AJAX技术优化在线考试流量

B/S结构的在线考试系统由于浏览器无状态的属性，导致了考生考试期间数据流量大，从而可能造成服务端控制指令的延迟，导致功能和数据异常。Web流量优化是考试系统成功的关键。在我们所设计的考试系统中，使用了AJAx技术，在考生界面上使用了单题显示方式，充分利用AJAX的回调函数功能，在一定程度上解决了这个问题，使在线考试系统在考试期间的数据流量比传统方式减少了90％左右，节省了带宽，提高了系统的运行效率，在最大程度上保证了数据安全。

AJAX technology optimization online exam flow

The network examination system of the summary B/S structure does not have inherent attribute of the state because of the browser,it causes examinee to be in the test period data flow heavy,serve end delay to control order,it is unusual to cause function and data.In the examination system that we design,we have used AJAX technology,it has used the display mode of the single question on examinee's interface,utilize the reajustment function function of AJAX,it has solved this problem abundantly to a certain extent,it makes the flow of data during examination of the online examination system reduce by about percent ninty than the traditional way,have save the bandwidth,it has improved systematic operational efficiency,it has guaranteed the security of the data on the biggest intensity.