A-Network+ Chap Fault Tolerance and Disaster R

Fault tolerance refers to the ability of a system to continue functioning properly and provide uninterrupted services even in the presence of hardware or software failures.

Fault tolerance is crucial for ensuring high availability and reliability of critical systems. It helps prevent downtime and minimize the impact of failures.

Common techniques include redundancy, failover clustering, load balancing, and error detection and recovery mechanisms.

Disaster recovery refers to the processes and procedures implemented to restore a system or network to full functionality after a catastrophic event, such as natural disasters, cyberattacks, or equipment failure.

Fault tolerance focuses on maintaining continuous system operation in the face of individual component failures, while disaster recovery deals with recovering from larger-scale disruptions or catastrophic events.

A comprehensive disaster recovery plan typically includes risk assessment, backup and recovery strategies, communication plans, testing procedures, and identification of critical systems and data.

Testing helps ensure the effectiveness and efficiency of a disaster recovery plan. It helps identify potential gaps or weaknesses, allows for refining procedures, and provides confidence in the ability to recover from a disaster effectively.

Common backup strategies include full backups, incremental backups, differential backups, and snapshot backups.

Virtualization enables the creation of fault-tolerant and highly available virtual machines or systems. It also facilitates quick recovery through features like snapshots and live migration.

Best practices include conducting regular risk assessments, implementing appropriate redundancy measures, maintaining up-to-date backups, documenting recovery procedures, and regularly testing the disaster recovery plan.