CompTIA A+ Core 1 (220-1201)Virtualization and Cloud ComputingHard
A systems administrator is planning to implement a new virtualization cluster. The administrator needs to ensure that if a physical host fails, the virtual machines running on it can automatically restart on another available host without significant downtime. What feature of virtualization management platforms addresses this requirement?
- ADistributed Resource Scheduler (DRS)
- BHigh Availability (HA)
- CStorage Area Network (SAN)
- DResource pooling
Show answer & explanationAnswer & explanation
Correct answer: B. High Availability (HA)
High Availability (HA) is a critical feature in virtualization clusters. It monitors the health of physical hosts and, in the event of a host failure, automatically restarts the affected virtual machines on another healthy host within the cluster. This minimizes downtime and ensures service continuity.
Why the other options are wrong
- A. DRS balances workloads across hosts but does not inherently provide automatic failover in case of a host crash.
- C. A SAN provides shared storage for VMs but does not manage the automatic restart logic itself.
- D. Resource pooling aggregates resources, but doesn't handle automatic failover.
High Availability (HA) in Virtualization
A feature in virtualization platforms that automatically detects physical host failures and restarts affected virtual machines on other healthy hosts within a cluster, minimizing downtime.
- Monitors physical host health.
- Automatically restarts VMs on failover.
- Requires shared storage for VMs.
Memory trick: For 'HA'ppy uptime, 'HA've High Availability.