Which method can a vSphere administrator use to move VMs to another portgroup experiencing high latency?

The correct method for moving VMs to another portgroup experiencing high latency is vSphere vMotion. vMotion is a feature that allows a virtual machine to be moved across hosts and networks while it is running, without any downtime. This capability is particularly useful in situations where a specific port group is experiencing performance issues like high latency. By using vMotion, an administrator can seamlessly migrate the VM to a different portgroup that may be functioning better, thereby improving the virtual machine's performance without interrupting its operation.

The other options relate to networking concepts or configurations but do not specifically facilitate the live migration of VMs due to network latency. For example, Network Port Binding deals with how ports are assigned to virtual switches, IP hash is a load balancing mechanism used in port groups, and Network I/O Control manages bandwidth allocation among VMs but does not directly move VMs between port groups. Thus, vSphere vMotion is the most appropriate and effective method for addressing high latency issues by relocating VMs to an alternate portgroup.