What term describes a set of techniques that prioritize certain types of network traffic?

What term describes a set of techniques that prioritize certain types of network traffic?

• A. Quality of Service (QoS)
• B. Link Aggregation Control Protocol
• C. Power over Ethernet
• D. VLAN tagging

Answer: (A)

Quality of Service describes a set of techniques that prioritize certain types of network traffic. It works by classifying traffic into categories (for example, voice, video, and best-effort), marking packets to carry priority information, and applying scheduling and shaping rules so higher-priority traffic is sent first or with reserved bandwidth. This reduces latency and jitter for time-sensitive applications like VoIP or video calls while less critical data can wait or use leftover bandwidth. LACP bundles multiple physical links to increase throughput and provide redundancy, not traffic prioritization. Power over Ethernet delivers electrical power over the cable to devices, not traffic management. VLAN tagging separates broadcast domains and can help apply QoS policies across segments, but the term that directly captures prioritizing traffic is Quality of Service.

Quality of Service describes a set of techniques that prioritize certain types of network traffic. It works by classifying traffic into categories (for example, voice, video, and best-effort), marking packets to carry priority information, and applying scheduling and shaping rules so higher-priority traffic is sent first or with reserved bandwidth. This reduces latency and jitter for time-sensitive applications like VoIP or video calls while less critical data can wait or use leftover bandwidth. LACP bundles multiple physical links to increase throughput and provide redundancy, not traffic prioritization. Power over Ethernet delivers electrical power over the cable to devices, not traffic management. VLAN tagging separates broadcast domains and can help apply QoS policies across segments, but the term that directly captures prioritizing traffic is Quality of Service.