Quantitative Investigation of Internet Infrastructure Suitable for Elementary and Secondary Schools.

在这项研究中，在计算机教室从Web服务器获取信息的响应时间进行了定量研究。首先，通过实验发现学习者对互联网的访问分布可以用伽玛分布来近似。其次，对教育有用的网页的数据大小进行了搜索。344个网站被选中。网页的平均数据大小约为98 KB，对于下载来说足够小。第三，设置实验网络来测量响应时间。一台服务器计算机在几种带宽条件下（1.5Mbps、10Mbps和100Mbps）与八台客户机连接。从客户端到服务器计算机的TCP连接数更改为2、4、8、16、24、32、40和48。连接被启动以形成伽马分布。Gamma分布的标准差设置为零（同时连接）、10秒和20秒。从服务器到客户端传输的数据大小已更改。反应时的测量介质以等值线图表示。因此，可以说1.5Mbps的互联网连接足以让计算机教室使用教育网站。但是，为了使用大文件作为高清晰度图片，需要10Mbps的互联网连接或ADSL类连接。

In this research, a response time in a computer classroom to get information from Web servers was quantitatively investigated. At first, it was found by experiments that learners' access distribution to the Internet could be approximated by gamma distribution. Second, data sizes of Web pages that are useful for education were searched. The 344 Web sites were selected. The mean data size for an Web page was approximately 98KBytes, which was small enough for download. Third, an experimental network was set to measure a response time. A server's computer was connected with eight client computers under several bandwidth conditions (1.5Mbps,10Mbps, and 100Mbps). The numbers of TCP connections from clients to server computer were changed by 2,4,8,16,24,32,40,and 48. The connections were launched to form gamma distribution. The standard deviation of gamma distribution is set to be zero (simultaneous connections), 10 sec, and 20 sec. The transferred data size from the server to clients was changed. The mediums of measured response time were shown as contour maps. As a result, it can be said that an Internet connection of 1.5Mbps is enough for a computer classroom to use educational Web sites. However, in order to use large files as high-definition pictures, 10Mbps Internet connection, or ADSL class connection, is required.