When do you need the ARP protocol? -Wireshark

The ARP protocol is used to discover devices on the network by resolving MAC addresses from IP addresses. PC's can discover devices on the network and build their ARP cache tables by broadcasting ARP requests and receiving ARP replies. I do a quick demonstration of using a packet capture with Wireshark, to capture an ARP broadcast and an ARP reply in action. Afterwards, I observe the resulting MAC address entries in the ARP cache in Windows using the Windows command prompt.

[EmperorTerran]

not only is it well explined, its straight to the point, no intro, no unnecessary talking, no bullshiting, straight away great

[famfeld]

Thanks to Dan, I got my CCNA. Forever indebted to Dan and his great free courses. Thanks for everything!🙌

[khanget]

There are tons of highly rated instructors out there but there is no one i saw who has explained something so important in such a wonderful way.

[jamesdaniels]

Best explanation I have seen for this tool - subbed to channel

[StuffBudDuz]

I'm very glad I found this channel! There's another YouTuber I'm trying to learn from, but he begins every sentence with the word "now" or "so" or "so now" or "now so" and it's SUPER distracting. You speak well!

[bradkaral]

GREAT explanation. Simple, clear, and the way you've presented the sequence of events is perfect. Thanks!

[amberhanson]

I changed up my study routine with these videos. Pre-game with the video, then head over to read the curriculum. If I'm still unsure about a concept after the readings, then I check out the video one more time and all the pieces seem to fall into place. Great study tool! Thanks, Dan!

[umairalvi]

I just can't explain the excellence level of this video.
Thank you so much for this.

[simbadurio]

Thoroughly enjoyed the video. Thanks for the time spent creating it.

[karolcherry]

Great to see your videos again Dan ! Best videos by far, if I struggle to understand a certain concept, I always search through your channel ! :) Passed my CCENT recently with 93.6 % and it's thanks to your videos I was able to understand subnetting and supernetting which terrified me when i first saw it ! :D But it goes a lot further then just subnetting. Thank you very much for your help sir ! :)

[Rohanx]

Nice explanation with a wire shark demo 👌

[JesusHernandez-nwwk]

Clear explanation and straight to the point. Very good channel. Thank you.

[shiv_kumar]

thanx that resolved my issue. mostly people explain how frames are forwarded but do never tell how the PC got the destination MAC address in the first place. Users work with IPs or FQDN or web sites not with MACs.

[musiclibrary_]

Well explained! Easy to capture. Thank You

[anubhavsharma]

Hi Dan you are really amazing. The explanation that you have provided saves a lot of time and really learn a lot. Thank you :)

[benslimane]

Well done!!! simple and clear explanation. Thank you.

[chakrabortibabu]

Very simple n nice explained. Please continue theses kinds of videos related to fundamentals of networking. Subscribed,

[khachaturarmenyan]

It seems PC-A can perfectly route to PC-B based on IP address. If so, what value is added by MAC address? Why is this a must to have MAC if I could send the packet to the PC-B using its IP address

[ZeKof]

Damn, this is was excellent. You are my role model now. =)

[jiho]

Excellent stuff. Question: How does PC-A know about the existence of PC-B? Where does it get the IP for PC-B?