To create the different network types , visual studio team edition for testers uses a simulation of network bandwidth at the application layer , for example , lan and dialup 56k 为了创建不同的网络类型， visual studio team edition for testers在应用层使用网络带宽模拟。例如，模拟lan和拨号56k网络。
However , although high bandwidth is making gains in north america , many people , both in north america and in other parts of the globe , are using dialup connections or are accessing the web with wireless devises 然而，尽管现在很多宽带用户，但全世界仍然有很多利用电话拨号或者利用无线装置上网的用户。
For example , if a laptop user starts a dialup network connection , an adaptive proxy would recognize this change , discover and run its new configuration script , and adjust its settings appropriately 例如，如果膝上型电脑用户开始一个拨号网络连接，则自适应代理将会识别这一变化，发现并运行它的新配置脚本，并相应调整其设置。
Students should be able to compare and contrast the common types of communication links ( e . g . modem dialup or cable modem , leased line , broadband and wireless , etc . ) for internet access in terms of data transfer rate , cost , and reliability 5学生应能就数据传送速率、成本及可靠程度等方面去比较及对比常用通讯连路种类，例如数据机拨接、电缆数据机、专线、宽带及无线等。
The paper discusses following issues in the introduction of the modules : dos defense support in the pppoe protocol ; bring forwards and implement a pppoe connection controlling method based on ppp ; windows tapi - oids sequence which the virtual dialup adapter has to deal with properly ; how to deal with the communication between kernel driver and the application the paper makes an all - sided study on the pppoe protocol for the first time in china , so it has relatively important values of reference for following study and developing ; it not only realizes a practical tool for adsl , which has tremendous economy profits , but also perfects the pppoe c / s platform , which could support corresponding r & d actives at source code level 在对这些功能模块的介绍过程中还做了以下工作：探讨了pppoe协议在防范dos攻击方面的支持；提出并实现了一种基于ppp协议的pppoe连接控制方法；记载了虚拟拨号网卡完成安装和开始工作所要正确处理的windows系统的tapi序列；使windows应用程序与核心驱动程序之间正确通讯。本课题在国内较早对pppoe协议进行了较为全面的研究，故对后继的开发和研究都有着较为重要的参考价值；该课题不仅实现了一个实用的adsl工具，带来了可观的经济效益，更完善了在pc上实现的pppoe ‘服务器/客户端’结构平台，从而为相关研发提供源代码级的支持。
