The iputils package contains ping, a basic networking tool. The ping command sends a series of ICMP protocol ECHO_REQUEST packets to as pecified network host and can tell you if that machine is alive and receiving network traffic.ipv6calc is a small

利用ICMP报文格式，兼容IPV4和IPV6下的Ping程序，在SP6下无需调试，即可编译，VS2005下也可-The use of ICMP message format, compatible with IPV4 and IPV6 under the Ping program, under the SP6 without debugging, you can compile, VS2005, may also

基于JAVA的ICMP协议实现，ping和traceroute，分为IPV4和IPV6均有实现-JAVA the ICMP protocol, ping and traceroute, is divided into IPV4 and IPV6 are to achieve