HrPing displays the IP identification field of the replies and thus makes it possible to do "silent load measurements" see german c't magazine 23/2003, p. hrPing shows you the standard deviation of the timings as well as the average times. Plus, for the statistically inclined, hrPing calculates the standard deviation as well, to show you how much the values "jiggle". hrPing counts the replies and error messages separately, so the global statistics don't mess up one another. You get the round trip times for ICMP error message replies as well! This way you can e.g. Plus, hrPing has much better statistics than Windows Ping. this "overlapped" way of sending is really helpful. If you want to test line conditions, throughput, etc. So, with a "standard" ping packet of 60 bytes (IP header + ICMP header + ping payload) you can send thousands of packets before you get the first reply. The reason why you should like this is easy: with broadband you often have a delay of some 40 msec, while the upstream bandwidth of the whole connection is some 500 kbytes/sec. HrPing sends out one ping packet every x milliseconds (you can adjust this time with the -s parameter) while listening for incoming replies and printing the output if there is any. Windows Ping always sends one packet, waits for the reply, then prints its output line, repeat. The next thing Windows Ping can not do is send more than one ping packet at a time. You can't get any more accurate with standard PCs today! You can even ask hrPing to use the CPU's "Time Stamp Counter" which is incremented with the CPU's clock cycle. This is usually done by using the Windows' "Performance Counter" which has a resolution of some MHz. What's more, hrPing times the round trip delay in microseconds (1/1000 msec). With hrPing you have the possibility to vary. Not all packet types pass all firewalls and networks equally easy. What's more, hrPing can send UDP packets and ICMP timestamp packets as well. Like every Ping, hrPing sends "ICMP Echo Request" packets to the remote computer and listens to the matching "Echo response" packets. You can do much more with hrPing than with Windows Ping. Size sweep: Send increasing packet sizes.Can have multiple pings "in-flight", no need to wait for a reply before sending the next ping.Times and handles ICMP error replies as well. ![]()
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