应用层控制协议SIP(Session Initiation Protocol)已被用于在IP网络中建立、修改和终止多个参与者参加的多媒体会话.为了保证SIP的不同实现之间能够可靠地进行通信,需要对其进行严格的一致性测试并检验SIP实现是否与标准一致.ETSI(European Telecom munications Standards Institute)开发的下一代测试描述语言TTCN-3(Testing and Test Control Notation version 3)在SIP一致性测试中起着重要的作用.本文描述了通用TTCN-3测试系统的设计和实现以及使用TTCN-3对SIP进行测试的情况.
The rapid development of the Network makes the comprehensive analysis as well as the quantitative evaluation of its security become more and mere important. This paper illustrates the major realization process of a Network Security Quantitative Evaluation System,which,from an intruder's angle ,established a Hierarchy Intrusion Relationship Graph by analyzing the credit degree fusion and relevancy of the secure information of the target network and by combining with powerful database information. At last, by applying some relative mathematics model and arithmetic, the paper analyzes and evaluates the security of this Network Hierarchy Intrusion Relationship Graph comprehensively and quantitatively.
