Description: Control Message Protocol (ICMP), can be directly connected external network test delay, and can also test network, the complete code
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ICMP
....\ICMP.cpp
....\ICMP.dsp
....\ICMP.dsw
....\ICMP.exe
....\ICMP.h
....\ICMP.ncb
....\ICMP.opt
....\ICMP.plg
....\Ping.cpp
....\Ping.h