When designing a three-node, load-balanced application, a systems administrator must ensure each node runs on a different physical server for HA purposes. Which of the following does the systems…

Round-robin is a load balancing algorithm that distributes incoming requests across nodes, not a mechanism for controlling physical server placement of VMs.

Live migration moves a running VM from one host to another on demand but does not enforce an ongoing policy that keeps VMs separated across different physical servers.

An anti-affinity rule is a hypervisor-level placement policy that prevents designated VMs from running on the same physical host. By configuring this rule for all three application nodes, the administrator guarantees that a single host failure cannot take down more than one node, satisfying the HA requirement for physical separation.

Priority queues are used in network traffic management or process scheduling to prioritize certain traffic or tasks, not to control VM-to-host placement.