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

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.
Before watching this video, watch the first videos in the series:
Lesson 1a - Network Devices: Hosts, IP Addresses, Networks:
• Network Devices - Host...
Lesson 1b - Network Devices: Repeaters, Hubs, Switches, Routers
• Hub, Bridge, Switch, R...
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?
---
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---
🖧 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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#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/

[@sgcatr]

We do inevitably 🤓🤓🤓

[@elvismimbayuniseh3978]

Definitely

[@PracticalNetworking]

@@elvismimbayuniseh3978 Thank you =)

[@PracticalNetworking]

@@sgcatr Thank you =)

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[@hege750]

You, sir, are a networking hero. This requires some serious skills to be able to explain things this clearly as you do. Keep the great videos coming, thanks!

[@PracticalNetworking]

Glad you are enjoying them =)

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Every one should watch jeremys it lab along with this channel

[@smashingtennis]

Agree!

[@divixonfire]

no way i surfed the whole internet trying to find an explanation to the osi model until i found this thing you re litteraly a pro thx a lot ❤️

[@howaboutsomesoyfood]

I love that you explain this without overcomplicating it with too much technical jargon. I'm studying for a networking exam and this series is really helping.

[@PracticalNetworking]

How did the exam go =)

[@AntuNeelesh]

Just like any popular web series, I have been binge watching your videos since yesterday. Thanks to KZbin algorithm that I landed on your channel and immediately subscribed. The way you present the hitherto complex topics in such a lucid and comprehensible manner is mind boggling !! I mean in last 24 hours itself, just by binge watching your videos, my knowledge on networking fundamentals and the OSI model has shot up by multiple notches. It's incredible !! Not a single tutor in my career's last 10 years had explained the concepts in such an eloquent manner (that too free). Please accept my GRAND SALUTE and continue to do the awesome work !! 😇

[@PracticalNetworking]

[@kaiser9199]

best example of why layer 3 ip addresses and layer 2 mac addresses exist that i've seen i finally understand the concept, thank you

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Explained this so well. Best so far!

[@lemonpocket1]

It's the first time I have clearly understood the OSI model. Excellent explanations and illustrations. Looking forward to the complete networking course!

[@AmitKumar-gt6vc]

I remember reading a quote that said "The true mark of an intelligent person is how they explain stuff." and hearing the different systems of our body analogy did that for me. It explained the physicality of networking layers so nicely for me. You are doing great work, sir!

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Finally, A thirsty reaches the well..... Thank you for all this :)

[@PracticalNetworking]

You're welcome, Scorpio =)

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I am preparing for the CCNA. I can finally move forward with understanding. This is the best explanation of the TCP/IP, OSI Model I've come across. Some things now finally make sense. I excited about the rest of your videos. I feel confident now about the course.

[@PracticalNetworking]

Thank you, Alecia. Glad you enjoyed this series =)

[@dmitrikonnov922]

Hi, did you pass the exam?

[@ethemermis5790]

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[@PracticalNetworking]

Thank you, Ethem. I appreciate the kind comment.

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[@PracticalNetworking]

Glad these videos have helped you =). Cheers !

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[@PracticalNetworking]

Jeremy is great! I recommend his course to all my followers as well: www.practicalnetworking.net/announcement/ccna-training-videos-from-jeremys-it-lab/

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[@PracticalNetworking]

Thank you =). Glad you enjoy them!

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Einstein said ‘if you can’t simply explain it , than you don’t fully understand it’ … you are the epitome of this! ..

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Meaning your a master at this, your understanding is so potent your so good that you simply explained things lol

[@PracticalNetworking]

That in fact is the quote I use as my mission statement on my About page of my blog =). pracnet.net/about Cheers friend, thanks for the encouragement. =)

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Possibly the best teacher i've ever seen on any topic. You explain things really, really well. Amazing stuff.

[@PracticalNetworking]

[@Neo_X1]

This is one of the coolest, simplest and logical explanation of how OSI works. There are tones and tones of videos on YT but unfortunately majority stuff is just "theory and conceptual" level. This video on the other hand explains everything practically and the way it should be. Great work.

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I have been watching several videos to understand this concept and I must confess yours has nailed it. I can't wait to watch the part two of the OSI model

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Thankyou, your illustration of the difference between the function of IP address and Mac address is amazing

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Thank you so much! I’ve been bumping my head where MAC addresses and IP addresses interact and what layer 2 switches do with both. This cleared it up for me. Great video! I will keep watching as this helps me with my job ❤

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These are the best videos that explain networking I've seen. Thank you for this, keep it up.

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[@greob]

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[@PracticalNetworking]

You're welcome!

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love it! so clearly explained!

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This is the BEST explanation of the OSI model I have ever seen. So many people don't explain why it is practical to use it as a model for networking, so it's just rote memorization of weird facts that don't' have any context. Especially when you get to the upper layers. You're a very good teacher and actually made this comprehensible, and INTERESTING, and not just a bunch of facts.

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Best OSI model description!

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Best explanation till now.

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This series is jaw dropping in its simplicity, insight and usefulness. Many, MANY, thanks.

[@PracticalNetworking]

You're very welcome, Mr Didaxi =)

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Congratulations on your videos. You do a wonderful job explaining everything in a clear and very well organized manner. Well done! Looking forward to seeing more :)

[@PracticalNetworking]

Thanks Antonio. I appreciate the kind words =)

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Amazing explanation thank you!

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No words to explain how simply you have explained this. Appreciating your passion and efforts.

[@PracticalNetworking]

Glad you've enjoyed these, Sebastian =). Hope you enjoy the rest of the series as well. kzbin.info/aero/PLIFyRwBY_4bRLmKfP1KnZA6rZbRHtxmXi

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Truly appreciate simple detailed explanations.

[@PracticalNetworking]

You're very welcome, Elene =)

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Thank you again for your hard work !

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[@PracticalNetworking]

You're welcome, Burim. =) Glad you like them!

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[@PracticalNetworking]

Thank you, Ferhana. Kind of you to say. 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_ .

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I'm taking an ethical Hacking course and I needed these videos!!

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Finally a video that explains what devices sit where in the model. Also I have watched so many videos on this and never once have they explained the MAC address data transport part showing how the mac address is changed per hop so that helped explain a lot as well, thank you for this video.

[@PracticalNetworking]

You're very welcome, Zekoo. Glad you enjoyed it.

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Thank you sir, I was struggling with ip , now I'm taking a course about networking thanks to you, you're great teacher

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Bro is a legend. Thank you.

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thank you for your excellent explanation sir

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when i thought i know the OSI model and you just blow me away with really better understanding . Now i do not have to memorized this again with bogus acronyms . I can now explain to this anyone. Thank you Ed

[@PracticalNetworking]

Explaining it to someone else is always my goal since I started my website 5+ years ago =). Glad to hear this video has empowered you to teach someone else =)

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You explain things so well that a little child would understand too and remember it. Thank you

[@user-qk4qo1fi2b]

Crystal clear. Awesome. Thanks

[@PracticalNetworking]

You're welcome, e7 =).

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THE BEST explanation so far. Thank you.

[@PracticalNetworking]

You're very welcome =)

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This is the best explanation of the OSI model on the Internet. I'd recommend all of you to watch all the videos of this channel at 0.75x speed to get an even-better understanding of the topics.

[@PracticalNetworking]

[@MayankLongiany]

@@PracticalNetworking You're welcome. All the best, fellow teacher.

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Very well explained.

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This is the best explanation of headers. I’ve know fully understand what I’ve been struggling with for the past year about MAC and IP addresses

[@PracticalNetworking]

Fantastic to hear that it makes more sense now. Thank you for supporting the channel.

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this is very informal I work on networking all day switches Palo Alto and F5 but I don't have the CCNA but I now getting thanks for the help

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You are God sent!