Which term is used to describe ensuring network traffic is prioritized to meet performance requirements?

Which term is used to describe ensuring network traffic is prioritized to meet performance requirements?

• A. Spanning Tree Protocol
• B. VLAN tagging
• C. Link Aggregation Control Protocol
• D. Quality of Service (QoS)

Answer: (D)

Prioritizing network traffic to meet performance requirements is achieved with Quality of Service (QoS). QoS lets you classify traffic into different classes, mark packets to indicate priority, and control how those packets are queued and transmitted when the network is congested. By reserving or guaranteeing bandwidth for critical applications and minimizing latency and jitter for real-time traffic like voice and video, QoS ensures important traffic gets precedence over best-effort traffic. Techniques include classifying traffic (e.g., VoIP, video, bulk data), marking packets with DSCP or 802.1p, implementing appropriate queuing strategies, and applying shaping, policing, and congestion-management methods. This direct focus on prioritization to meet performance needs is what makes QoS the correct term. Spanning Tree Protocol prevents loops in switched networks, not traffic prioritization. VLAN tagging segments the network for broadcast containment, but by itself it doesn’t prioritize traffic. Link Aggregation Control Protocol combines multiple links for higher throughput and redundancy rather than shaping traffic by importance.

Prioritizing network traffic to meet performance requirements is achieved with Quality of Service (QoS). QoS lets you classify traffic into different classes, mark packets to indicate priority, and control how those packets are queued and transmitted when the network is congested. By reserving or guaranteeing bandwidth for critical applications and minimizing latency and jitter for real-time traffic like voice and video, QoS ensures important traffic gets precedence over best-effort traffic. Techniques include classifying traffic (e.g., VoIP, video, bulk data), marking packets with DSCP or 802.1p, implementing appropriate queuing strategies, and applying shaping, policing, and congestion-management methods. This direct focus on prioritization to meet performance needs is what makes QoS the correct term.

Spanning Tree Protocol prevents loops in switched networks, not traffic prioritization. VLAN tagging segments the network for broadcast containment, but by itself it doesn’t prioritize traffic. Link Aggregation Control Protocol combines multiple links for higher throughput and redundancy rather than shaping traffic by importance.