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适合拿着笔记本到处上网的人，预配了多套上网的网卡设置方案，一个按键搞定，就不用那么麻烦了。
Whenever mobile user moves to different network, has to change particular IP address, gateway address, subnet mask, proxy server and default printer, etc., to particular network environment. In order to do it, he has to remember TCP/IP settings information of every network. Also, he has to reboot the computer to apply it to the system and to access the Internet.
