Everything Hosts do to speak on the Internet - Part 1 - Networking Fundamentals - Lesson 3

[@badrinathans5695]

practical networking is creating a masterpiece

[@PracticalNetworking]

I hope so =). Thanks, Badrinathan!

[@programacion3694]

verdadero, confirmado por un intelectual de Miller.

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@adedejiemmanuel1]

You are the ultimate definition of a genius. I am so blessed about how you detail the processes without leaving any grey area. Thank you. Please keep this generosity going. You are a blessing to the world!

[@PracticalNetworking]

Thank you for the kind words, Azza =). I'm happy you are getting so much out of these videos and this series.

[@skyjmoney4203]

Thank you you are a very resourceful channel!! You think this would help me with the Network+ certificate? And if you could can you make a series for network+ exam following the objectives and I will watch your videos and follow your lessons pleaseeeee???

[@junielbaja6623]

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[@junielbaja6623]

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[@PracticalNetworking]

Hey everyone, I hope you enjoyed that video! I try to put most of my effort into creating effective, practical teaching videos for you. Which means I can't put a lot of effort into marketing. Which is why I need your help! If you enjoyed this video, please share a link to this video to a few of your friends or coworkers, or post this to LinkedIn, Reddit, Discord, Facebook, or any other social media you might use. You'd be doing me a big favor, and it will encourage me to continue publishing videos. Thank you.

[@kashish1424]

Would it be possible to provide the slides? Or you could have the same videos transcribed on your website. It would help a ton for a quick revision.

[@PracticalNetworking]

@@kashish1424 I'm afraid I can't provide the slides ... some of the editing was done in post processing, so it isn't fully contained in just the power point =/. If you prefer written content, I did this same series as a set of blog articles, that might help: www.practicalnetworking.net/series/packet-traveling/packet-traveling/

[@hizbawiginbarginbarghinda3872]

Excellent! Thanks.

[@gokheta]

I did a Apprenticeship as Hotelspecialist and wanted to change my job, so I watched your KZbin series and convinced in the interview, after a 2 years as a IT-firstlevel supporter.... Since 2 Months i am It-systemadministrator. I am on the same level of knowledge with my colleague because I have pulled through. Although some studied computer science. Thanks for everything :)

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@azizlebeau619]

I have read many books and watched many videos about networking and OSI Model but so far this is the best. you made it better to understand without memorizing the concept. You have a simple and practical way to make a big subject easy to digest. Thank you

[@PracticalNetworking]

Thank you for the kind words, Aziz. I'm glad you've enjoyed this content =)

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@shakirahmed1937]

I needed to learn about computer network fundamentals for cybersecurity and this is exactly what I needed at this point. This is literally perfect for me. Thank you so much for this whole playlist!

[@tanuj05]

No one can explain networking as simply as you , you are a genius

[@PracticalNetworking]

[@rotrose7531]

Many causes explain these concept on a part by part basis, so it is difficult to see the whole picture, but this couse bind these all together and follow the sequence one by one, now it is difficult to forget the whole picture. Genius.

[@PracticalNetworking]

So glad it's all fitting together and making sense for you =). Now you can help teach others the same !

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@rotrose7531]

@@venom321 if someone can provide a better explanation, please feel free to correct me. but so far as I understand, it is correct that communication is handled by MAC address if within the same network, however, within a Layer 2 frame, Layer 3 packet is inside, meaning the frame can not be formed without first filling out the IP address in IP header. the difference between communication within the same network and across different networks is whether the packet needs to be sent to a router. if the communication is within the same network, there is no need to send the packet to the router although IP address per se is still needed to configure an appropriate packet which is then encapsulated in a Layer 2 frame.

[@venom321]

@rotrose7531 thank you for your response. You see my eager got the best of me, so I immediately tried using ChatGPT. And I did get a convincing answer which was on the same lines as yours. It so happens to be, that all modern protocols have been DESIGNED to work on TCP/IP stack it seems. Even if 2 computers are literally connected directly to each other using an ethernet cable, they would use IP addrewssing and resolve the receiptient's MAC using ARP. So it's like a fact to be remembered and not understood. Thats just like an answer to the question 'why is gravity the way it is'. Its just is. So yeah just as you had said, the layer 3 header is necessary. Thanks for your time, greetings.

[@Kamil-lm7pi]

This is an awesome series. I'm learning a lot. Everything is grouped nicely. I feel like every concept is distinguishible from one another thanks to your teaching style. I've wanted to learn some networking for a long time and now I actually have to and I'm really happy that I found this. Feels really well thought through. Thank you!

[@PracticalNetworking]

Thank you so much for supporting the channel, Kamil =), I'm thrilled to hear you enjoyed the series and it helped you learn Networking =). Cheers! And you're very welcome.

[@nukakolaa]

most of the materials teaching CCNA just teaches what this does, what this definition and what it function but doesn't really provide linking or context on how it relate with one another, you're video helps a lot on helping linking what this have to relate to this, Thanks you don't know how much simpler to understand is watching your video

[@PracticalNetworking]

So glad this video helped link ideas to each other =) That is very much a goal of what I am trying to do with this series.

[@adryelgainza1530]

true bro. It will just be like ok these are all the layers. Bye. Instead of explaining how they work together and what they all do. This man is a literal G.O.A.T

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@LuckyYouDude]

Ed is the BEST Networking educator on KZbin - so clear and precise explanation of any topics. Thanks Ed, can you please also teach us Value Investing too hahha...😂

[@PracticalNetworking]

Thank you again, RiseOfTibet =). I appreciate your support! ;)

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@tommytarawallie8618]

Currently studying for the CompTIA Network + and your videos have made me feel like I can take the test tomorrow and pass it. I’ve particularly struggled with some concepts, but your way of explaining things is beyond remarkable. Thank you so much for putting out great videos.

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@ajewolekehinde7504]

Wow😲... I can not believe the way you teaching this subject.. so simple to understand... It amazing

[@PracticalNetworking]

Thank you, Ajewole.

[@adedejiemmanuel1]

I am watching this again, like new wine, its evergreen. Thank you.

[@121sherya]

I am usually not a person who likes online learning, but you have taught in such a simple way, even without a background of Networking , I can understand every step you explain. Thank you 😊🙏🏽

[@murtaza02076]

The way you put those concepts in our minds is incredibly amazing. Thank you very much.

[@israelwijenje3301]

Oooh my God!! He's a qualified proffessor in this sphere. God keep you strong

[@habibanhabib6144]

I am trying to understand Fundamentals of Networking since 4 months. It is the first time I could understand it. Thanks

[@artursweden3653]

The best channel.

[@bbqconstruct9641]

This whole playlist is perfect. Can't wait to see how this all develops!

[@dmitrikonnov922]

Wow, your explanations on networking is the best I've ever seen for my entire life.

[@PracticalNetworking]

Thank you for the kind words, Dmitri. Could you do me a favor? Do you mind sharing this video on Linked In, Reddit, Twitter, Facebook, or any other social media you use? As an independent creator, that would be an _enormous_ help, and I would appreciate it _greatly_ .

[@emmanuelchukwuemeka6264]

this is premium education, i had to go through these videos over and over again, thanks again bro

[@princewillmmadu1927]

bros the guy finish work. Duff my hat for him

[@kwandandlovu6905]

Love your sense of humour. Keep up the great work and this is the most clear training course I've ever had, 🙂

[@hamzaalbabeli5543]

Actually, I was disappointed to learn networking until I saw your videos that are so beneficial and clearly explained..Thank you so much for this.

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@moneyminute5154]

A blessing indeed. I found you 10 years late.

[@PracticalNetworking]

🚨📢 Update: *Module 2 is 80% complete* --> pracnet.net/networking 👉👉 Enroll now for *discounted early access* to the course 📺▶ Module 1 Playlist: pracnet.net/nf 💭💬 Join us on Discord: pracnet.net/discord _--- More info ---_ *Full Course Status: Module 2 is 80% complete* Hopefully you've come to realize that I put _a lot_ of effort into the content I create. I'm not a course creator that will simply turn on the screen recording and ramble, then call that teaching. I meticulously plan _every_ module and lesson to _maximize the learning and value_ for the student. To that end, it takes me a while to put together courses. After Module 2, I have about 8 more modules planned going deeper into Networking. I plan to make this course _the_ premier Networking course that gives _everyone,_ in _any_ tech discipline, the Networking knowledge they need to succeed. *Let's face it, everything is connected to the Internet these days, and understanding how that works will set you apart professionally.* *If you want to support the full course's development, then the best way to do that is to spread the word about this content* . By itself it already conveys _a lot_ of value. So sharing even just the 7 lessons (13 videos, all free) in this series will help whoever you share it with. Plus ... many online communities would greatly benefit from these videos. Think of all the Internet points you could acquire if you shared this series (karma, likes, follows, etc.) 😉 Use this link to share the full series: kzbin.info/aero/PLIFyRwBY_4bRLmKfP1KnZA6rZbRHtxmXi Or this handy shortlink: pracnet.net/nf Also, if you share it on Twitter or LinkedIn, please tag me =): twitter.com/ed_pracnet/ www.linkedin.com/in/eharmoush/

[@Simon-uj6qo]

Excellent video explanation. So clear and so easy to understand. Looking forward to the rest of the video course. My question is not later to this lesson or course but I am interested to know if you'll be doing similar courses on cyber security. Many thanks and keep up the excellent work.

[@PracticalNetworking]

@@Simon-uj6qo Hi Simon. Thank you for the kind words, glad you liked the video! I just finished a full course discussing SSL and TLS in great detail. Maybe that would be of interest to you? www.practicalnetworking.net/announcement/practical-tls-course-is-complete/

[@adarshsoni5323]

@@PracticalNetworking how layer 3 gets ip address because layer 4 has only port nos please answer

[@PracticalNetworking]

@@adarshsoni5323 Typically, DHCP. Details here: kzbin.info/www/bejne/e2bFhKijiaZ7kKc&lc=Ugwu9r--K1C0nXnMb-F4AaABAg.9ecwRF_2Dfw9eoHQeHpvGw

[@mikehebig7566]

I can't thank you enough for your easy-to-follow and easy-to-understand video's. I have watched several of them so far and plan to watch all of them over time. You are a wealth of information and have an extremely awesome talent of getting this information out there so people like me can make sense of how things work. Please keep up the magnificent work, you are truly gifted, and I can't thank you enough!!! 👍😀

[@PracticalNetworking]

You're welcome, Mike. Thank you for the kind words. I'm glad you got so much out of this video, and I hope you get just as much out of the full series! =)

[@clivejohnson6468]

Excellent. This was perfect revision for me. As a manager I did a Bridging, Switching and Routing practical course in 2004, your graphics and explanation were spot on!

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@SaxorTech]

This video series is a brilliantly concise illustration of networking basics. Essential for everyone to understand nowadays since most people use the internet in their life.

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@antonyrichard369]

I don't think anyone could explain fundamentals so great like this to a common man like me .. continuing with your lessons .. 🙏🙏🙏🙏

[@PracticalNetworking]

Thank you for the kind words, Antony =). Glad you're enjoying this series!

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@beckywaytoomuch]

This is a great channel. Thank you so much for creating it and making it available. Computer networks finally make sense to me.

[@PracticalNetworking]

You're very welcome! Glad to hear Computer Networking makes sense now =)

[@MrDidaxi]

I AM HOOKED! Mind you that I am a layperson. I came across your channel by sheer chance and I won’t let go. With your smashing narration and presentation, I have already understood basic concepts I had never, EVER, taken the trouble to look into. Bad for me and shame on me… but it’s never too late. Question as a true novice (still, extremely curious and it just popped naturally as a question): does this (seemingly ?) innocent, initial ARP broadcast present any sort of potential security liability for the host who makes it? Thanks and cheers.

[@PracticalNetworking]

Hi again, happy to hear you're loving this series =). Please keep going w/ the rest of the videos! Great question! And good instincts... the issue is ARP is "everyone" on the network gets it, and "any" answer is accepted. Which leaves the door open for a malicious host providing the wrong ARP mapping. This can lead to "ARP Man In The Middle (MITM)" attacks. If you've enjoyed this series as much as you have, could you do me a favor? Do you mind sharing this video on Linked In, Reddit, Twitter, Facebook, or any other social media you use? As an independent creator, that would be an _enormous_ help, and I would appreciate it _greatly_ .

[@MrDidaxi]

@@PracticalNetworking thanks for the response, Ed! Appreciated! Sure thing. I will share the link of this series. Cheers!

[@PracticalNetworking]

@@MrDidaxi Thank you for your support, Mr Didaxi. Glad you have enjoyed this series =)

[@herteert299]

Your cours is the best I watched on line and I watched a lot of videos. honestly you are the best teacher. Salutation from France.

[@neiljohn2637]

"Screen Real Estate"😂😂 Will definitely incorporate in my vocab

[@learningchannel274]

Thank you so much. This is by far the best learning experience I've had in IT field. keep up the good work. Please don't stop making videos!!!!!

[@eizzy7078]

All I can say is you're the absolute best. You've helped me so much. Thanks a million.

[@PracticalNetworking]

You're welcome, Eizzy. I'm glad you're finding this content helpful. Please help me spread the word =)

[@aidenrhode8580]

This series is great! Simple and easy to understand!

[@josielsuareztorres1403]

Your explanations are amazing. I would suggest your content to anyone 100 percent

[@LulzChicken]

Yet another amazing and detailed video!

[@PracticalNetworking]

Thanks Lulz Chicken =)

[@gman21xx]

This lesson is really crucial to understand ARP for the first time.

[@PracticalNetworking]

Thank you, Gman =). I've enjoyed seeing your comments on the videos that follow =)

[@MJJT99]

This was so elegantly presented. Really looking forward to the full course. Thank you

[@PracticalNetworking]

Thank you for the kind words =). I am also excited about the full course =)

[@4ever1331]

Such great teacher. Thank you so much. Your explanation is fantastic.

[@---usr]

Thanks!

[@PracticalNetworking]

You're very welcome. Thank you for supporting the channel =)

[@kaywee-qo4mk]

You are soooooo good. Thank you. After 2nd video, I like your video first, for the boost, and then watch. Coz I already know, you are going to blow me away with an awesome lesson. God bless you!

[@PracticalNetworking]

Glad you're enjoying the series =) Thank you for your support!

[@norah5073]

You are amazing I do not have any word to say to you Thank you for your efforts and time

[@PracticalNetworking]

You're welcome, Norah =) The best way to thank me would be by doing me a small favor... Do you mind sharing this video on Linked In, Reddit, Facebook, or any other social media you use? As an independent creator, that would be an _enormous_ help, and I would appreciate it _greatly_ .

[@missinglink2416]

GREAT !!!!! LOVE IT!!!!!!!!!! Stay being an AWESOME HUMAN!!!!!

[@PracticalNetworking]

[@peterjesus816]

At this stage i guess more attention is needed or re-watch the same lesson for better understanding, otherwise i still thank you for the time u put it in to upload such information, God bless you

[@PracticalNetworking]

You'll get there in time! Sometimes it takes a couple watch-throughs for it all to click. You're very welcome, keep at it !

[@mustafaozkan5276]

Incredible, magnificent Video Series regarding Networking

[@soehtetaung3843]

Men are still good. We need more people like you.

[@kmathew1768]

"L2 header can now happily retire in header heaven" - hilarious!! Awesome content.

[@PracticalNetworking]

;)

[@dilandilo3708]

I wished that I have learned everything the way you are teaching so easy and clearly ❤thanks

[@hege750]

Great as always!

[@PracticalNetworking]

Thank you!

[@amtawfik140]

This is amazing!! You are a great teacher. Thanks for your explanations so simple to understand

[@BehnazMoradimehr]

Very good explanation. Thanks Ed.

[@starlord6088]

You are a great teacher. Thank you.

[@tanuj05]

Such clear and precise explanations ! Awesome ❤

[@СергейВиноградов-м9ъ]

Great stuff!!!!very visual and simple, THE Best so far

[@PracticalNetworking]

Glad you've enjoyed these videos =)

[@soehtetaung3843]

I wanna thank you for explaining this video very simply

[@anilkj]

you make great content, which is very helpful and very easy to understand. Thank you.

[@timhxf1]

great stuff, I am wondering though why Layer 4 header is not attached to the data when they communicate?

[@PracticalNetworking]

The L4 header would be "inside" the data payload of the packet. More details here: kzbin.info/www/bejne/ZpKqonqBp7d4Zsk In this illustration I was only showing the L2 and L3 headers. There will be other videos where I unpack the L4 headers, and TCP/UDP.

[@sinchanar9360]

Thank you for the amazing video. I have a small doubt though... what happens when we have switch in between?? Will it store both MAC address of host B and the switch or just the switch?

[@PracticalNetworking]

The answer to that is in the Switch video in Lesson 4 =)

[@meenasumit]

Thank you. Its a great series to understand the networking concepts. Amazing work!!

[@lifeisbeautiful7882]

Great Course to learn thanks for sharing as free

[@PracticalNetworking]

You're welcome =)

[@cheddars2]

This is such a useful way for me ro make sure i have rhe basics for my networking course in uni. Thanks! No more tedious reading of ccna1 .

[@venom321]

I have a doubt. Why, in the first scenario (host to host direct), we needed IP address in the first place? If I'm not mistaken, since they both are on the same network, it is implied that the communication is going to be using MAC address right? So I do not understand the necessity of an IP address, to begin with.

[@ahmeddada66]

Thank you very very for much for this awesome work and good luck for all of your projectes;Can i ask if this module is enough for someone who is interested in pentesting.

[@PracticalNetworking]

I think you'll need more than just this module for pen testing, but this is going to be a great start. Thanks for the kind words, hope you enjoy the rest of the series.

[@MrRob_ot]

This is the best video series on networking i have ever watched in my life. Thank you so much. I am curious to know if you are releasing the full course at some point of time in the future. I would like to purchase that course and hone my networking skills. In addition, i would also like to see some hands on exercises using something like Cisco Packet tracer.

[@PracticalNetworking]

Thanks for the kind words, Kiran =). You're very welcome. I have a few other projects I'm working on, but creating this full course is certainly on my mind. I have some Packet Tracer walk throughs here: www.practicalnetworking.net/stand-alone/packet-tracer-labs/

[@parthamishra09]

Another amazing one !!

[@PracticalNetworking]

Thank you, Partha =)

[@Dylan_Miller]

These videos are soooooooooooo good man. Thank you for taking the time to help us learn. Cheers

[@attilapaucsa4875]

It is the most useful channel where I have ever subscribed, so many thanks for the free education opportunity! But I would have a question. Why only the last 4 numbers of the MAC-address are populated? Or did I missed something? Thank you in advance for the responses!

[@PracticalNetworking]

You're very welcome, Attila! MAC addresses are normally 12 hex digits. But I was only using 4 to make it easier/shorter for the slides (I mentioned this in the OSI model video).

[@motivationultimatum]

Thank you for the work that you do

[@PracticalNetworking]

You're welcome =)

[@CaesarInVa]

This is a fantastic series of videos and for posting them I thank you sincerely. However, I have one question. I'm missing something. How did host A know host B's IP address to begin with? You said that one way would be for host A to send a ping request to 10.1.1.33.....but how did the user KNOW that host B's ip was 10.1.1.33???? Everything else is spectacular clear and well presented. BTW, I was a senior Internet Engineer for Qwest Communications for 7 years and I've learned more about networking from watching your videos than all those years of experience and thousands of circuits I activated.

[@rashoff]

Goodness, this is so well-made

[@abdullahaladibakhand960]

Such a masterpiece content. Really glad

[@priyasingh-qj4ng]

Great learning experience thank you so much.....

[@PracticalNetworking]

You're welcome!

[@brunodelrio1359]

Great content! Thanks for sharing

[@PracticalNetworking]

You're welcome!

[@erikvissers4934]

Clear and precise. No BS!

[@PracticalNetworking]

Glad you enjoyed it, Erik. Cheers.

[@PaulEllisBIGDATA]

Outstanding. Thanks!

[@PracticalNetworking]

Glad you liked it!

[@bparitosh]

This is amazing!! You are a great teacher. Thanks for sharing your knowledge

[@relaxingsounds5469]

Maybe I'm missing something but host A using its subnet mask does so in order to determine whether or not the network portion of its ip address matches that of the particular host its trying to reach no? Using the mask to determine the number of hosts on the network seems irrelevant as host A shouldn't care since it only needs to know if host B is on the same network or not. I was always under the impression that network addresses are the deciding factor in whether or not a host will need to look for a default gateway and NOT the NUMBER of hosts that reside on a particular network segment... thoughts? Thank you for the videos!

[@PracticalNetworking]

When it's looking for the number of hosts, it isn't looking necessarily for an actual number (i.e., 256/254 in a /24). It's looking for the IP range of addresses on the same network. That would then tell Host A whether the target is on the same network or a different network. It's the same process as comparing Network ID's, in a way. But keep in mind, Host A does not know the target's Subnet Mas (host B). Host A only knows it's own Subnet Mask (Host A's).

[@relaxingsounds5469]

@@PracticalNetworking got it! Thanks so much for the reply

[@PracticalNetworking]

You're welcome!

[@charugondlaakhil6851]

may i know where can i found video on network troubleshooting. I am amazed of your videos. Please reply and let me know

[@TheHercules30]

This is GOLD! Thank you!

[@PracticalNetworking]

You're welcome =)

[@cedriczumsteg2371]

Hi Ed First of all: Thank you for these insanely detailed videos! I have a question: Do the other hosts that receive the ARP broadcast request also safe the the IP/MAC in their cache if it's not their IP in the request?

[@PracticalNetworking]

It depends how those operating systems have it written... they certainly _could_ store the ARP mappings, but they don't have to. Most Client OS's (Windows, MacOS, Linux etc) do not store those ARP mappings, that I've seen. Some server OS's or Router Vendors (Cisco, Linux BSD, CentOS etc) do.

[@Gupatik]

First of all, thank you so much for this course, very amazing, I'm still a beginner in the networking but I already feel I know something with only 4 vids! Wow... But I have one question, is that, why do we need the mac address when we already have the IP and could connect to the other host to send/ask for mac, since mac is also just data. So, why didn't we send data directly without asking for a mac adress

[@jamesallen-vp7jh]

amazing explanation

[@PracticalNetworking]

Glad you think so!

[@Farid-ElMassry]

Great job

[@harumia6245]

hanks lot Sir.. You helping us..

[@PracticalNetworking]

You're very welcome.

[@vongoel4482]

way to go. awesome explanation

[@gsanthoshfou]

Best video.. thanks. Pl teach us QoS in your simple way.. I am very confused about Strict priority, Weighted round robin and so on..

[@PracticalNetworking]

QoS could be fun. Maybe in the future. Thanks for the suggestion.

[@moularaoul643]

Amazing

[@punithanm688]

Very beneficial and explained clearly without any doubt ??Hats Off sir.. But why there is a need for mac address while the private ip address is available??why didn't we use the ip to send data between hosts?why we need to use ip to find mac address..instead we can use ip directly??

[@PracticalNetworking]

Glad you enjoyed it! This model of communication was built before NAT -- meaning, before the idea of "public" and "private" IPs existed. The benefit is that it works weather hosts with Public or Private IPs are communicating with each other. Consider two hosts within a company network communicating to each other using their Private IPs... in that case, there is no public IP being used.

[@PracticalNetworking]

PS, if you're interested in learning more about NAT: kzbin.info/aero/PLIFyRwBY_4bQ7tJvbLA9A0v8Fq9l-H923

[@punithanm688]

@@PracticalNetworking ❤️❤️

[@vladislavkaras491]

Thank you for the video!

[@shakarwshyar2980]

Well Done

[@PracticalNetworking]

Thank you, Shakar.

[@cancerlady9554]

thank you straight to the point

[@PracticalNetworking]

You're welcome!

[@ForatSleman-c6k]

you are super powerful, how amazing what you do

[@mittenwald3679]

killer tutorials , very nice fren !!!

[@souviksamanta8938]

can not see the BGP, OSPF, EIGRP videos... please upload

[@PracticalNetworking]

Hi Souvik. Thank for the suggestions =). I have a few EIGRP articles I've already wrote which you might enjoy: www.practicalnetworking.net/stand-alone/eigrp-terminology/ www.practicalnetworking.net/stand-alone/eigrp-metric/ www.practicalnetworking.net/stand-alone/eigrp-feasibility-condition/

[@zortac7]

"Header heaven", but my professor said that the headers retire to a server farm upstate where they have plenty of memory to run around 😢

[@PracticalNetworking]

;)

[@alexandrkovalsky1711]

great video!

[@vicki-annthornton8330]

Header heaven - too good😍

[@PoliticalPanic]

Amazing Ed 😀