Which traffic type can obtain bandwidth guarantee before congestion occurs?

Which traffic type can obtain bandwidth guarantee before congestion occurs?

• A. AF21
• B. AF22
• C. AF23
• D. All of the above

Answer: (A)

The concept of traffic types refers to differentiated services in networking, particularly in quality of service (QoS) management. The specific choice of AF21 is relevant here because it represents a specific forwarding class in the Assured Forwarding (AF) Per-Hop Behavior (PHB), which is designed to provide assurance of delivery under normal conditions. AF21 is recognized as a class of service that can guarantee a minimum level of bandwidth for the traffic it handles. This means AF21 can prioritize certain types of data packets, ensuring that they maintain essential bandwidth and performance metrics even when the network starts to become congested. The assurance of bandwidth allocation under typical operating circumstances is intrinsic to its design. The other choices, AF22 and AF23, also belong to the AF family and include varying levels of service priority but may not offer the same guarantees at the same thresholds as AF21. AF21, being the lower-tier class, is designed for high-priority traffic that may need more consistent handling, making it essential for applications that require predictable performance, such as voice and video applications. In summary, AF21 is the most straightforward answer because it explicitly guarantees a minimum bandwidth allocation in the face of potential congestion, making it a reliable choice for applications needing consistent performance

The concept of traffic types refers to differentiated services in networking, particularly in quality of service (QoS) management. The specific choice of AF21 is relevant here because it represents a specific forwarding class in the Assured Forwarding (AF) Per-Hop Behavior (PHB), which is designed to provide assurance of delivery under normal conditions.

AF21 is recognized as a class of service that can guarantee a minimum level of bandwidth for the traffic it handles. This means AF21 can prioritize certain types of data packets, ensuring that they maintain essential bandwidth and performance metrics even when the network starts to become congested. The assurance of bandwidth allocation under typical operating circumstances is intrinsic to its design.

The other choices, AF22 and AF23, also belong to the AF family and include varying levels of service priority but may not offer the same guarantees at the same thresholds as AF21. AF21, being the lower-tier class, is designed for high-priority traffic that may need more consistent handling, making it essential for applications that require predictable performance, such as voice and video applications.

In summary, AF21 is the most straightforward answer because it explicitly guarantees a minimum bandwidth allocation in the face of potential congestion, making it a reliable choice for applications needing consistent performance