$ curl -v http://www.ctrip.com * Rebuilt URL to: http://www.ctrip.com/ * Trying 125.39.6.139... * Connected to www.ctrip.com (125.39.6.139) port 80 (#0) > GET / HTTP/1.1 > Host: www.ctrip.com > User-Agent: curl/7.47.0 > Accept: */* > < HTTP/1.1 200 OK 后面部分部分省略……
$ curl -v http://125.39.6.139 * Rebuilt URL to: http://125.39.6.139/ * Trying 125.39.6.139... * Connected to 125.39.6.139 (125.39.6.139) port 80 (#0) > GET / HTTP/1.1 > Host: 125.39.6.139 > User-Agent: curl/7.47.0 > Accept: */* > < HTTP/1.1 404 Not Found < Server: CDN_NWS_4.2.0 < Connection: keep-alive < Date: Sat, 17 Sep 2016 08:02:06 GMT < Content-Type: text/html < Content-Length: 52 < X-NWS-LOG-UUID: 8ecfdf2f-6116-4859-8bf9-0c76eb654a79 < X-Cache-Lookup: Hit From 404 Cache < The requested URL '/' was not found on this server. * Connection #0 to host 125.39.6.139 left intact