Design And Implementation NQA ICMP PATHJITTER Testing Plug-in

The NQA(Network Quality Analyzer) is a realtime technology for detecting andstatistics the network performance.It can statistic the information as corresponding time,network jitter, the rate of packet loss. Besides, the NQA also provides the linkage functionof Track and the application modules to monitoring the change of network in real time, sothat, the problems can be finded and solved on time to avoid the communicationinterruption or service quality reducing. The NQA supplise the analysis of the networkperformance or service quality and provides the parameters for network users by sendingtest messages like the jitter delay, HTTP delay, TCP and FTP connection delay, the rate offiles transmission and the delay of accessing the IP address through DHCP. With theresoult of NQA testing, users can realize the network performance on time, to deal withthe problem of network.It’s analysis of the NQA system at first and it decompose the system into manymodule, we call this dealing as layer decomposition. And we will decompose the modulewhich in layer decomposition as many pieces. Each piece will have their own functionindependent. And we can find the way to comply all of the pieces in the article. At last, Igive the way which to test the NQA ICMP PATHJITTER. The troditional function Ping isusing ICMP to test the time that data packages cost between the front end and thedestination end. The NQA enrich the function of Ping, and provides more features.The NQA system developed with the CMMI, and it’s required to achieve strictaccordance with the V model. By the final test, PATHJITTER plug-ins completed thepre-target detection capability can be normal and stable. The NQA supports11types oftesting presentaly (such as the ICMP-echo, DHCP, DNS, FTP, HTTP, UDP-Jitter, SNMP,TCP, UDP-echo,Voice and DLSw). The NQA module allows several test groups work atthe same time. Users can dispose the number of concurrent group by their demands byNQA.