最近看看TCP/IP方面的书， 我的地址为192.168.0.5/24，试试PING了一下网络地址和广播地址，结果如下：
C:\>ping 192.168.0.0
Pinging 192.168.0.0 with 32 bytes of data:
Destination specified is invalid.
Destination specified is invalid.
Destination specified is invalid.
Destination specified is invalid.
Ping statistics for 192.168.0.0:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
C:\>ping 192.168.0.255
Pinging 192.168.0.255 with 32 bytes of data:
Reply from 192.168.0.1: bytes=32 time<1ms TTL=64
Reply from 192.168.0.2: bytes=32 time<1ms TTL=64
Reply from 192.168.0.2: bytes=32 time<1ms TTL=64
Reply from 192.168.0.4: bytes=32 time<1ms TTL=64
Ping statistics for 192.168.0.255:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
C:\>
糊涂了，对这个192.168.0.255的ping请求是由谁响应的？
