QoS Policies Across Devices refer to the consistent application of Quality of Service rules on multiple network devices such as routers, switches, and firewalls. These policies define how traffic is classified, prioritized, and managed across an entire network infrastructure. They ensure that critical applications like voice, video, and business services receive appropriate bandwidth and priority. Network administrators configure uniform QoS rules to maintain consistent performance across all devices. This helps reduce latency, jitter, and packet loss in distributed environments. QoS Policies Across Devices are essential for ensuring stable, efficient, and predictable network behavior in enterprise networks.