【摘要】 <正> 一、前言随着Internet的应用和发展,特别是多媒体应用的需求,对服务质量的要求越来越高,端到端的服务质量已成为其发展的瓶颈,为此Internet工程任务小组(IETF)提出了不少相关保证Internet服务质量的体系模型,其中IntServ/RSVP(综合服务体系/资源预留协议)体系模型的服务质量最完善,但由于其需要复杂更多还原

【Abstract】 QoS is the bottleneck of Internet, many architectures have been proposed to guarantee the QoS, IntServ/RSVP is the best of all, but this architecture is difficult to implement because of its complicated signal, therefore it is poor to scale. So more and more attentions shift to the architecture of Differentiated Service. It classify all the packets by their QoS requirement, these packets get different Per-Hop-Behavior (PHB) to guarantee their QoS in each node through their path. This architecture is new and easy to scale, and it provides scalable solution to QoS in Internet.更多还原