OSI Model: A Practical Perspective - Part 2 - Networking Fundamentals - Lesson 2

Module 1 of the Networking Fundamentals course will illustrate the core of networking: How data moves through the Internet. The foundation of that is understanding the OSI model.
But this isn't about mere memorization, instead we are going to look at the underlying goals of each layer of the OSI model, and how it contributes to the over all goal of networking: Moving data between hosts.
This lesson is a free lesson from my new course on Networking Fundamentals. The first module of this course is meant to teach you everything you need to know to understand how packets move through a network. All the lessons for the first module will be released for free here on KZbin:
=== Networking Fundamentals - Module 1 ===
Lesson 1 - Network Devices
Part 1: • Network Devices - Host...
Part 2: • Hub, Bridge, Switch, R...
Lesson 2 - OSI Model
Part 1: • OSI Model: A Practical...
Part 2: • OSI Model: A Practical...
Lesson 3 - Everything Hosts to do speak on the Internet
Part 1: • Everything Hosts do to...
Part 2: • Everything Hosts do to...
Lesson 4 - Everything Switches do to facilitate communication
Part 1: • Everything Switches do...
Part 2: • Everything Switches do...
Lesson 5 - Everything Routers do to facilitate communication
Part 1: • Everything Routers do ...
Part 2: • Everything Routers do ...
Part 3: • Router Hierarchies and...
Lesson 6 - Networking Protocols
- • Network Protocols - AR...
- ARP, FTP, SMTP, HTTP, SSL, TLS, HTTPS, DNS, DHCP
- Four items MUST be configured for Internet Connectivity
Lesson 7 - How Data moves through the Internet
- • How Data moves through...
- Interview question: What happens when you type "site.com" into a web browser?
---
If you enjoyed this content, then please tell one other person about this series. At the end of the day, sharing this content is the best way you can thank me and return the favor for this free content. You can get free Internet Points (Karma, Likes, etc) by simply sharing this content across social media communities. =) Thank you.
---
🖧 Full Networking Fundamentals series (Module 1 - all FREE):
• Networking Fundamentals
📇 Details about the Full Networking Fundamentals Course:
www.practicalnetworking.net/i...
📜 Studying for your CCNA?
www.practicalnetworking.net/i...
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• Practical TLS - Free L...
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💬 Discord: / discord
#networking #ccna #network #osi #switches #routers

[@PracticalNetworking]

🚨📢 Update: *Full Course is Under Construction* --> pracnet.net/networking 👉👉 Enroll now for *discounted early access* to the course and a chance to help shape its content. 📺▶ Module 1 Playlist - Networking Fundamentals: kzbin.info/aero/PLIFyRwBY_4bRLmKfP1KnZA6rZbRHtxmXi 💭💬 Join us on Discord: pracnet.net/discord _--- Original Comment below: ---_ *Full Course Status: Wait and See.* 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. If I'm going to dedicate the time, resources, and energy to putting this full course together, I need to know that there is enough interest in the full course. I'm rating that by how wide a reach this series achieves. *If you are interested in seeing the full course developed, then the best way to bring that to fruition 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) in this series will surely 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 Also, if you share it on Twitter or LinkedIn, please tag me =): twitter.com/ed_pracnet/ www.linkedin.com/in/eharmoush/

[@preethidonthu2433]

sure! and thank you for your amazing videos they helped me a lot!

[@PracticalNetworking]

@@preethidonthu2433 Happy to help!

[@saadowain3511]

Ofcourse we will do

[@rotrose7531]

Of course we will do.

[@PracticalNetworking]

@@saadowain3511 Thank you, Saad.

[@mertcancam]

Please never give up on this channel. You are an amazing instructor.

[@PracticalNetworking]

Thank you, Mustafa =)

[@swsch3380]

Reis naptın

[@zlatkasasheva7568]

Absolutely agree with you!!! ❤️❤️❤️

[@brentbeers7473]

I took a Cisco Networking Academy and received my CCNA last year but never understood networking through that course. The way you explain the information around all of these networking concepts is so much better. I knew what ports were but never knew the why/how behind them. You're explanation just drove that home for me. Thank you for this content. Easy to understand.

[@PracticalNetworking]

Hi Brent. I'm so happy this content has helped you better understand networking. You're very welcome =)

[@BenNottelling]

I'm dealing with the same thing right now. The e-learning that Cisco provides is horrible and I'm always left confused at the end, I really wish I had done the research to buy the other options beforehand

[@PracticalNetworking]

@@BenNottelling Sorry to hear you're having a rough go with the Cisco content. I used to teach Cisco and had many issues with how they created learning content. It's part of why I decided to set out on my own. In any case, glad you're enjoying this content, Ben =). If you're going for the CCNA, all my CCNA related content is available here: pracnet.net/ccna

[@aireddy]

This is very clear and crisp. Visuals really awesome. I shared with LinkedIn community.

[@BALLOUTIV]

A Cisco CCIE is training me and recommended this course for me. Now I’ve been studying these videos and my teacher is the CCIE.

[@KA-fl6qt]

You are the first teacher to teach OSI model without acronyms . This is amazing. How can some people teach so well? I think anyone that is scared of networking will get a big relief with the way you explain things. wow incredible.

[@PracticalNetworking]

Thank you for the kind words, Kofi. =)

[@fmtuby]

Not everyone has the ability to make complex topics as easy as 1, 2, 3. You are a Legend mate!

[@PracticalNetworking]

Thank you for the kind words =)

[@kjetilandre]

Best explanation I've ever seen on networking layers

[@PracticalNetworking]

Thank you, Kjetil. Tell your peers about this video =)

[@scottspa74]

It never fails to blow my mind how all of these steps of encapsulation and de-encapsulation happen nearly instantaneously, with rarely a hiccup. Also, Ed is a fantastic instructor. Very clear descriptions and super useful visuals. Better than the 3 quarters of Cisco 200-301 content in college.

[@PracticalNetworking]

Thank you Scott =). Yes, it's amazing how much happens that we don't even know is happening. I agree 100%

[@dragonbg6105]

Masterful explanation. Made this pretty complex topic actually feel simple. I am understanding networking better than ever before. Your teaching style is exactly on point. There is this build up which really makes learning interesting. You are a master of your craft. Thank you for this series.

[@PracticalNetworking]

Thank you for the kind words, Dragon. That means a lot, and I am thrilled that you enjoyed learning Networking from this video. Hope you enjoy the rest of the series as well!

[@bbqconstruct9641]

I now understand what this all means and not just by rote memorization. Best YT teacher I've seen!

[@matrixlnmi169]

What I did not learn during my academic course + 17 years of experience, I learn with this video. Amazing video !!! Please continue your teaching 🙏

[@PracticalNetworking]

Thank you for the kind words, Matrixlnmi. Glad you enjoyed this =)

[@piyushsarraf9994]

Sir this is pure gold content that we are getting for free, tysm

[@PracticalNetworking]

You're welcome =)

[@wayneinteressierts9973]

There are so many sheetty teachers. You‘re just a hero! Thank you so much for your dedication! It really helps a lot!

[@PracticalNetworking]

You're welcome, Wayne. Glad you found this content helpful =)

[@scorpioshub9440]

You @practical Networking !!! Whoever you are, I really want to make a bow for you.

[@PracticalNetworking]

Glad you've enjoyed the content. Please help me spread the word about this series =)

[@muhammadafifgunung172]

This is an excellent video (and course!_, probably the best on explaining the OSI and Network Communication

[@PracticalNetworking]

Thank you, Muhammad. I appreciate you saying that =)

[@EvanSmoak]

Videos are great, keep it up.

[@PracticalNetworking]

Thanks Elliot. Glad you like them =)

[@devadarsan.a.m7835]

It's been 2 years since this video has been posted! I almost got all my doubts cleared in just a few hours. I figuratively speechless by looking at the level/depth of content you have provided. Thank you very much

[@PracticalNetworking]

Thanks for the kind words, glad you enjoyed this take on the OSI model =)

[@himanshubhusanrath212]

The simplicity of the explanations in this video is beyond imagination. Thank you so much for this content !!!❤

[@muhsen2011]

I have watched a lot of KZbin videos about OSI model, never made sense to me until I watched this video. You are the BEST!!!

[@PracticalNetworking]

So glad it's helped you, Ferhana. Thank you again for the Super Thanks =).

[@josemorris1790]

You are a great tutor, keeps concepts simple and interesting, thanks

[@PracticalNetworking]

Thank you for othe kind words, Jose =)

[@charugondlaakhil6851]

My Heart is over whelming with lots of Happiness when i am passing through these videos. whenever i attend interview i feel how to answer for this OSI question. But you made my day. I help you in growng your channel by recommending people.

[@coconutcove5551]

You are genuinely one of the best instructors I have ever listened to. The way you explained what each layer's purpose was and how it contributed to each step of the delivery process is simply perfect. I've read and learned about the OSI models and how it works, but I never truly understood the process it goes through until I saw these few videos. I can't thank you enough.

[@elvisyonka5027]

I seriously think you are so gifted, an instructor with unmatched class, you exist in a unique lane, wow!!!!! how you achieve simplicity in complexity baffles my mind, never give it up. Thanks

[@PracticalNetworking]

Thank you for the kind words, Elvis. I appreciate the kind note and am happy you are enjoying this series.

[@maryheyligar7855]

You are great. Not even my instructor could explain this as clear as you did

[@DanielPflager]

this content author knows both his material AND how to teach. Much respect and gratitude to you, Herr Doktor!

[@axelbaseggio6094]

I have to thank you for these videos. Until recently, I was somewhat frustrated because I couldn't quite understand what my teachers were trying to explain, but now I see everything so clearly

[@k.a.gunaratna]

I was interested in learning network, but felt that it was difficult. But with your these videos i learned easily from the beginning, without having any idea on networking. Thank you very much. I am from Sri Lanka.

[@wwolfram33]

Fantastic! I appreciate how you simply tie and explain how the components work together to create a working network. The videos will greatly help me remember the components roles and tasks. Thank you!

[@PracticalNetworking]

Hi Ward. Glad you enjoyed the video =). You're very welcome!

[@PP-jv1ou]

I've been struggling with these osi model for 2 weeks and u make it all clear to me in 20 mins. Now, I find it fun to learn after watching these. Thank you so much.😭😭🙏

[@Zenandchill1111]

I felt so lost during my courses I watched your subnetting video first and since then I’ve been hooked watching your videos .. the way you explain the process is so easy to understand . Thank you for these videos

[@alkanadakaner]

Thank you so so much. Amazing explanation and visuals. You're explaining everything wonderful. Much better than my teachers.

[@PracticalNetworking]

You're very welcome, Alkan. Glad you enjoy them.

[@hariharanmanivannan897]

Simply amazing . I surely can say that you are one of the best instructors for the networking topics. I have watched many of your videos and your explanation is brilliant . Thanks a lot .

[@sharkwar9050]

Great Explanation

[@PracticalNetworking]

Thanks Sharkwar !

[@Diarougha27]

i was confused untill i started watching your videos. come at the right time. have an interview with google in morning . all i have now is confidence. thanks again

[@PracticalNetworking]

Glad this helped! How did the interview go?

[@archanakannan2566]

Brilliant session! Thank you so much for making the concepts so easy and understandable! May you go a long way!

[@mcsleverrrflowers4849]

This is by far the best break down of this information i've ever seen. Thank you!!!

[@PracticalNetworking]

You're very welcome =)

[@blachance06]

These videos are amazing! You break the OSI model down so well the light bulb clicked! Thank you!

[@PracticalNetworking]

Cheers =) Glad you enjoyed it. YOu're very welcome.

[@franceleeparis37]

The difference between you and an engineer is that you can explain things far more clearly. If, however, you are also an engineer then you are an exceptionally talented one.... great videos..

[@PracticalNetworking]

I like to think I am still an engineer =). Glad you enjoyed the videos, Francelee!

[@LockwoodStars]

Pure Gold Content. Wish we had Video 30+ years back... While doing Polytechnic (3rd year in 1989) in India, I have read Computer Networks written by Author Tanenbaum. I think it was pre-www. I spent many many hours and tried hard to picturize OSI model in mind and understand. Later while doing my Engineering (after 3 years) I had same Network subject with more chapters (around 1993) and still could not visualize how the OSI layer works.. Same story while doing executive course. I have to go thru same subject again. Wish this video was then during my college days... I am not network engineer but I was always curious How really this works.. And this video is blessing to me, as it solidified my networking visualization. Million thanks.

[@suvojitdhole8340]

This man is a legend. I have been through numerous videos to learn networking fundamentals, but this is GOLD!!!!!!

[@lorenzococcia8665]

If you did a CISSP series like this, I'd pay you lol. I mean... this is beyond amazing. hope you get everything you want in life!

[@audionerd8821]

This is the best explanation and series of courses on Computer networking. Ive seen so many and this is the first time i'm actually fully understanding what is being explained.m Great delivery. Thanks for creating and sharing!

[@PracticalNetworking]

Thanks for the kind words =). Glad you enjoyed this!

[@marieann5828]

The best OSI model explanation!

[@PracticalNetworking]

Agreed ;) But, maybe my opinion is biased. Cheers, Marianna!

[@thedhirajkushwaha]

Thank you very much for making this amazing tutorial series.

[@PracticalNetworking]

You're welcome, Dhiraj.

[@rotrose7531]

For me, there are two go-to resources on youtube, jeremy's IT lab or THIS Channel. I really hope you can continue to upload these amazing tutorials for us.

[@PracticalNetworking]

[@danhnguyen1468]

I was struggling to understand OSI model and couldn't grasp the big picture. This video and the previous one were SO helpful, I was able to have a much better understanding of the OSI model. Thank you so so much!

[@aja9388]

I'm so grateful to you. Your lessons are very easy to understand due to the way you present and explain them. I am currently taking a course on Computer Networks at the university and I understood practically nothing and did not see the connection between the topics, since they load you with a huge flow of information and everything is written in a complex way and it isn't shown how these topics are related to each other. It's like they're giving you puzzle pieces without telling you what picture you're supposed to complete at the end. And you don’t understand what to do with this mountain of puzzle pieces. Thanks to your videos, all the pieces of the puzzle fell into place.

[@TheLordWhoSeesMe]

I can't thank you enough. I have been learning OSI layer for the past 2 yrs. Finally landed up here and understood it. Please accept my heartfelt thanks. ❤️

[@PracticalNetworking]

I accept it humbly. Glad this way of explaining it made it click. Cheers =)

[@grtechnology1584]

So far, I am watching your third video and loving it. This kind of simple and informative content I can't get from anywhere else.

[@PracticalNetworking]

Glad you're enjoying the series =). Please help me spread the word about this content =)

[@negidhruvl]

I have seen so many videos to explain the OSI Model but nothing as simplified as your content. This is so well explained.

[@PracticalNetworking]

Thank you, Dhruv. Glad you enjoyed this method of explaining it =)

[@adedejiemmanuel1]

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

[@missinglink2416]

your illustrations are the best!!!! thanks for being alive!!!!!

[@PracticalNetworking]

[@lueher0]

thank you so much! great explanations and visuals. would love to see a more in depth guide on layer 5,6,7 sometimes in the future.

[@PracticalNetworking]

You're welcome, Lue! Noted about L5-7.

[@jinayshah4215]

+1 interested in layer 5,6,7

[@zaharib]

Same here 🥰

[@kassimgazali4430]

Dude your amazing ! I hope you know the amount of people who appreciate you everyday you are loved 🖤

[@juddandres7626]

Thank you! big help for a newbie like me. may God bless you more for creating free videos of this.

[@PracticalNetworking]

Cheer, Judd. Glad you enjoyed it. Hope you enjoy the rest of the series as well.

[@boratube998]

Thank you men, what you simplified is a thing which seems simple but even for senior network experts hard to explain

[@kimyildiz3743]

Through my 3 years bachelor in computer science I never understood the osi model until now, great explanation!

[@basakburakci1698]

Finally, a nice English video that simplifies everything and makes us understand the content really well

[@gnuPirate]

One of the best instructors out there! I like the original OSI model over the later model, even if some of the higher layer distinctions are redundant now, because I think it does a better job of conceptually clarifying what is going on in a more segmented way. I hope your later videos pick apart the distinctions of the top layers.

[@CEBMANURBHAVARYA]

uff your vides and explaination, too good. with you animations, I am able to visualise and remember these layers

[@Honkytonkrob]

High speed network technology is incredible. I am taking a Uemdey course on networking and had to find these videos to better understand. You do a fantastic job. Thank you.

[@baileyspooner9568]

Keep up the great work, I’ve learned more in the last few videos than I have all year

[@bhattketan8307]

Simply perfect, I have seen many videos of OSI model but yours is best.

[@andyofei9179]

Watched several videos in the past on networking/OSI model. Almost all sounded the same and did not make any real sense to me. This video tutorial in my opinion is the best I stumbled upon. You are indeed exceptional at what you. Not everyone can simplify topics this way. Thank so much for this content.

[@aranya96]

Master of the Master. If I would get these videos before in 2016 I would be CCIE by now. Thanks for your effort and God Bless.

[@PracticalNetworking]

Heh, yea, me too! If I had these in 2008 when I first learned networking, I too would be a CCIE by now ;)

[@aranya96]

@@PracticalNetworking I really appreciate that you made your precious video for free ❣️❣️❣️

[@PracticalNetworking]

@@aranya96 I wanted folks to learn Networking the way I wish it had been taught to me. =)

[@RobertoMassucco1978]

This playlist is pure gold! Thank you!

[@PracticalNetworking]

Glad you are enjoying it =) You're welcome

[@ForeverChip03]

U are the best. Thank you for your thorough explanation

[@adamhunter5559]

I've looked a lot for a course that would help me understand network fundamentals, but none of them clicked with me, then comes this course which blew me away by how good you are, sir at helping me understand every single detail, so thank you.

[@DG-fs1pq]

You are hands down THE BEST instructor I have come across on KZbin. You make all of this so easy to understand. I have an MBA and MS in Cybersecurity, but never understood this material as in depth until now. It always pays to take a look at the fundamentals from time to time. You have helped me to understand some more difficult concepts by explaining the fundamentals this way. Thank you!

[@PracticalNetworking]

Thank you for the kind words David. I'm very happy that you learned so much from these videos. You're very welcome. 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_ .

[@DG-fs1pq]

@@PracticalNetworking Already done, thanks.

[@PracticalNetworking]

@@DG-fs1pq Thank you David. I appreciate your support =).

[@Gogo__b]

you are amazing!!! I have been trying to understand the whole concept of networking for more than 2 months but it never assimilated until I found your content... its not only explanatory its fun learning. I spend more reading time and always look forward to opening your channel. thank you so muchhhhh.

[@PracticalNetworking]

Yay Ogho, comments like this are what make it all worth it. Glad Networking makes sense to you now and thank you for all the kind words. 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_ .

[@elenakirilova2361]

най-накрая разбрах за какво става на въпрос !❤ THANK YOU!

[@musicmix9259]

You explanation is VERY clear and the provided material is WELL edited.

[@---usr]

Very underrated channel, please keep going. I would say this is the most clear explanation of the OSI model.

[@binoydeka810]

Thank you so much for such a simplified explanation. I am not a network guy, but need to use it from time to time and have been going though tons of articiles and tutorials. No one explained it in such a wonderful way. People always take some funny example to attract, but you have explained it a very practical way. Thank You for that!

[@husamettinglocs]

you have a knack for explaining the material clearly. thanks a lot. already subscribed to your channel. thank you very much !

[@mehtubbhai9709]

Your coverage of this topic is the BEST that I've ever seen. Thx for the great work!

[@nouhatamba9976]

incredibly explicit explanation thanks from the bottom of the heart, from senegal

[@mihretbizuayehu5167]

This is the best explanation of OSI model. Really really it's amazing!! also it is better if you cover the last 3 layers in another video ... please

[@PracticalNetworking]

Noted about L5/6/7. Thanks for the kind words !

[@AntuNeelesh]

As mentioned in my comments on your other videos, I am enamored by the ease through which you present the topics in your tutorials. KUDOS !! 😊

[@PracticalNetworking]

Hi Shekhar, it's made me smile seeing all your comments on the videos in this series. Glad you are enjoying them and they are helping clarify Networking for you! And thank you for helping w/ the YT algorithm ;). Hope you enjoy the rest of the videos in the series as well !

[@elrey9648]

Very nice explanation! Absolutely anyone on the internet who are currently learning networking will love this!

[@ilhomsaidov9523]

Thanks! Exceptionally useful tutorials. You deserve the name "Practical"😉

[@PracticalNetworking]

Thank you =). Glad you enjoyed them!

[@learningchannel274]

Thank you so much. I'm commenting on, liking and sharing every single one of your videos to appreciate your hard work! Thank you

[@kolitiengjacob275]

very educative. keep up the good work sir. your teaching style is just amazing. God bless you. Thank you

[@CristiVladZ]

the best networking playlist out there.

[@tanuj05]

You are a natural teacher , awesome

[@PracticalNetworking]

Thanks a lot 😊

[@americaneagle7777]

FINALLY -> I get the OSI model! :) Thank you so much for putting this together!

[@PracticalNetworking]

You're welcome, glad this made it finally click =)

[@dustinhxc]

This has finally made me fully understand the OSI model! Thank you!!! ❤

[@chetanyeddula3225]

You sir are a hero. Thank you for putting this content out for free for our benefit. You have my deepest gratitude.

[@ferozasarwarlodhi5961]

Its truly awesome, how easily you demonstrated to us... that now anybody can understand the myth behind it. Please do also upload explanations on layers 5,6, and 7. would be grateful to you. 😃😄😀

[@PracticalNetworking]

Noted about L5/6/7. Glad you enjoyed this series =)

[@soahibasif659]

Thank you for this masterpiece. Clear and well managed.

[@PracticalNetworking]

[@GrgRocky2011]

After many years, clearly understood OSI model. Looking forward to learn more from this channel

[@afellowpoorstudent]

Finally, the proper explanation of the OSI model!

[@enigmaamgine6827]

After watching this video, My interest in networking has developed, very concise, clear and simplest explanation ever encountered in youtube. Thank you for the free stuff

[@HNVIDEOS]

You are a great educator , god bless you !!!

[@PracticalNetworking]

Cheers, HN. Thank you for the kind words.

[@MrSchattka]

You have just earned another subscriber. The explanations you provide are very clear and easily followed - I have learned from each of several of your YT videos I have watched. Thank you!

[@zachster2016]

Almost every time i have a complicated question on your videos, youve directly answered that question in the next minute of the video. This guy is reeeeeeeally good lol 👍

[@PracticalNetworking]

Glad to help!

[@vibhorjain3667]

Your videos are amazing and super clear. They really help understand the basic concepts in a very easy to understand way. Thanks for making these videos.

[@lolygagger5991]

I know it has been 2 years but you are an amazing teacher. 10/10.

[@ping4110]

One of the best explanation that I have seen

[@PracticalNetworking]

Thank you, Ping. =)

[@ondrej7137]

Hey, i just wanted to say that my university course finals are in few days and you series is a absolute life-saver. Thank you so much for your work, it really made a positive impact on this world and you should be very, very proud! Thank you once again and have a great day.

[@teleengineer]

I have never seen such a great explanation throughout the course... simply outstanding...

[@PracticalNetworking]

Thank you for the kind words. Ahsan =)