Quality of Service (QoS) focuses on managing and prioritizing network traffic to ensure reliable and efficient communication across systems. QoS techniques help maintain performance by controlling bandwidth, reducing latency, minimizing packet loss, and improving network stability. This training explains how different traffic types such as voice, video, and data are prioritized based on application requirements. It also covers traffic shaping, congestion management, queuing methods, and service-level policies used in modern networks. You will learn how QoS improves user experience and supports critical applications in enterprise and service provider environments. The course also highlights best practices for implementing scalable and high-performance network communication systems.