Overview
Network/Unplugged provides fast, robust file synchronization by employing "Delta Differencing and Compression technologies" where only the changes made to the file, and not the entire file, is transferred across the network in a compressed format.

Benefits of using Delta Technologies

• Increases the speed of synchronization and file backup over slow network connections such as dialup telephone lines.
• Dramatically reduces network bandwidth consumption.
• Delta Differencing reduces synchronization time by as much as 90-95%.
• Reduces remote access connection costs, reduces network traffic, and increases user productivity.

Network/Unplugged features three technologies for performing sub-file synchronization.
They are classified as

Block Level Differencing
In this method, the files being synchronized are broken down into blocks on the client side and the server side. A comparison is made of the blocks on both sides and the differences down to the block level are generated. These differences are then transferred during synchronization and backup.

Byte Level Differencing
In this method, the files being synchronized are compared and differences down to the byte level are generated. This method produces much smaller differences, which are then transferred to the file server during synchronization and backup.

Write Monitor Differencing
In this method, the changes or modifications made to the files by the applications modifying the files are logged. At the time of synchronization, and backup, the "writes" that have been logged are condensed by removing any duplicate "writes", compressed and transferred across the network. This method is the best method for Outlook .pst files, and Access Database files.

Comparison of Different Delta Synchronization
Technologies
The following table compares the various Delta Synchronization Technologies featured in Network/Unplugged.