Man, for real, keep up the amazing work. I have been like spending nearly one hour of time trying to find a video or website that explains the topic from an easier perspective since I don't have any computer science background and at the same time, most importantly, link all the layers UP!!!!! they just explain them individually and that's all. But I want a CONNECTION between all the layers. And you fucking did it (apologies for the swearing but it's just a product of relief and gratefulness). Love you. YOU ARE THE BEST. Thanks to you, finally i see a connection through all of it. Thousands of thanks. YOU ARE A BEAST
Thank you so much Jordi! Indeed I'm working on additional videos, so please share them with other people and stay tuned for more. If there are specific topics you'd like me to cover please let me know 🙏🏻
Amazing Content!! Question: You stated in your "Basic Terms" video that hosts can be anything from a single computer/device or even a specific network interface inside a computer. In that case, how does the "One Hop" concept make sense in the Data Link layer? What do you mean when you say data gets transmitted between two "directly linked hosts" if a host can be any number of things, specifically groups of much smaller things? Again, thank you for your content. It is honestly the best series on this topic that I have found!
Thank you very much for your kind words @ReemTahir! In the case you described - it is still one hop between two interfaces, as there is no additional hop between them. "Directly linked hosts" is something that is better defined when we understand the third layer as well. We can say two hosts are "directly connected" if they are not "aware" of another "hop" between them. In this case, if we consider A and B, then A is "directly linked" to B if A uses B's destination address in the Data Link layer in order to send a message to B. So we can see that hubs or switches don't count as additional hops. If A needs to specify the MAC (Data Link Layer) address of another device to get to B (and perhaps use the Third Layer address of B) - then they are not directly connected. I hope I was able to clarify things 🙏🏻
Which layer is exactly transferring the data? First or second? Because second is also transferring the data between 2 directly linked nodes and first is only transferring data. So is it like the second layer defines the direct link and data is transferred by physical layer?
Thank you for your question. The quick answer is: the first layer. The (a bit) longer answer: The first layer is the only layer to actually transmit bits over the wire (or air 😎`). The second layer is reponsible for transmitting full chunks of data - so it handles the possibility of many stations transmitting data at the same time (collisions in a shared channel), split the bits into separate datagrams (frames), handle errors in transmission and so on. So it is the layer responsible for getting the data across from A to B, where A and B are directly link. It uses the first layer to actually transmit and receive each bit, though. Please let me know if this answer helped clarify things 🙏🏻
Thank you sir, understood 🙌 And your videos are excellent. Finished the network series. I was searching for Git tree, and found your video and channel.
@@M0DALsoul The OSi model consists of 7 layers with addition of presentation AND session layer which is positioned below application layer and above transport layer.
תודה רבה על התגובה. אני אשמח להוסיף כתוביות בהמשך - בינתיים אני יוצר באנגלית כדי להגדיל את הקהל הפוטנציאלי. אני לא מכיר סרטונים שמכסים את כלל החומר הזה גם באנגלית.
Hi Murali, thanks for the question. There are different models that help us explain how networking works. Some people adopt the 7-layers mode, some - the 4-layers model (also called the TCP/IP model), and some go by the 5-layers model. I adopt the 5-layers model as I think it makes most sense in how networks currently work. I hope this makes sense.
The 7 layer OSI model is one of the most known due to its high popularity in earlier networking days but most countries (including the US) have since adopted the 5 layer TCP/IP Model as it is not as unnecessarily cumbersome as the 7 layer Model.
I love this explanation, it definitely strengthened my fundamental understanding.
Thanks a lot Ketki! It's very encouraging to get such responses!
This video definitely clarified all my doubts
Wonderful! I really hope you'll enjoy the rest of the series as well :)
I'm doing a professional course, but your videos make me truly understand it...
Thank you for your nice comment! I will create more videos about Computer Networks soon
Man, for real, keep up the amazing work. I have been like spending nearly one hour of time trying to find a video or website that explains the topic from an easier perspective since I don't have any computer science background and at the same time, most importantly, link all the layers UP!!!!! they just explain them individually and that's all. But I want a CONNECTION between all the layers. And you fucking did it (apologies for the swearing but it's just a product of relief and gratefulness). Love you. YOU ARE THE BEST. Thanks to you, finally i see a connection through all of it. Thousands of thanks. YOU ARE A BEAST
Thank you so much Jordi!
Indeed I'm working on additional videos, so please share them with other people and stay tuned for more. If there are specific topics you'd like me to cover please let me know 🙏🏻
Finally I find a video that help understand this thing
Thanks for letting me know, I am glad it helped 🙏🏻
This is an excellent video. It gave a better understanding of what each layer does; I was really confused. Thanks!
Thank you Carlos! I'm glad you found the video helpful!
Best explanations ever. I never subscribe to any channels, but I did to this one.
Wow Pedro, thanks a lot! What a wonderful compliment, and I'm glad to have you as a subscriber 🙏🏻
wow, it was a very clear description that explains the 5 layers model. I could easily understand it. thanks!
Thanks for the kind feedback!
Thank you for taking the time to make this video. It’s very clear and helpful!
Glad it was helpful! Thank you for your kind comment!
This helped me understand the 5 layer network model, thank you 🙏
Thank yhou Jimmy! I will post more videos on this topic soon enough :)
this was soooo useful, you explained so well and easy, thanks a lot
You're very welcome! Thank you for your nice comment!
Thank you so much for this video! Very helpful
Edit: 7:52 ouch poor birdy 🥺
Thank you Jay!
Amazing Content!!
Question: You stated in your "Basic Terms" video that hosts can be anything from a single computer/device or even a specific network interface inside a computer. In that case, how does the "One Hop" concept make sense in the Data Link layer? What do you mean when you say data gets transmitted between two "directly linked hosts" if a host can be any number of things, specifically groups of much smaller things?
Again, thank you for your content. It is honestly the best series on this topic that I have found!
Thank you very much for your kind words @ReemTahir!
In the case you described - it is still one hop between two interfaces, as there is no additional hop between them.
"Directly linked hosts" is something that is better defined when we understand the third layer as well. We can say two hosts are "directly connected" if they are not "aware" of another "hop" between them. In this case, if we consider A and B, then A is "directly linked" to B if A uses B's destination address in the Data Link layer in order to send a message to B. So we can see that hubs or switches don't count as additional hops.
If A needs to specify the MAC (Data Link Layer) address of another device to get to B (and perhaps use the Third Layer address of B) - then they are not directly connected.
I hope I was able to clarify things 🙏🏻
@@BriefVid Yes this explanation was very helpful! Thank you again.
you really dumbed it down for me, thank you! i was having issues with this.
Thanks a lot for your comment, and I'm glad the video helped!
Which layer is exactly transferring the data? First or second? Because second is also transferring the data between 2 directly linked nodes and first is only transferring data. So is it like the second layer defines the direct link and data is transferred by physical layer?
Thank you for your question.
The quick answer is: the first layer.
The (a bit) longer answer:
The first layer is the only layer to actually transmit bits over the wire (or air 😎`).
The second layer is reponsible for transmitting full chunks of data - so it handles the possibility of many stations transmitting data at the same time (collisions in a shared channel), split the bits into separate datagrams (frames), handle errors in transmission and so on. So it is the layer responsible for getting the data across from A to B, where A and B are directly link.
It uses the first layer to actually transmit and receive each bit, though.
Please let me know if this answer helped clarify things 🙏🏻
Thank you sir, understood 🙌
And your videos are excellent. Finished the network series. I was searching for Git tree, and found your video and channel.
Nice video, but every time I check at my local Best Buy they seem to be out of carrier pigeons.
Thanks, perhaps you should ask them to order some more ;)
Im still having problems undertanding a few key points
Please tell me what these are and I'll do my best to help :)
why would coursera teach the 5 layer model if the standard is obviously 7 layers?
Hi, well the standard depends on who you are asking. Universities usually describe seven layers while practitioners tend to go with five
the lesson I'm taking on coursera also covers the OSI model.
@@M0DALsoul The OSi model consists of 7 layers with addition of presentation AND session layer which is positioned below application layer and above transport layer.
חבל שעברת לאנגלית, בעברית היו לך אלפי צפיות כי יש מחסור בסרטונים בסגנון זה. אולי תוסיף כתוביות? הסרטונים מהממים...
תודה רבה על התגובה.
אני אשמח להוסיף כתוביות בהמשך - בינתיים אני יוצר באנגלית כדי להגדיל את הקהל הפוטנציאלי. אני לא מכיר סרטונים שמכסים את כלל החומר הזה גם באנגלית.
there are 7 layers . why you told there are 5 layers can u explain ??
pls reply
Hi Murali, thanks for the question.
There are different models that help us explain how networking works. Some people adopt the 7-layers mode, some - the 4-layers model (also called the TCP/IP model), and some go by the 5-layers model. I adopt the 5-layers model as I think it makes most sense in how networks currently work. I hope this makes sense.
The 7 layer OSI model is one of the most known due to its high popularity in earlier networking days but most countries (including the US) have since adopted the 5 layer TCP/IP Model as it is not as unnecessarily cumbersome as the 7 layer Model.