C:\>ping www.cablenet.ne.jp
Pinging www.cablenet.ne.jp [61.215.160.251] with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 61.215.160.251:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

web落ちたの？