2V0-21.23 Question 49
Single answerA company has implemented VMware vSphere High Availability (HA) in its data center to ensure virtual machine availability. One of the ESXi hosts in the cluster has unexpectedly failed. Which component or mechanism in vSphere HA is responsible for restarting the virtual machines from the failed host on the surviving hosts?
- A
Admission Control
- B
Fault Domain Manager
- C
VM Monitoring
- D
Fault Tolerance
Show answer and explanation
Correct answer: B
Explanation
vSphere HA uses the Fault Domain Manager as the core mechanism to monitor ESXi hosts and virtual machines. In the event of a host failure, the Fault Domain Manager ensures that the virtual machines from the failed host are restarted on surviving hosts in the cluster. While other components like Admission Control and VM Monitoring are part of the vSphere HA ecosystem, they serve different purposes and are not directly responsible for the failover process.
- A. Incorrect.
Admission Control is a policy used to ensure there are enough resources reserved in the cluster for HA to restart virtual machines. However, it is not the mechanism that actively restarts the VMs during a host failure.
- B. Correct.
Fault Domain Manager is the core vSphere HA component responsible for managing the failover process and restarting virtual machines from the failed host on surviving hosts.
- C. Incorrect.
VM Monitoring is a feature of vSphere HA that monitors the guest operating system within a virtual machine and restarts it if a failure is detected, but it is not responsible for handling host failures.
- D. Incorrect.
Fault Tolerance is a separate feature in VMware vSphere that provides continuous availability for virtual machines by maintaining a secondary VM. It is not part of the HA mechanism responsible for restarting VMs during a host failure.