我正在从印度检查，BSNL家庭宽带连接，标准请求的URI获得优秀的ping响应，一般在40到100毫秒之间
E:\Documents and Settings>ping storage.googleapis.com
Pinging storage-ugc.l.googleusercontent.com [74.125.236.106] with 32 bytes of da
ta:
Reply from 74.125.236.106: bytes=32 time=93ms TTL=56
Reply from 74.125.236.106: bytes=32 time=93ms TTL=56
Reply from 74.125.236.106: bytes=32 time=93ms TTL=56
Reply from 74.125.236.106: bytes=32 time=93ms TTL=56
Ping statistics for 74.125.236.106:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 93ms, Maximum = 93ms, Average = 93ms
而CNAME重定向的URI通常在280到400毫秒之间没有得到类似的ping响应。
E:\Documents and Settings>ping c.storage.googleapis.com
Pinging storage.l.googleusercontent.com [74.125.135.128] with 32 bytes of data:
Reply from 74.125.135.128: bytes=32 time=315ms TTL=44
Reply from 74.125.135.128: bytes=32 time=296ms TTL=44
Reply from 74.125.135.128: bytes=32 time=312ms TTL=44
Reply from 74.125.135.128: bytes=32 time=312ms TTL=44
Ping statistics for 74.125.135.128:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 296ms, Maximum = 315ms, Average = 308ms
CNAME Redirects是否有替代URI。