Which of the following statements is true about HashiCorp Vault's architecture?

HashiCorp Vault's architecture is designed for flexibility and resilience, making it capable of being deployed in a high-availability configuration. This feature ensures that multiple instances of Vault can work together to provide redundancy and failover support, which is essential for maintaining service continuity and minimizing downtime in production environments.

In a high-availability setup, multiple instances share the same backend storage and can access secrets simultaneously while maintaining data consistency. This setup allows for load balancing and automatic failover, meaning that if one instance goes down, others can continue to serve requests without interruption. High availability is crucial for organizations that rely on Vault for secure secrets management and cannot afford service disruptions.

Other statements do not accurately characterize Vault's architecture: it does not depend solely on internal mechanisms without the option for external identity providers, it does not require a direct internet connection for operation as it can be deployed in isolated environments, and it supports various storage backends beyond just local encrypted storage. This versatility allows Vault to be integrated into diverse infrastructure scenarios while maintaining strong security and availability standards.