Ping Command Explained | Real World Example

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The ping command is a widely used and supported network troubleshooting utility.
It can be found on pretty much any operating system, from Windows, Mac and Linux, to even switches, routers and firewalls.
Ping uses ICMP, or the Internet Control Message Protocol, to test connectivity between two nodes.
The name ping comes from sonar. Sonar works by sending out sound waves and detecting any echoes reflected back by objects. Ping works in a similar way.
By sending a receiving a successful ping, you can determine if a system is on the network, and most importantly, if you can reach it.
There will be times when some, or none of the replies come back, and there are a few things that could cause this.
Request Timed Out
Then the most obvious cause of this error is that the system you’re trying to reach doesn’t exist, isn’t powered on, or isn’t connected to the network.
Another reason why a system might not respond to a ping is due to the firewall.
Destination Host Unreachable
This error generally indicates that a route to the destination cannot be found. This could be from the localhost or the default gateway.
Ping could not find the host
This means your computer was unable to resolve the hostname to an IP address indicating a potential DNS server issue.
That's what happened when you have complete packet loss. Where things can get a bit more difficult to troubleshoot is when you only get partial packet loss, meaning some pings get replies but others don’t.
This can be caused by any number of things but generally, it means something is not behaving the way it should
Some examples are
Broken network cards
Broken cables
Problems with the switches or routers
And this could be at any point between you and the machine you are trying to reach.
So for that reason, complete packet loss is usually easier to troubleshoot.

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CertBros videos are simple, short, and help new guys understand the IT world by building up foundational understanding. It also helps that his voice is relaxing lol.

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Thank you Jeff! Really appreciate the kind words. Hope my relaxing voice doesn't put you to sleep though 🤣

[@ucok1789]

agree

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found each n every second of the vid informative. Awesome!

[@abdul-razakyahaya4833]

Bravo, for the simple but yet educative content.

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Thank you! Great to see you back in the comment's 😁

[@eabelcourt]

Something so simple, explained so well

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[@silvanabongiorno3292]

Excellent presentation, Thanks

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Brilliant sir,thankyou😊

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[@Certbros]

Thank you Geofrey! Glad you liked it 😁

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He’s back!

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Outstanding!!!!

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Nicely done sir 👍

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Thank you Orley!

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Nice presentation bro

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Excellent

[@hex310]

I appreciate this channel. Thank you foe sharing your knowledge.

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Thanks Hex! Good to hear you like the channel. I appreciate the comment!

[@zyeuh2565]

Great vid.

[@santhoshgandhasiri3101]

Liked it, when explained with usecase

[@Certbros]

Thank you Santhosh!

[@theoryandapplication7197]

thank you brother

[@HemanthJabalpuri]

Great video

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Thank you

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Thank you.

[@ucok1789]

amazing

[@ssssinlab]

I admire your hard work and the videos you create . I am just confused about the way you make animations of those switches, routers and etc. It must be a software , yeah?

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[@aashita6850]

Can we always use google's dns server if we have a bad dns

[@iphelper1574]

Great video, and another place to check if ping doesn't work is ACL.☻

[@Certbros]

Thank you! Absolutely right, ACL is another reason why pings may not work 👌

[@DashkaMilashka015]

@@Certbros what is it? and how often would that be a problem?

[@macbethmabena9816]

great video

[@Certbros]

Thank you!

[@shubhampatil187]

I used to get confused while practically doing it. But watching this video 2 times its making me understand this well. Thank You Sir.

[@rajendrapanga68]

TQ

[@richardroman243]

nice

[@Certbros]

Thanks Richard!

[@leothalion3983]

What ports should be blocked on a server?

[@Certbros]

Generally speaking, all inbound traffic should be blocked accept what you specifically need

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Packet INternet Groper

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Wow.....

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Thanks!

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les BTS CIEL (SN) on est la

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Someone taken over this channel from something else? Never subbed to this, not had any feeds of updates but suddenly now get one and starts to appear in my subs.

[@Certbros]

No the channel hasn't changed really. Maybe you subed a while ago when the videos looked slightly different? Either way, thanks for stopping by 😁

[@wb8ert]

I'm disappointed becuse I was looking for how to program / create my own ping command. A discussion of what one needs to do both in a procedural and OO language would be very helpful.

[@flicmydik]

Gayest music