The key technologies of QoS are categorized into two types.One is the direct implementation framework, such as IntServ and DiffServ.The other is the Trafic Engineering (TE), an indirect approach.

• 实现服务质量的关键技术大体可以分为两类，区分服务、综合服务体系结构等直接实现方式和流量工程等间接方式，多协议标记交换是实现流量工程的重要手段。