QualityofServiceManagement
Quality of Service (QoS) is a family of networking techniques that manage and prioritize network traffic to meet performance requirements for specific applications and users. QoS seeks to provide predictable levels of bandwidth, latency, jitter, and packet loss by assigning different treatment to packets based on their type, source, destination, or other criteria.
Core concepts include traffic classification and marking (differentiating traffic using fields such as DSCP/ECN in IP
Two broad architectural approaches are IntServ and DiffServ. Integrated Services (IntServ) aims to guarantee resources on
QoS features are implemented across multiple layers and technologies, including MPLS with Explicit Congestion Notification and
End-to-end QoS across the entire Internet is difficult due to varying policies and agreements among networks;