OSI Reference Model - Best Explanation
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- Опубліковано 12 вер 2024
- The Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to their underlying internal structure and technology. Its goal is the interoperability of diverse communication systems with standard protocols. The model partitions a communication system into abstraction layers. The original version of the model defined seven layers.
I want this dude to teach me everything he knows about network engineering.
Yeah - me too
So easy to understand !
Awesome
Seriously. This is the first person to put in all in proper context. Brilliant.
I want him to teach me how to live life, too!
Dude... This guy has taught me more in a night than my Cisco networking I teacher has taught me in 2 months. Thank you so much!
These kind of professors make you fall in love with the subject !
Dont we have more videos from him ?? He is one of the best guy I have seen here ,explaining everything in simple language ... Awesome ..
it is sad, no other vidoes! I wanted to learn more
@@VijitChandna "Nicholas Andre" this is his channel
@@malekagribi6284 yo thank you so much
@@VijitChandna happy to help
❤❤❤❤@@malekagribi6284
Some people are just born to be teachers !! You can see the passion with what he teaches, makes learning FUN, EASY, INTERESTING and biggest of all something you would remember for a long time
i was complaining to my teacher in class about how abstract networking introduction is and i was having a hard time wrapping my head around the concepts. This guy is, perfect. He makes the abstract concrete. I wish I could give more than a like to this video.
00:50 WHY develop the OSI model?
05:02 The Application Layer
07:36 The Presentation Layer (Layer 6)
09:17 The SESSION Layer (Layer 5)
10:50 The Transport Layer (Layer 4)
11:00 TRANSPORT is not moving something from A to B.
11:20 It's responsibility is to get the SEGMENT to the right APPLICATION or SERVICE.
When I say APPLICATION you need to think "client".
When I say SERVICE, you need to think SERVER.
12:20 What port is the SERVER going to be listening on? PORT 80
Port 80 is the default port for web delivery.
13:25 It's not about picking up from A to B; it's about working out which service on the server needs the message (once the message has arrived on the server).
How does the server know to look for port 80?
Answer: the HEADER
16:10 Introducing RELIABLE DELIVERY
17:27 We gain EFFICIENCY
19:25 Does all communication need to be reliable?
21:58 FLOW CONTROL
22:24 Slap a header on there
In that header there are going to be "sequence numbers". We call them fields.
23:20 There's going to be a SOURCE port and a DESTINATION port.
25:47 What if I just throw it out there?
If you tried to verify every --item-- communicated, it would not be effective.
26:40 "I use unreliable delivery!"
27:27 UDP and un-reliable delivery
- If you don't get what I send, raise your hand!
- If I choose to use UDP.......
28:20 "And that's what uTorrent does"
- To successfully download a file, you need all the bits
- But imagine if there was a check after each thing communicated!
- 29:00 Contrast with downloading a file on a web browser
- 29:26 Prime example of UDP delivery is VIDEO
31:30 As a DEVELOPER, you have to consider the trade-off between RELIABILITY and PERFORMANCE
31:49 Summary
32:00 NOTE on segmentation
- We may have multiple applications running concurrently.
- We'll probably have multiple computers on our network using our connection, concurrently.
- Segmentation isn't merely achieved by dispersing messages across several connections;
- It's also achieved by allowing multiple people to use each connection.
33:03 We multi-plex the conversation: we take segments from different conversations and interweave them together, so it looks like everyone's using the same network connection at the
same time.
33:27 The Network Layer (Layer 3)
34:24 By the time we get down to Layer 3, we have DEVICES
35:15 What is a packet?
36:00 Addressing mechanism
36:20 "The protocol used at Layer 3 is typically IPv4" - It could also be AppleTalk though.
39:53 The Data Link Layer (Layer 2)
41:10 The PHYSICAL Layer (Layer 1)
41:37 What is a frame?
42:15 The Logical layer and the MAC layer
thank you
Sir Kindly upload all the knowledge you have.
One of the best lecture ever heard.
This man is so under rated...he is one of the reasons I passed my test easily...thank you Soo much...I wish there more videos
can I find more videos for him?
@@haneenqamar8245search Nicholas andre
We need more professor like him!
I wish i met this guy exactly 10 years ago. This guy taught me more than Behrouz A. Forouzan and Tanenbaum.
Best explanation so far....... But the camera movement was bit annoying :)
Man - you are so awesome, I could listen you and learn every day and I think about everything what is related to Network, Computers !
Why only 2 videos .... I want more !
Great Job. Grats
He is simply the best...and one of my inspirations to be a professional. Congratulations and Thank you for your service
I think it's funny that the "camera person" had to take a leak mid-lectuere. Knuckleheads in that class. Prof. Is legit. Thanks for the share :)
You are by far THE best at teaching this material..where are you?? make more! Thank you for what you've done!
Holy Crap..This is the best and most simplified explanation of the OSI Model I have seen. Have been looking for something like this for a very long time.. Sad that the camera stopped tracking along the way.. Still loved the lecture .. Would have loved being in that class..
31:05 He is the GOD of explanation.
More videos by professor is available at : ua-cam.com/users/mrnickandrevideos
Awesome explanation. Very good style of teaching. Fire the camera guy
thanks for your video for the last cople days i was in to netacad stresing my out, i got few things out of there, but this video made everything more clearer. big thanks
He makes HNE so cool!!! Plus all the other miscellaneous info on the side....I love it...❤️❤️❤️thank you!!!!
Please make more videos on each layer of OSI model. It helps me to learn much about OSI model..
he is so amazing with his teaching skills..one word WOW to this video..,Please upload your videos
search "nicholas andre"
Oh drunk engineer :'( wish I could get all your lectures on video! Thank you so much for this guide! Truly appreciate it.
This dude the man. I want him to teach networking! respect
15:00 lol this guy is the best.
youtube algorithm needs to make this guy's videos blow up. But I don't even know his name.
Is there any more lectures with this teacher?, he's brilliant!
search "nicholas andre"
@@Dchau360 how did you find his name?
@@Fernandez218lol idk man. I don't even remember watching this guy. It's been 3 years. Probably from other videos...
@@Dchau360 "lol idk man. I don't even remember watching this guy. It's been 3 years. Probably from other videos..."
lol this sounds like me. I'll watch a video and be like "oh man this is cool let me leave a like" and then find my comment and like on the same video from years ago.
@@Fernandez218 I too was looking for this teacher, then his videos popped out in the related video sections, look for Nicholas Andre he has of videos of his lectures on his channel (all network related of course)
Why this channel have only two videos??? Where can I find more videos of this guy?
Yep, that was definitely a really good explanation. Thanks for doing this video
so i just became a master of osi model with just this? what was i doing wasting months in university lol. This guy is too gooooddd
Did anyone feel bad at @21:45 for the guy who came late for the class...?
47:00, lol, it happens all the time in my bedroom and most of nature dude😂😂😂😂
The uni better be looking after this guy well. What a gun
How can we get the name of this person? I am also highly interested in buying his whole semester course on Networking. He is a master of teaching!!
Stefan Spinu search for nicholas andre and you will find him
_Drunk Engineer_ is not this lecturer's account.
Here is his actual account (and the rest of his videos) :
ua-cam.com/users/mrnickandrevideos?view=0&sort=da&flow=grid
Fantastic Video! Awesome explanation. Thank you!
Best of explanation
perfect. thank you very much for the video.
Wow! Amazing
He is awesome.
Thank You!
where can I see more of his lectures/videos ??
I want you to be my spirit animal Drunk Engineer
great video
Great Job Teaching!!!!! just slow the video down little. thank you!!!!!1
Anyone knows the name of this guy or where I can find the rest of the videos in this series?
he said "application, also called Layer 1" but then went on to explain it as "layer 7". My alarm bells started ringing
source video: ua-cam.com/video/0Rb8AkTEASw/v-deo.html
brilliant
Id love you to be my computer science teacher
best
cool bro
39:20 it’s always hard to estimate the future
The name of your page brought me here,
However, Your advice made me stay.
Where'd ya go??
Neglect the camera,i am not missing a lecture from him
i want to be his student
doesnt tthis guy look like snowden
Awesome lecture and explained very well indeed
the camera guy needs to retire
your camera man so .....grrrrrr...annoying
THANK YOU!