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Network+ Training Guide by Mike Harwood, Drew Bird

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Understanding Fault Tolerance

  • Identify the purpose and characteristics of fault tolerance.

In networking, fault tolerance refers to the ability for a device or system to continue operating in the event of a failure. Fault tolerance should not be confused with disaster recovery, which is the ability to respond to and recover from catastrophic events with no loss of data and no loss of data availability.

In practical terms, fault tolerance involves ensuring that when network hardware or software fails, users on the network can still access the data and continue working with little or no disruption of service. Developing a strong fault-tolerant system that ensures continual access to data is not an easy task, and it involves attention to many details. ...

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