Intelligent Protocol Analyzer for WWW Server Accesses with Exception Handling Function

Recently, the TCP/IP protocols are widely used and it is mentioned that there are problems such that the throughput is limited due to protocol procedures such as retransmission and congestion control of TCP. In order to analyze these problems, we have developed an “intelligent” protocol analyzer which can estimate what communication has taken place by emulating the behaviors of the IP, TCP and HTTP protocol entities, which are used for WWW server access communications. This analyzer also supports the handling of exceptional situations such as monitoring errors and network misbehaviors. This paper describes the details of the emulation functions of HTTP and the exception handing functions, and shows some results of applying the analyzer to actual WWW server accesses.