ARP Explained - Address Resolution Protocol

[@RiqzaR]

I’m currently an Engineering student, & if I get a job. I’ll surely donate to this channel for making me understand cleanly.

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"IP address is used to LOCATE a device on the network and the MAC address is what IDENTIFIES the actual device" 👊👊

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This part really made me got the point without a struggle

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i was looking for that one all day , so happy i found this video .. life saving .

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That single sentence explained more than a whole paragraph from some books.

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for me, a computer rookie and non-english native speaker, this is an amazing explanation video for ARP

[@obetperez8265]

I can't imagine of a better way of teaching. Thank you so much professor.

[@PowerCertAnimatedVideos]

Thank you

[@sandalifernando8847]

Yes, so true

[@jamesmcv]

I've been a network engineer for over 25 years. It's funny seeing a video on ARP, which we use quite a bit in troubleshooting Layer 2/Layer 3 problems. When I first started, ARP issues were common due to ARP caches not refreshing frequently enough. Every now and then, I'll run into an issue where an IP address change causes a device on the network to stop communicating with the device that changed IPs because it's old and it's ARP cache won't update in a timely manner.

[@aszneemabrotha7347]

doing network stuff in subject called ipt. This helps so much

[@KabelkowyJoe]

And this ARP cache. is probably why i have to reboot system everytime i change subnet address of router, and it's IP, probably only thing Windows "Repair network" tool is doing

[@jamesmcv]

@@KabelkowyJoe Changing the subnet on the router means your Windows PC has to either refresh DHCP (likely) or change the IP of your PC if you set a static IP address (unlikely unless you purposely did it). Windows only refreshes DHCP every 24 hours by default. You could force a refresh or just reboot. Honestly, reboot is just as easy.

[@abhinavtyagi1657]

But if ip addresses are unique within a local network, why do we need mac addresses to identify the device?

[@jamesmcv]

@@abhinavtyagi1657 MAC address is layer 2 (specifically ethernet), IP address is layer 3. MAC address is a unique identifier for Layer 2 Ethernet.

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As you explain, it is effortless to let you know that millions are learning through you. Thanks very much for doing these videos

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The best channel i have ever seen. Keep up the good work pal.

[@PowerCertAnimatedVideos]

Thanks.

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fully agree with you

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I spent 9 hours, listening, understanding, taking notes, from my professor's 3 hour lecture. And was still confused. yet your 4 minute video gave me a clearer understanding. what an obvious failure the education system has reached

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Very well explained. I am a new electrical engineer setting up the 10Gb ethernet interface on an FPGA and this really helped understand ARP and Ping packets.

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OMG!Your explanation can understand even a fool like me. Really it's awesome

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This is what instructional videos are all about. I volunteer in the computer center at a local library where most students know nothing more about computers other than how to turn one on. When they are done watching all the PowerCert videos, I'm scared they're going to take over my "job!"

[@PowerCertAnimatedVideos]

Thank you :)

[@noodler911]

@@PowerCertAnimatedVideos 1:37 The router knows who belong to the ip-address so why would the router broadcast the request to everyone?

[@HearMeLearn]

@@noodler911 if you're talking about the diagram with the box in the middle and 4 computers, that's not a router that's a switch. Switches don't deal with IP addresses

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You are the best IT expert/teacher because you thoroughly explain the topic with great animation, which enhances learning at a fast pace. With this in mind, I quickly grasp the information after watching your awesome videos. On the other hand, I am in the process of studying for my CompTIA Security+ exam. Please create a CompTIA Security+ exam review video based on version SYO-501.

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Your animated videos are best . Any topic can be easily understood by a neophyte.

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Everyday I wait for your new video... thanks a lot .

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Things look very simple when explained by a good teacher, Thanks a lot

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thanks for taking the time to create these graphics. It's amazing and really helps to bridge the gaps with the textbooks.

[@James_Knott]

One bit of trivia, ARP is actually not part of IP and predates it. However, it was available and did the job. Also, it is not used with IPv6, where Neighbor Solicitation is used. Neighbor Solicitation is part of the IPv6 suite and uses ICMP6.

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Best channel for visual learners

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Wow, why am only discovering this channel now. Your arp tutorial was mindblowing

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You guys always explain things really simply!

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Awesome as always. Brief and crisp... Love ur videos..

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Thanks!

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Thanks eric!

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I've watched a few videos about this subject. This one was the easiest to understand. Thanks a lot!

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the GOAT of internet youtuber

[@fision8090]

I've read a lot of articles about ARM but none explained as well as you, thanks

[@maksteve5451]

ARP not ARM

[@mahatrt]

Wonderful explanation sir❤

[@MrTippanna]

Thank you very much...I have been searching for ARP meaning and function. now I understand clearly..my doubt cleared after watched your video...

[@PowerCertAnimatedVideos]

Glad to hear that...Thanks :)

[@Somabilbooks]

this is University-Distance Much Respects to you sir love you 4ever

[@darioxbrow9223]

ARP protocol An ARP protocol, aka address resolution protocol, is used to resolve IP addresses to MAC addresses. There are basically two types of ARP entries. The first is called dynamic, which is created whenever a computer wants to know whose IP/MAC address it is. So let's say computer A has an IP address but it doesn't know whose address it is, therefore they ask on the network. As soon as the interested computer, so the one that matches that IP address, is found and responds, Computer A will immediately match the IP address to the MAC address. The other type is called static. As we can tell from the name, a static ARP entry is a permanent entry. Why should we use something permanent? We use this whenever we know that two computers will constantly be communicating. If you use the CMD, you'll see there's an ARP cache. In this cache you'll find what devices yours has been communicating with. If there's none, you can still make a new one by writing ARP -r (IP address) (MAC address).

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Great breakdown as always.

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Great explanation.

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This was so good and straight to the point, that I just went ahead and subscribed. Thank You!

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Thank you so much for these explanations! Helps me understand much better than my useless professors in Uni

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Excellent video. Just read about this in my text book, but needed a stronger explanation to get through my thick skull. This did the job. Thank you!

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Your work is flawless

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Who is the first one ?

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Nice Content. Very clear and concise.

[@Alireza13488]

Thank you , great video

[@sochyei1457]

Thank you so much. Very helpful.

[@weishen9511]

Love your lecture clip, now I understand ARP cache. Thanks.

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Great video. Appreciate the info.

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Great teaching...

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Racist moment

[@orion.5611]

ARP is used to acquire the MAC address of the other device.

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you are such an angel. your videos are amazing. i am in love with you. thank you.

[@PowerCertAnimatedVideos]

Glad you like them!

[@AbhinavKumar-dr4ef]

Thank you so much. You explained it so well. God bless you.

[@brandonfarfan1978]

Thanks for this explanation on ARP.👍

[@MrVipulLal]

Clearly explained. Thanks

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Very simple and humble explanation.. thank you sir

[@markspeeps]

Fabulous, how could there be one thumbs down? Thumbs up way up.

[@Kevin-r7f4u]

Great video! I love the animations. If you ever need a future upload idea, would it be possible to update this ARP video and explain/animate the ARP broadcast process for recipient device's outside the sender's LAN? I'm still learning about this, but apparently before sending out the ARP broadcast, the sender will not only look at its ARP cache (to see if the recipient's MAC address is already there), but it will compare its network ID (subnet mask?) to the recipient's network ID to determine if the recipient is local or remote (i.e. outside the sender's LAN). If the recipient is remote, instead of sending an ARP broadcast to learn the recipient's MAC address, the sender will send an ARP broadcast to learn its default gateway's MAC address so that it can send packets that contains the destination MAC address of the default gateway AND the IP address of the remote recipient. It's interesting that it has to work out this way because broadcasts (including ARP) don't pass through routers.

[@unholyallen9572]

This was very helpful, thank you.

[@zubaydee]

As always, you are the best in explaining and make clear!! My question is: While the devices are connected in the same local network, then why a device would need MAC address for talking to each other? They may just use IPs.

[@zubaydee]

I got the answer, devices find each other using IP address but to communicate they need MAC address.

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thank you so much for these videos, i learned alot today from your channel

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Thanks for the explanation ! I'm french and it was totally clear to understand !

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best explanation ever

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Amazing ARP explanation, simple and effective, good job, keep it up!

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great explanation!! Thanks!

[@samantha8178]

Thank you for the simple explanation.