win7修改dns : http://jingyan.baidu.com/article/f71d60375584591ab641d13c.html
win10修改dns: http://jingyan.baidu.com/article/19020a0a0ea77b529d284287.html?st=5&net_type=&bd_page_type=1&os=1&rst=&word=百度dns
刷新dns缓存：http://www.jb51.net/network/74359.html
win10修改dns: http://jingyan.baidu.com/article/19020a0a0ea77b529d284287.html?st=5&net_type=&bd_page_type=1&os=1&rst=&word=百度dns
刷新dns缓存：http://www.jb51.net/network/74359.html
