ISC2 CISSP Practice Question

Quality of Service (QoS) is the correct answer because it provides mechanisms to prioritize network traffic based on application requirements. QoS allows organizations to classify and prioritize traffic, ensuring that business-critical applications receive the necessary bandwidth while limiting resources for less important services. This approach directly addresses the scenario's requirement to prioritize critical application traffic while managing bandwidth consumption for other services.

Traffic analysis would help identify the congestion patterns but doesn't implement any prioritization mechanisms. Network segmentation separates networks logically but doesn't necessarily prioritize traffic between segments. Increasing bandwidth capacity would be costly and doesn't address the prioritization needs - it simply adds more resources that could still be consumed inappropriately without proper traffic management.