Ping Command to Continuously Test Connectivity
The ping command is one of network admins' most commonly used tools. It has served and continues to serve network admins as one of the best network troubleshooting tools since it was released almost 39 years ago. In this article, we cover what the ping command does, how to use it, and more. Read on to learn the basics about this simple but powerful networking tool that IT teams can't live without. The ping command tests if you can reach a host through an IP network. When a user uses a ping command, an Internet Control Message Protocol (ICMP) echo request is sent to the destination. ICMP is a network layer protocol part of the IP suite. If the host's configuration is to respond and the ping echo request reaches the host, it will send an echo reply with the same payload as the echo request. The default ping size on Windows is 32 bytes, while many Unix or Linux systems use 64 bytes. Aside from Windows and Linux, the command is also available on macOS. In fact, you can find it in almost all versions of Unix, as well as most other operations. In common IT scenarios, the ping command is used to: The syntax for a basic ping command is similar for both Windows and Linux systems. It's just "ping" followed by the destination URL or IP address. For example: or The ping command also offers a set of options for network troubleshooting. While the possibilities or option switches are different for Windows and Linux systems, the syntax is similar: ping followed by option followed by the option parameters followed by the destination URL or IP address. For example, in Windows systems, to ping facebook.com with 5 echo requests, the command will look like this: You can, of course, use multiple options at the same time. For example, if you want to ping www.facebook.com with 3 echo requests, each with a Data field size of 100 bytes, the command will look like this: In Windows, open the command prompt and simply type the ping command with the appropriate options. For example, to ping Facebook 7 times, type: The results of sending each packet will be displayed below. In Linux systems, open the terminal and type the ping command. For example, to ping Facebook 5 times at an interval of 10 seconds: The first line of the results will show the hostname and the number of bytes sent. The following few lines will tell you the echo reply from the host for each of the ICMP packets that were sent with the ping command. In the example below, four echo replies were received. The bytes show the number of bytes sent back as the reply. This is usually the same as the number of bytes sent. Time entry is the number of milliseconds it took for the host to receive the request and send back an echo reply. The TTL value represents the number of hops the packet traveled through to reach your system. These packets in the above example had 71 hops before they returned. The following few lines show the statistics for the entire ping command. In the below example, four packets were sent and none were lost. And the average round trip time for these packets was 16 milliseconds. The ping command has many use cases. Obviously, the primary use case is to see if a remote system can be reached. Just send a ping to the host, be it a server or any remote system, and if it pings back, it means it's alive and kicking. You can also set up a repeating ping command to a server to monitor its status. For example, you can set up repeated echo requests on a Windows system until interrupted using the following command. In Linux, ping is repeated unless the number of echo requests is specified. Here you can also set the time interval between each ping. For example, you can ping a host every 60 seconds with this command: There are also tools with which you can configure your system to send ping commands as a response to an event. You can also use the ping command to figure out connectivity issues in your network. For example, if you're not able to reach a website or a remote server over IP you can use this command to ping your router: If you're getting a response, it means the connection from your system to your router is working properly and the issue is beyond your router. If the response comes back as "unknown host," your system could not send the ping. This could indicate problems on your end, or the destination you're trying to reach doesn't exist. But if the response was "timeout," it means that your system sent the ping, but the destination didn't send back a reply. You can also configure the ping command to run continuously in specific intervals. This can help you constantly monitor remote systems. Try to use the command to see how your network responds under high load conditions. With this command, your system will send maximum echo requests at the highest speeds possible. You can analyze your network with the results of this command: The ping command is commonly used for troubleshooting network issues. The command sends ICMP packets to the host or the destination as ICMP echo requests. The host sends ICMP packets as a reply, and the system computes the time it took and displays the results. To use the ping command, just type ping followed by the hostname or the URL in the command prompt for Windows systems. For Linux systems, type the same command in the terminal. Don't forget that the command syntax looks like this: Ping command offers several options. They are different for Linux and Windows systems. But the general syntax is ping option hostname. Besides testing the reachability of a host, you can use the ping command to monitor a service or a system continuously. You can also use it to troubleshoot your network and test your network configuration. The word ping was not intended as an acronym when the tool was designed. But the word has been expanded for a long time as Packet InterNet Groper. The most common use of the ping command is to find if a server or a remote system is reachable over an IP network. The ping command only gives the time it took for a packet to travel from the source to the destination. It ignores all the hops the packet makes to reach the destination. Meanwhile, pathping displays all the routers the packet goes through, the time it took to reach them, and information such as packet loss.What does the ping command do?
Ping syntax
ping www.facebook.com ping 157.240.23.35
ping /n 5 www.facebook.com
ping /n 3 /l 100 www.facebook.com
Ping command options in Windows
In Linux, the system sends ping requests continuously unless interrupted.
Ping command options for Linux
How to use the ping command?
ping -n/ 5 www.facebook.com
ping -c 5 -i 10 www.facebook.com
How to read a ping test?
Ping command examples
ping /t hostname
ping -1 60 hostname
ping 127.0.0.1
ping -f hostname
Key takeaways
ping hostname
Frequently Asked Questions
What does ping stand for?
What is the most common use of a ping command?
What's the difference between ping and pathping commands?
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Source: https://blog.invgate.com/ping-command
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