两种因特网服务模型的比较研究

未来的计算机网络将是一种能够提供多种有同服务，以支持多种不同应用需求，有着集成服务（ｉｎｔｅｇｒａｔｅｄ ｓｅｒｖｉｃｅｓ）支持能力的网络．这种网络是通过在统一的分组交换网络上实现各种不同的服务性能保证机制来构造的．针对止目前广泛研究的两种不同因特网服务模型进行比较研究，分析它们各自组成部件的功能入作用，比较两者之间存在的内在联系，从而进一步提出了一种融合两者优点的组合扩展模型，并以此为基础提出了

COMPARISON OF TWO INTERNET SERVICE MODELS

Future computer network will become an integrated services network, which can provide various different services to support a wide range of network applications. This integrated services network is built by using many kinds of service performance assurance mechanisms upon a general packet switched network. This paper focuses on the comparison of two service models proposed by IETF aiming at implementing an integrated services network upon the Internet. First, the functions of their building blocks of the two models are analyzed, and then the differences between their provided services and service related mechanisms are compared. The two model's advantages and disadvantages are also compared in terms of services characteristics and implementation characteristics and their internal relationship is pointed out. An extended hybrid model is proposed based on the above comparisons, which merge the advantages of the two service models together. Finally, new research on the extended hybrid model and our opinions on the building of integrated services network is put forward.