Which condition would prevent a vSphere Administrator from increasing the vCPU on a virtual machine to 128 vCPUs?

A vSphere Administrator has multiple virtual machines running on a VMFS datastore. Which option prioritizes the disk access for the virtual machines?

A host profile is created from a reference host in Cluster A and applied to all hosts in the same cluster.
What effect is expected when the administrator updates the DNS settings on the reference host?

An administrator is using vSphere Web Client to configure the firewall to allow specific third-party application SSH access to an ESXi Host.
What is the most secure way to configure the firewall rule?

A customer suspects someone or something is changing the MAC address of a virtual machine. Which security policy should the customer modify to obtain more information?