By default, each ESXi 6.x host is provisioned with a certificate from which root certificate authority?

By default, each ESXi 6.x host is provisioned with a certificate from which root certificate authority?

• Verisign Certificate Authority
• DigiCert Certificate Authority
• VMware Certificate Authority
• RedHat Certificate Authority 

EXPLANATION

In vSphere 6.0 and later, the VMware Certificate Authority (VMCA) provisions your environment with certificates.
This includes machine SSL certificates for secure connections, solution user certificates for authentication to vCenter Single Sign-On, and certificates for ESX hosts that are added to vCenter Server.

SOURCE

https://pubs.vmware.com/vsphere-60/index.jsp