servers in head office sites, thereby helping to reduce TCO. In addition, RODCs in Windows Server 2008 R2 support the concept of read-only copies of data stored in Distributed File System (DFS) replicas. Branch office users receive read-only access to such data, thereby protecting the data from accidental corruption or deletion at branch office locations.


  

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