Which of the following is a feature of VMware high availability?

VMware High Availability (HA) is designed to provide automated restart of virtual machines (VMs) in the event of a host failure. When a physical server running VMs crashes or experiences a fault, HA will automatically power on the affected VMs on another host within the same cluster. This quick recovery mechanism minimizes downtime and improves the availability of critical applications by ensuring that workloads continue to run despite hardware failures.

The power-on process for VMs in HA is initiated without requiring manual intervention, making it a seamless solution for maintaining business continuity. This feature is vital for organizations that rely on the continuous operation of their services and need to minimize the impact of hardware issues.

The other options pertain to functionalities that are either not specific to VMware High Availability or are part of different VMware features. For instance, automatic VM migration refers to vMotion technology, which allows VMs to be moved live from one host to another without downtime. Resource allocation across datacenters deals with Distributed Resource Scheduler (DRS) capabilities that analyze resource usage and balance loads across different hosts. Snapshot creation involves backing up the state of a VM at a certain point in time, which aids in data protection and recovery rather than in high availability scenarios.