Google cloud storage 标准请求的URI比CNAME重定向具有更好的ping响应

我在印度检查，BSNL家庭宽带连接，标准请求的URI得到了极好的ping响应，通常在40到100ms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

是否有CNAME重定向的替代URI