How does vCenter communicate with each other ESXi Server?
A.
vCenter periodically polls each ESXi server using a virtual machine port.
B.
A vCenter agent is added to each ESXi server as it is added to the vCenter inventory
C.
vCenter uses a Wake-on-LAN to access the local ESXi services.
D.
vCenter does not communicate directly with an ESXi server, it relies on administrative
involvement.
Explanation:
http://pubs.vmware.com/vsphere-50/topic/com.vmware.ICbase/PDF/vsphere-esxivcenter-server-501-host-management-guide.pdf(page 50)