Which of the following descriptions about the disaster recovery solution in two places and three centers is correct? (Multiple choice)

Question

Options

• AWhen the entire production site fails, switch the active and standby status of the database, and
• BConfigurations, logs, snapshots, and backups generated by production and disaster recovery
• CThe business can be shared between the two regions through DNS, and the disaster recovery
• DWhen an AZ of the production site fails, the business system switches to another AZ, and the
• EDeploy RDS database instances in the production and disaster recovery centers respectively, and

• A
  77% (17)
• B
  23% (5)

Explanation

Disaster Recovery in Two Places and Three Centers

Options A, C, D, and E represent the core principles of a robust disaster recovery architecture. Option A correctly describes database failover when a production site is completely lost-you promote the standby database to active status. Option C is correct because DNS failover enables traffic routing between geographic regions based on availability, allowing seamless business continuity. Option D correctly addresses intra-region failover when a single Availability Zone fails, ensuring services shift to another AZ within the same region. Option E is correct because deploying RDS instances across both production and disaster recovery sites enables data replication and failover capabilities.

Option B fails because the statement is incomplete and vague-while configurations, logs, snapshots, and backups should indeed be replicated across sites, the option doesn't clearly express this as a requirement or characteristic of the solution.

Memory tip: Remember the three failover levels in this architecture-(1) AZ-level failover within a region, (2) region-level failover via DNS, and (3) database promotion when the primary site fails. All three must be properly configured for a complete disaster recovery strategy.

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