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

Creating a backup configuration is a crucial step before making changes to a vSphere Distributed Switch. This practice ensures that you have a restore point in case the changes lead to unexpected results or configuration issues. A backup allows administrators to revert to the previous state smoothly without significant downtime or disruption to network services.

This practice is important because distributed switches often facilitate network management across multiple hosts and virtual machines, and improper changes could impact connectivity and performance enterprise-wide. The ability to restore a working configuration mitigates risks when experimenting with new settings or troubleshooting.

The other options do not contribute to the precautionary measures required before modifying switch settings. For instance, resetting all vCPU settings does not relate to switch configurations and may affect virtual machine performance instead. Unplugging all active connections could lead to network interruptions, and increasing memory resources is irrelevant to switch configuration and does not prevent potential issues arising from configuration changes.