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Chapter 18. Protecting Network Data > Working with Uninterruptible Power Suppli...

Working with Uninterruptible Power Supplies

One other fault-tolerance strategy that we should take a look at involves the use of an uninterruptible power supply (UPS). A UPS is a device outfitted with some type of battery that can supply temporary power to a server when there is a power failure. Many UPS devices will also offer surge protection; this will help protect an important device from any voltage surges that may occur during an electrical storm or other power surge problem.

A UPS sits between a server and an electrical outlet. The UPS is plugged into the electrical outlet, and the server is plugged into the UPS. Because the UPS is a peripheral device, it also connects to the computer via a serial cable or a UPS port. The serial cable used is not your typical serial communications cable and will be included with the UPS.


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