Your company wants to test its disaster recovery plan by bringing critical systems online at an alternate site while the production environment continues normal operations at the primary site. The objective is to confirm that the alternate site can assume processing without disrupting business services. Which type of disaster-recovery test BEST meets this goal?
A parallel test activates recovery systems at the backup or alternate site while production systems remain live. Running both environments simultaneously lets the organization compare outputs and verify that recovery procedures, data integrity, and performance meet requirements, all with minimal risk of service interruption. A simulation test merely walks through procedures without running real workloads; a checklist/walkthrough test is even less rigorous; a full-interruption test actually shuts down production, creating the highest risk.
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