VMware Certified Professional - Data Center Virtualization (VCP-DCV) Practice Exam

Which feature of vSphere enhances the resiliency of virtual machines during failures?

1. Distributed Resource Scheduler

2. High Availability

3. Network I/O Control

4. Virtual Distributed Switch

The correct answer is: High Availability

High Availability is a critical feature in vSphere that significantly enhances the resiliency of virtual machines during failures. It ensures that VMs are automatically restarted on different hosts in the cluster if their current host fails or becomes unresponsive. By regularly monitoring the state of the hosts and the VMs, High Availability automatically detects a failure and triggers the failover process to maintain service continuity. This minimizes downtime and ensures that applications running on the virtual machines can continue to operate with minimal interruption. The other features, while important in their own right, serve different purposes. The Distributed Resource Scheduler manages resource allocation and load balancing among hosts to optimize performance but does not directly address machine failures. Network I/O Control focuses on prioritizing and managing network traffic but does not provide mechanisms for handling host or VM failures. The Virtual Distributed Switch enhances network performance and management across multiple hosts but does not contribute to the failover capabilities that High Availability provides. Hence, High Availability stands out as the primary feature that bolsters resiliency for virtual machines during failures.