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Your browser will redirect to your requested content shortly. The command-line options of the ping utility and its output vary between the numerous implementations. The ping utility was written by Mike Muuss in December 1983 during his employment at the Ballistic Research Laboratory, now the US Army Research Laboratory. RFC 1122 prescribes that any host must process ICMP echo requests and issue echo replies in return.
However, as a security consideration, this is often disabled. The following is the output of running ping on Linux for sending five probes to the target host www. 56 data bytes 64 bytes from 93. 632 ms 64 bytes from 93. 726 ms 64 bytes from 93.