5.3 Describe the class models for providing QoS on a network
5.3.a 4/5 Class model
5.3.b 8 Class model
5.3.c QoS Baseline model (11 Class)
The class models for providing Quality of Service (QoS) on a network are designed to prioritize different types of network traffic.
5.3.a 4/5 Class Model: This model defines 4 to 5 classes of traffic and assigns priority levels to each class. The classes are usually assigned based on the criticality of the traffic. For example, real-time traffic such as VoIP and video conferencing would be assigned a higher priority compared to bulk data transfers.
5.3.b 8 Class Model: This model extends the 4/5 Class Model by adding more classes and finer granularity in prioritization. This model is commonly used in enterprise networks.
5.3.c QoS Baseline Model (11 Class): This is a more sophisticated and granular model that provides a comprehensive approach to QoS management. It defines 11 classes of traffic and assigns priority levels to each class. This model is often used in service provider networks to ensure that different types of service-level agreements (SLAs) can be met.
In summary, these class models provide a systematic way to manage network traffic and ensure that critical traffic is given priority over less critical traffic.