Which option best describes the "Hot Vault" availability method?

The "Hot Vault" availability method refers to configurations that maintain high availability and continuous access to critical data. This method often utilizes Cluster or Distributed Vault environments, which support load balancing and redundancy. In these setups, multiple instances work together to ensure data remains accessible, even in the event of a failure.

This architecture allows for seamless failover between nodes, which enhances reliability and minimizes downtime during maintenance or unexpected outages. It is particularly advantageous in environments where continuous access to data is essential, thereby providing a robust solution for organizations needing to safeguard their information without interruption.

The other options describe different backup or redundancy strategies that do not align with the continuous accessibility and immediate failover characteristics epitomized by the Hot Vault availability method. For instance, a secondary server alone lacks the proactive failover features of clustering, while tape backups are primarily intended for archival purposes rather than real-time access.