Written by 2:51 am Tools

What is Ping? How to use Ping?

DNS troubleshooting

What is Ping?

Ping is a very universal command between all the operating systems. You can use it to test if you can reach your target and how much time it will take to do it. Ping sends Internet Control Message Protocol (ICMP) packets to the destination. Then it waits for the echo reply. It can show statistic for this request, errors and packet loss.

When you use this command, you will send few echo requests, usually 4. Then you will receive a result for each of them, that indicates if they were successful, how much data was received, the time it took for the response and TTL (Time to live).

How does it work?

Imagine the Ping command as an echo locater. When you use it on your computer, it sends a specific small packet with the ICMP ECHO_REQUEST to its destination (it could be a server, another computer on the network or a router). The recipient must bounce back the message, and send ECHO_REPLY as an answer. 

Your computer will always have 127.0.0.1 IP address. If you try to ping it, you will always get fast result. The command will verify that the TCP/IP on your device is working fine. 

You can use ping localhost and get the same result since it is the same.

If you get 4x Request timed out, then it is not working ok.  

How to use Ping?

You have the ping utility on whatever operating system you have. 

On Windows, open the Command Prompt and on macOS and different Linux distros, open the Terminal. 

There are small differences in the syntax of the ping command on the OSes. You can see them down below. 

You can ping: 

  • A domain name and see how much time it will take to respond.
  • An IP address. It will also show response time, but it will the important part is that it will show that the device is well-connected. 

We will try to use it with www.google.com. Write the following: 

ping www.google.com

Ping Google

The first part that you will see, who are you pinging, its IP address, and the packet’s size – 32 bytes. 

After that, you will get 4 results. Ping sends 4 echo messages unless you specify a different number. Those 4 answers will have response times in ms – milliseconds and TTL value showing the time to live of the packet. 

You will also get a few stats – completion rate that shows how many packets managed to arrive and a minimum, maximum, and average time. 

Ping switches and variables 

There are a lot of small differences when you use ping on Windows and Linux or macOS. For example, the option in Windows is “–n” and in Linux and macOS is “–c”. The best thing you can do is to check the syntax first. You can see all the available variables, switches, and options with a short command. 

Ping command syntax for Windows 

To get to the list of all possible options for the ping command on Windows, you can write in the Command Prompt:

ping -?

It will give you a result with a full list of options that can make your troubleshooting easier.

Midifier/OptionWhat does it do?
-tConstant ping without stopping
-aResolve an IP address to its hostname 
-nSetting the number of echo messages. The default value is 4
-l Use to send the size of the buffer
-fStopping the fragmentation of the flag (IPv4-only)
-iChange the  TTL value
-vNot functioning any more
-rUse it to see the number of hops and get a record (IPv4-only)
-sA timestamp for each hop (IPv4-only)
-jLoose source route along host-list (IPv4-only)
-kStrict source route along host-list (IPv4-only)
-wSetting the time that your device can wait for an answer
-RCheck the reverse route (IPv6-only)
-SSource address to use
-cRouting compartment identifier
-pPing a Hyper-V Network Virtualization provider address
-4Use IPv4 only
-6Use IPv6 only

Ping command syntax for Linux and macOS 

To get to the ping syntax on Linux or a computer with macOS, you need to type this in the Terminal: 

ping –h

Midifier/OptionWhat does it do?
aMakes a sound when it arrives at the target device
bThis lets ping a broadcast IP address.
BStops the ping from changing the source IP address. 
c (count)Set the number of pings. 
dSO-DEBUG on the used socket
fFloods the network with many ping packets a second. 
i (interval)Interval, in seconds, between successful transmissions. 
I (interface address)Defines the source IP address to a particular interface IP address. 
1 (preload)Numbers of echoes sent without waiting for the replies. 
nIn the output, it shows hostname instead of IP addresses 
qA quiet output. One-line ping and summary
T (ttl)T – time to live value (TTL)
vVerbose output
VCheck the version of the ping command with it
w (deadline)Time for the exit, no matter the number of messages sent and received.
W (timeout)Waiting for response time (seconds)

Troubleshooting

  • Ping an IP address to see if the device is well connected. If it fails, then the device is not connected at this moment or not reachable over the network we are checking.
  • Another scenario is that it is successful but the response times are very long. It means that you or the other side might have problems with the connection.
  • You can test different parts of the network to check which are working fine and which are not.
  • If you want to check if you are connected to the Internet, you can check one of Google’s IPs, “ping 172.217.6.164”. Why Google you ask? It is just effortless to remember. And do you remember Google been offline? Not really.
  • You can use it as a constant checker. Put it with an option to “run until stopped,” and as long as everything is okay, it will continue, but if something fails you will see it immediately.
  • If you can’t reach the name, but you can reach the IP address, this shows a problem with the hostname resolution. Probably the DNS servers are not pointed correctly, or they are not accessible.

More examples of ping command (Windows, Linux and macOS)

Here we have a few more use cases of ping command for Windows, Linux and macOS users:

*You can change the IP addresses of the examples or the hostnames and use them with yours. Also feel free to modify the command for your needs.  

Intervalping –i 5 8.8.8.8 (Linux and macOS)

This will make it wait 5 seconds before sending the following packet. 

Custom number of pingsping –n 8 google.com (Windows) ; ping –c 8 google.com (Linux and macOS)

You can decide how many echo messages to send. 

Check versionping –V (Linux and macOS)

You will see the version of the ping you have. 

Floodping –f 127.0.0.1 (Linux and macOS)

This will flood the network with many pings. 

Only Statisticping –q google.com (Linux and macOS)

It will show you just the statistic, not each individual ping time. 

Change packet sizeping –s 100 google.com (Linux and macOS)

It will change the size of the packets. The original is 32 bytes (Windows) and 56 (Linux and macOS), and in this example we have set it to 100. 

Timeout – ping –w 20 google.com (Linux and macOS)

If you use this example, the ping will exit in 20 seconds. It will terminate regardless of the number of packets send or received. 

Constant pingping –t google.com (Windows) ; ping google.com (Linux and macOS)

It will run without stopping. Endless loop. On Linux and macOS, it runs forever by default. You can stop it with Ctrl+C.

Extra tip

Did you know that you can use the ping command online, straight from your browser? This can come in handy if you only have a mobile phone around. 

Just google it, and you will see more than a few sites. If you decide to use it in this way, please make sure that the site you visit is safe, and it is not going to harm your device or personal data in any way. 

Conclusion:

The ping is not the most sophisticated tool, but it is incredibly handy thanks to the fact it works on any device. Using it, you can quickly diagnose different part of the network and find the problem. You can also check our previous article and find more useful tools in our article Тools – DNS trace, Ping, Traceroute, Nslookup, Reverse lookup.

(Visited 1,169 times, 2 visits today)
Enjoy this article? Don't forget to share.
Tags: , , , , , Last modified: October 7, 2020
Close