QoS in LAN Environments refers to the implementation of Quality of Service techniques within local area networks to manage and prioritize network traffic efficiently. It ensures that critical applications such as voice, video, and business systems receive higher priority over regular data traffic. Techniques like traffic classification, marking, queuing, and bandwidth control are used to optimize performance and ensure fair resource usage. QoS helps reduce latency, jitter, and packet loss within the LAN. It ensures smooth communication between devices in offices, campuses, and enterprise environments. It also improves application responsiveness during peak usage periods, enhancing overall network efficiency, stability, and user experience.