A network engineer is designing an address plan based on network applications. Which application presents the greatest need for its own address block?

IP telephony endpoints and call servers must be identifiable as a distinct address block so that QoS policies (DSCP EF marking, priority queuing) and security policies (firewall rules, ACLs) can be applied consistently across the entire voice infrastructure. Without a dedicated block, voice traffic cannot be reliably prioritized end-to-end.

Management traffic is important but typically low-volume and not subject to the strict real-time delay and jitter constraints that drive the need for a separate dedicated address block.

Multicast already uses the globally reserved 224.0.0.0/4 address space, so it does not require a separately carved-out block within the organization's address plan.

Physical security systems (cameras, access control) benefit from segmentation but do not have the same real-time QoS sensitivity that mandates a dedicated address block.