![]() ![]() If you're new here, you may want to subscribe to my RSS feed.Ping Monitoring is a common practice used to check the availability and status of network devices and computers using ICMP protocol. So a traceroute utility is actually two utilities, ping and traceroute. The time to the last hop in the chain is exactly the same as is if you'd used a ping utility to that host. You don't add up all the times between you and the destination host. This is an important concept to understand. ![]() The last hop in a (successful) traceroute is actually the round-trip time to the destination server. As each router responds, we record the data. PingPlotter sends out one packet of data for each router in the path. For more information on this, see our tutorial on this topic. The TTL portion of a packet is used to make sure a packet never gets involved in an endless loop, but we use it to tell the intermediate routers to send data back to us. We can determine this information by changing the TTL information in a packet. Any Internet data will certainly go through a number of servers, and we want to find out how well these respond. We might want to understand if any of the routers in between you and that target server are causing the problem. This is interesting in case the target server isn't responding, or responds slowly. PingPlotter also shows the latencies / times of the intermediate hops. This ping time is displayed in PingPlotter as the response time in milliseconds of the final destination (also called "Round Trip Time" – the time it takes a packet to travel the full round trip). Usually this time is specified in milliseconds (1/1000 of a second). In general, the lower this is, the better your connection to a site. If we measure the time it takes for the packet to get to that site, and then return to you, we call this the ping time or latency. When this remote computer or router receives this data, it responds back (sometimes called an "echo reply"). ![]() Your computer sends a "packet" of data (sometimes called an "echo request") to a remote computer or router. The performance of a network target (i.e.: web site, service or similar) can be measured by sending a ping packet. PingPlotter takes this core concept, and then adds long-term monitoring, graphical displays, saving of data, alerts and a myriad of other useful features. The "traceroute" (or "tracert" under Windows) utility has been a core network troubleshooting tool for a number of years. PingPlotter uses the concept of "traceroute" to do its work. PingPlotter is particularly very useful for the fact that it can graphically show where there is a lag (latency or delay) or if the destination is not reacheable which node is actually having a problem. PingPlotter has a freeware version and feature rich Standard and Pro editions that one can buy. With graphical output, multi-threaded query engine and "copy as image" capability, PingPlotter is useful tool for individuals who need a light-weight, no-cost tool for running repeated traceroutes to a target. PingPlotter is a small but very useful tool bringing fast, effective and graphical traceroute-based troubleshooting information. ![]()
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