ARP Explained | Address Resolution Protocol

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What is ARP?
ARP stands for Address Resolution Protocol. It's designed to discover MAC addresses and then map them to an IP address.

When our computers communicate, they primarily use IP addresses. But before they can send any data to the layer 2 switched network, they first need to find the MAC address of the destination.

To do this, they use ARP requests to shout out to the entire networks asking "who is 192.168.0.4? Tell me your MAC address". All other computers will ignore this request accept for 192.168.0.4 who will respond with its own MAC address.

Our computer will then take note of this MAC address and associated IP address and keep them in the ARP cache for future use.

#ccna #cisco #networking

[charankumar]

If education is made in this way to everyone in every colleges then there would be so may innovations instead of suicides. Really the explanation is outstanding and marvelous with clear cut information.

[tetonicsheldor]

I'm surprised you guy aren't more popular. There is a lack of, good, networking videos with clear English. Thank you so much!

[nilufarbagherzadeh]

As I said before you are the best in this field in youtube and you made many concepts of network comprehensible to me, thank you very much

[Vineeth_Shankar]

Words can’t express how thankful I feel for this video. 👏🏻😊😅

[abelashenafi]

These videos have helped me immensely while I was doing my Thesis on IoT network vulnerabilities, where I exploited ARP vulnerabilities. Thanks a million CertBros. Because of your videos and all, I'm thinking about becoming a Network Security Engineer. Kudos

[yana]

Wow, such an amazing explanation! This is the first video which actually gave a real-life example, and most important of all, it explained why you can't sent ARP requests to destination outside the current L2 network (it was a question I'd been wondering while studying for the CCNA, but the official introductiory course never even mentioned it).

[btnyarambi]

Simple and straight forward english and explanations that are beginner friendly
Bit by bit dissection into what really happens at each step
You are really talented at this keep up the good work
I am currently preparing for the CCNA but I already feel empowered to go for CCNP

[tg]

You make IT learning fun. Thank you very much. It is hard to learn this in classroom.

[sparkymarkm]

I’ve seen a few explanations on the subject but it can be described succinctly in 8 minutes and 39 seconds thank you very much.

[tusharriyat]

Let me tell one thing you guys are very professional and I like that.

[HootyTooty]

I think the wireshark example takes this tutorial above and beyond averagy quality, yet it already is very high quality. VERY GOOD JOB! Keen to watch other vids.

[pinedajulio]

The way you put the details is so easy to understand, but the wireshark example was so awesome🎉

Thank you for sharing!!!

[Saucetorious]

Best channel I’ve discovered on YouTube! Keep up the good work!

[phephedwiputra]

The explanation is very clear and very helpful, thanks

[jerobaladze]

simple and direct explanation .. love it

[cthoadmin]

What a find!!! Gold pure gold! All the info and background you need in concentrated form. Thanks for this.

[itaybarok]

Thanks for teaching in such a clear and hands on way.
I learned some new commands of arp in the powershell and also I got a better understanding of default gateway and also using thw wireshark I show in real time the replay to the arp request.
You are doing very good with this videos. Keep moving.
Besides, if you can CB I want you to write me a bit nore about the difference between cmd and powerrshell in windows.
I am used to the bash on linux so if you compare them to it later it will be helpful.

[hightower-esqu]

Please do a series on wireshark. Your little wireshark is the best.

[ymnivhk]

Thank you for explaining it in an easy way to go.

[thilinaavishka]

This is the best video for ARP you could find on the internet ❤️