What status does the CVM monitor from a passive node?

The correct answer highlights that the CVM, or Cluster Virtual Manager, primarily monitors the status of the CVM on the active node from a passive node. This functionality is integral to maintaining the overall health and coordination within a clustered architecture, ensuring that both active and passive components remain in sync regarding their operational status.

By monitoring the active node's CVM status, the passive node can quickly react in the event of a failover, allowing for seamless continuity in service. This is particularly important in scenarios where high availability is critical, as it ensures that resources and services can be restored with minimal delay if the active node becomes unavailable.

In contrast, other factors mentioned, such as environmental conditions, availability of external files, and status of shared resources, may be monitored for overall system health but are not the primary focus of the CVM functionality in relation to responding to node states. This differentiates the role of the CVM in tracking and ensuring the readiness of the clustered environment, emphasizing the critical nature of node interactions in failover processes.