Ping is most commonly use tool to troubleshoot a network problems. Ping (Packet Internet Groper) is included with most OS (operating systems). It is invoke using ping command and uses ICMP (Internet Control Message Protocol) to reports error and provides information related to IP packet processing. Ping work by sending an ICMP echo request to the targeted IP address. If the host computer with destination IP address is reachable, it responds with ICMP echo reply message.
A ping command usually output some other information about a network performances, like a round-trip time, time to send an ICMP request packets and receive an ICMP reply packets.
Below is an output of the ping command from a Windows PC:
In the above example we have ping the ip address 10.10.100.1. ping on Windows sends four ICMP request packets, By default. As you can see that from the output above, the hosts with IP address of 10.10.100.1 is reachable and has replied with four ICMP reply packet. You can also see that the remote host has replied within 1 ms (time<1ms), which indicate that the network is not congest.
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