What is one characteristic of vSphere HA?

One characteristic of vSphere High Availability (HA) is its capability to restart virtual machines (VMs) automatically if their host becomes unavailable. This includes situations where the host has become isolated from the management network. vSphere HA monitors the health of hosts within a cluster, and in the event of a failure or isolation, it initiates a failover process that automatically restarts the virtual machines on other available hosts in the cluster. This feature is essential for maintaining uptime and minimizes disruptions to services running on those VMs, ensuring business continuity.

The other options describe functionalities that are not primary attributes of vSphere HA. While load balancing and resource contention are important aspects of vSphere Distributed Resource Scheduler (DRS), they are not part of the High Availability solution. Similarly, vSphere HA does not directly provide backup capabilities; instead, it focuses on uptime by restarting VMs. Additionally, while certain features in vSphere may require additional licensing, vSphere HA itself does not inherently require extra licenses specifically for its operation in production environments.