Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.

Replication is a strategy for automatically copying data to other systems for backup reasons or to make that data more accessible to people at other locations. Replication can also distribute data to multiple servers that can make that information available to multiple simultaneous users. A load-balancing scheme distributes incoming requests to an appropriate server. This is the concept of a clustered system and is often used for busy Web sites.

This topic continues in "The Encyclopedia of Networking and Telecommunications" with a discussion of the following:

• Mirroring
• RAID (redundant arrays of inexpensive disks)
• Fault tolerance
• Web replication
• File and directory replication
• Directory services replication
• LDAP Duplication/Replication/Update Protocols (ldup)
• NDS (Novell Directory Services) replication
• Microsoft Windows 2000 Active Directory multimaster replication
• Database Replication
• Message-based schemes
• Connection-based replication
• Microsoft's SQL Server replication model components
• Replication techniques
• Snapshot replication
• Transactiona replication
• Merge replication

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