当今的网络应用已从多种角度和方位对服务提出各种需求 :带宽、处理优先级、最小端 -端处理时延、吞吐量、包的顺序性及丢包率等。文中对Internet上提供集成服务的两种模型资源预留 (RSVP)和区别服务(Diffserv :Differentiatedservices)作了深入的比较和研究 ,并着重对区别服务的实现方法进行探讨 ,提出通过修改端系统传输层协议的方法实现区别服务并进行理论论证。 Today’s web applications have a variety of needs for services from a variety of perspectives and orientations: bandwidth, processing priorities, minimum end-to-end processing latency, throughput, packet ordering and packet loss rates. In this paper, we make an in-depth comparison and research on two model resource reservation (RSVP) and differentiated services (Diffserv: Differentiated services) that provide integrated services on the Internet, and emphatically discuss the realization of differentiated services. Layer agreement to achieve the difference between the service and theoretical proof.