检测网络联通性&generate_204服务汇总与评测
服务提供者 链接 大陆体验 境外体验 http/https IP Version Google http://www.gstatic.com/generate_204 5 10 204⁄204 4+6 Google http://www.google-analytics.com/generate_204 6 10 204⁄204 4+6 Google http://www.google.com/generate_204 0 10 204⁄204 4+6 Google http://connectivitycheck.gstatic.com/generate_204 4 10 204⁄204 4+6 Apple http://captive.apple.com 3 10 200⁄200 4+6 Apple http://www.apple.com/library/test/success.html 7 10 200⁄200 4+6 MicroSoft http://www.msftconnecttest.com/connecttest.txt 5 10 200/error 4 Cloudflare http://cp.