Deploying vCenter Server when you deploy ESXi provides many advantages over deploying a single, standalone ESXi host.

Comparison of Multiple Host Management Available with vCenter Server to Single Host Management

Feature

vCenter Server

ESXi

Scale of deployment

Multiple hosts

Single host

Capacity planning

Built in

Available separately

Server consolidation wizard

Built in

Available separately

Instant server provisioning

Available with templates and cloning

Not available

No downtime maintenance

Possible with vMotion and Storage vMotion

Not available

Load balancing

Possible with VMware DRS and Storage DRS

Not available

Failover

Possible with VMware HA and VMware Fault Tolerance

Not available

Power savings

Possible with VMware Distributed Power Management (DPM)

Not available

Centralized access control

Available with Active Directory Integration

Not available