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Eleventh Hour Security+ by Ido Dubrawsky

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Redundant Systems

A single point of failure can be the Achilles' heel that brings down a system. High availability is a network’s ability to keep systems operating and services available in the event of an outage. How this is provided is through redundant systems and fault tolerance. Redundancy is a duplication of services and systems. If the primary method used to store data, transfer information, or other operations fails, then a secondary method is used to continue providing services. Fault tolerance refers to a systems ability to continue working in the event of such a failure. If one component stops working, it will fail over to another component.

Crunch Time

Don’t get confused between the terms high availability, redundancy, and fault ...

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