TCP - 12 simple ideas to explain the Transmission Control Protocol
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- čas přidán 7. 06. 2024
- TCP has been the predominate layer 4 protocol that has served the Internet for the last 40 years. In this video we take a deep dive into TCP and illustrate how all of these concepts work together: Sequence Numbers, Acknowledgement Numbers, Window Size, Delayed Acknowledgements, Flow Control, TCP Connection Closures, and FIN + Reset Segments.
I've broken up TCP into 12 simple distinct ideas, and if you can understand each of those 12 ideas, then you can say you can understand TCP better than most. Hope you enjoy this TCP deep dive!
00:00 - Intro
00:30 - Pre-Requisites - background knowledge of TCP and UDP
00:48 - Twelve Ideas to understand TCP and the TCP Header
01:32 - Idea 1 - Sequence Numbers and Acknowledgement Numbers
03:00 - Idea 2 - Sequence & Acknowledgement Numbers are tracking BYTES sent and received
04:23 - Understanding Sequence Numbers and Acknowledgement Numbers
06:49 - Idea 3 - TCP Retransmission Timer
09:48 - Idea 4 - Delayed Acknowledgements - Acknowledgments are Cumulative
12:15 - Idea 5 - Window Size and Bytes in Flight
15:00 - Delayed ACKs vs Window Size
15:26 - Idea 6 - Window Size, TCP Headers and Flow Control
18:25 - Idea 7 - TCP is Bidirectional - both peers have SEQ# and ACK#
21:50 - Empty Acknowledgements, Duplicate Acks, TCP analysis, TCP troubleshooting
23:47 - Idea 8 - Initial Sequence Numbers (ISNs) are Random
24:50 - Idea 9 - TCP Three Way Handshake - SYN, SYN ACK, ACK
26:40 - 3-way Handshake, SYN flags, ACK Flags, and the TCP Header
28:40 - Initial Window Size is set in the three-way handshake
29:19 - SYN packets increase the Sequence Number -- The Phantom Byte
30:44 - ACK flag is turned on for all TCP segments, except the initial SYN
31:22 - Idea 10 - Two methods for TCP to close a connection - FIN and RST
32:20 - Idea 11 - FIN Flags and Four Way Connection Closure
34:40 - FIN Flags do not need to be sequential
38:05 - Phantom Byte inside the FIN and SYN Segments
39:38 - Idea 12 - RST Flags instantly terminate a TCP connection
42:00 - Want more? Help me blow up these videos and I'll create the full TCP Masterclass
42:47 - Networking - The Internet, the Cloud, and everything in between
TCP vs UDP - Explaining Facts and Debunking Myths - TCP Masterclass - Lesson 1
• TCP vs UDP - Explainin...
=== 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?
====
🖧 Full Networking Fundamentals series (Module 1 - all FREE):
• Networking Fundamentals
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If you enjoyed this content, then please tell one other person about this series. Sharing this video is the best way you can thank me and return the favor for this free content. Plus, you can get free Internet Points (karma, likes, retweets, etc) by simply sharing this content across social media communities. =) Thank you.
--- - Věda a technologie
📺🧩 TCP Masterclass: czcams.com/play/PLIFyRwBY_4bS-PQZoF0UySdG0sH9VA0bn.html
🚨📢 Announcement: *I'm creating a full Networking course!* Details --> pracnet.net/networking
👉👉 Enroll now for *discounted early access* to the course and a chance to help shape its content.
📺🕸 Module 1 of the course is *free* : czcams.com/play/PLIFyRwBY_4bRLmKfP1KnZA6rZbRHtxmXi.html
But what about the TCP Masterclass?
I have about 10-12 lessons scoped out for a comprehensive TCP Masterclass, and I'd love to create it at some point.
When I released the first three lessons, I offered a challenge: If any one video garnered 100k views in the first 6 months, I would create the full TCP Masterclass. Unfortunately, we didn't meet that goal, so I had to prioritize other projects.
But I haven't given up hope! *If you are interested in seeing the full TCP Masterclass developed, then the best way to bring that to fruition is to spread the word about this content*.
Doing so will help others fully understand TCP and UDP and bring me closer to committing to creating the full series... Plus, think of all the Internet Points you can get for sharing this series (likes, karma, follows, etc) 😉
If you share this series, please use this link: czcams.com/play/PLIFyRwBY_4bS-PQZoF0UySdG0sH9VA0bn.html
Otherwise, I genuinely hope you got a lot out of the first three lessons. Thank you for all the encouraging words in the comments. =)
Hi Ed, I am already a subscriber of tls/ssl course . Could you please tell me more about the newly launched networking course like you will OSPF,BGP in detail ? Just a small request on any update ipsec vpn as i am waiting for almost 5-6 years when i started following you😀 Any idea about length of course in hours ?
Please share content of the course.
Purchased this course.✌
Hi. When do you expect to release the completed course?
@@amitpatil1900 Details on the full course are in these two links:
- classes.pracnet.net/courses/networking
- www.practicalnetworking.net/index/networking-fundamentals-how-data-moves-through-the-internet/
More details will be added shortly
Ed, I just wanted to take a moment to express my gratitude for the outstanding educational content that you provide on your CZcams channel. The educational network courses that you have created is one of the best on the platform, offering a wealth of information on a wide range of topics. Your courses are well-structured and easy to follow, making it accessible to learners of all levels. The level of detail and expertise you bring to each of your lessons is truly exceptional, and your passion for teaching shines through in every video.
@@PracticalNetworking Absolute chad
totally agree!
@james1081 ditto. @practicalnetworking Thank you for the awesome content
The idea behind dividing the concepts into several ideas and explaining it one by one in detail it's just awesome.Loved the way you taught TCP.🙇♂️
Your entire video series has been amazing. You are very talented in explaining things fluidly and simply.
The best tcp video I've watched so far - vivid and systematic. Looking forward to the masterclass. 👍
Your videos have been so incredibly helpful to actually understand these concepts, thank you for explaining things so clearly!
Just finished this series and I must say I'm thoroughly impressed. You are God sent Ed. Thanks for making this free and accessible for all.
The most comprehensive explanation of TCP I have ever watched. I am looking forwarding for the full TCP master class.
I would rate you top 1 teacher on youtube. Not only networking teacher, but like your networking teaching is the best teaching compared to teachers in any field.
I had gone through about 4 videos which left me a bit confused, but found your video had excellent clarity. Each point was explained without ambiguity and really helped me to get it. Thanks a lot!
I swear this is the Most Detailed Video for TCP Connection inner-working... Thanks for the so much detailed Explanation ❤️
I don't normally comment on CZcams videos but I just had to say that this is one of my favourite explanation videos ever. The video was super clear, easy to follow and the diagrams were icing on the cake. Thanks a lot mate!
Thank you, this is truly one of the best courses I have listened to. Clear, precise, instructive. THANKS
Cheers, Krazydji! Glad you enjoyed it =)
I was looking for clear step by step explanation of how tcp works, glad that I found your channel :)
=)
Excellent video, after going through a ton of videos about TCP on youtube, by far this is the best and simple video that explains the complex TCP concepts very well. Awesome job. Really like your videos.
It is the combination of identifying key concepts in an order, visual representation and concise explanation that makes this video standout.
I've never seen someone that is able to compress lectures long of material into 44 mins of video white taking the animations into consideration.. Keep up with the content !
Thank you for the kind words, and thank you for directly supporting the channel. Glad you enjoyed this video =)
Wow, this video is a gem! Your presentation on TCP connections is top-notch. The clarity in explaining the complex concept of TCP really stands out. I appreciate how you break down the topic in such an understandable way. It's evident that a lot of effort went into making this, and it's greatly appreciated! Kudos to you!
Thanks for the kind words and recognizing the effort it took to put this together =)
This is gold content. Straight to the point. Thank you Ed.
Some people are just called and born to do certain things. Yours is certainly teaching mate! I watch these videos as a refresher on certain concepts, but I must say you blow it out of the park! More power to you! Keep them coming pls!
Your pedagogy is simply awesome. Great work. Kudos
Before coming to this channel, i used to think i was the only one weak at networking and i had no possibility to learn it. But now i think it is possible to be boss at networking thanks to you.🥰
Please continue the series . words cant explain how useful your content is .excellent animated content even normal people can understand the topic easily .
Fantastic work here as always Ed. Its really a shame that millions of tubers aren't into networking. For those who are lets help share these amazing vids. Looking forward to the course!
If only ;) Thanks either way for the kind words & support.
What a lesson. Such a simple explanation. Kudos!
I think it's only fitting that I start off by saying, BRILLIANT!!!! Complicated brought down to Simple. I've always been curious as to how these numbers appear in Wireshark. Hopefully we have a lot more CZcamsrs paying attention to this video. You have set the bar extremely high. Thank you and I look forward to more great content!!!!
Dude Great video! I finally have a clear understanding of TCP/ip thanks to your explanations. Keep up the good work!
Absolutely perfect channel! So glad I discovered it. Amazing job!
Thank you so much, Sir! What a Phenomenal 'teaching' skill you possess, Ed. Mind blowing and this 44 minutes session barely felt like it. BTW, I am 'not' a technical engineer - technical program manager and you made me understand this 12 methods to understand TCP supremely well ever in my 26 years of work experience :)). Salute and a lot of respect to you. Excellent stuff!!
Love the explanation with visual schematics. Thank you for your awesome work!
You're welcome! =)
I've seen video breakdowns of TCP before, but this is perhaps the best I've encountered. Great job!
Again, you hit it out of the ballpark. Fantastic.
This is the best video on TCP I have ever watched.
Thanks for breaking down TCP to easily understand.
Seeing what I am able to understand, proves you can teach an old dog new tricks. Thank you for making this topic user friendly.
Just a word of appreciation I've networking exam today and your videos have gave a in-depth practical understanding that's very rarely found in others! :)
Fantastic, hope the exam went well!
Your channel is gold in network concepts thankyou!
Great content & great instructor explaining the concepts with an excellent method ! Thank you so much Ed ! keep it up !
Wow this is one of the best lectures in computing ever!!
best video about tcp ive ever seen in my life
Your Channel is awesome! So much Information transmitted with professionalism! Very helpful to understand these things with your explanation. Keep up with your great content. Thank you!
The easiest Explanation possible. Hats off
Another great job, sir.
This is one of the best explanations of TCP protocol.
Thanks a lot for taking the time to create such fantastic content.
Hats off Ed. Truly your a great teacher.
Thank you, Swapnil!
please finish these awesome series i just can't understand it from nobody else but you , you simplified it and made it more enjoyable , thanks for your efforts and we are waiting for more 🤩😍😍😍😍
As always great detailed explanation, Thank you Ed!!
You're welcome, Amit. Glda you enjoyed it =)
Excellent work, as usual, Ed! I'm delighted to have bought the course early on.
Show me a tutor that breaks down concepts better…. More grease to your elbows 👏🏾👏🏾👏🏾👏🏾👑
Totally agree 💯👍
Thank you for the kind words =)
Agree
Great content! Thank you so much for devoting your time to this free video.
Thank you very much for this video. It helped me a lot. You're a great teacher and I'm glad I found your channel.
Understood the concept of TCP very well. All credits to you🤝
Joined this course today... Very Excited to channel my efforts in right direction.. Ed.. you are the modern GURU..
Thank you, Surendra! Welcome to the course !
This channel deserves better. Wonderful explanation. Learnt this clearly after 4 yrs in networking field
Glad this helped =). Most of my content is based around "How did I wish someone explained it to me when I was first learning"
I have no words to appreciate you...simply out of the world ❤
Sir, you are a true genius! I have learned so much from these videos!
Man, you are awesome! Explanation on a high level! Thank you
I just watched 5 mins of your video, this most complicated concept is start making sense. Thank you so much this video.
Glad you're enjoying this video =) I worked soo hard on the TCP lesson.
Hi Ed, it was very good session. As always you have cleared myth of TCP framework. Eagerly waiting for the second session. Plz upload as soon as possible.. Once again big thanks for your excellent video... eagerly waiting for your second series
Best networking explanations ever. I am becoming addicted to this channel.
Excellent, Emilio. Of all the addictions you could have, I imagine this is the least unhealthy ;) Glad you're getting a lot out of this content.
This was a great explanation ❤️
Great content! Presentation easy to follow. Many thanks indeed
Thank you so much for a such a detailed explanation of TCP🙏🏻
Great video! Looking forward to more content.
The best is Ed. He does a remarkable job of simplifying complex technologies for us by breaking them down into manageable chunks.
What a great teaching! Thanks!
perfect , TCP Master class , thank you sir.
I rarely comment on videos, but this was fantastic! Well done.
Thank you FInn. I appreciate you taking the time to leave a comment and that you enjoyed this video. Cheers!
PHENOMENAL JOB SIR! THANK YOU. So easy to follow and understand. clear and confident information.
You are very welcome
Great content !!! Very helpful
Waiting for full series Thanks
Ed thanks for the great break down. This definitely helped improve my understand of how TCP works.
Hi WemDizzle, glad you enjoyed this one too. Cheers!
TCP is one of those topics that is super easy to learn but hard to master because of its depth. You can fix TCP-level errors if you learn TCP fundamentally. I've been learning Wireshark recently, and TCP topics are confusing. This video helped me understand some confusing topics. thank you!!
Hi Jayson, absolutely! Learning the fundamentals well is critical. Glad you enjoyed this video! Cheers.
Thanks ed, waiting for your full TCP and UDP series ...
You are doing an amazing job. God bless you.
Excellent ..Never seen complex topic explained simple way....
Glad you enjoyed it =)
Thanks!!! this is the Best TCP explanation...
You are working hard sir. Keep going watching from INDIA
THank you, Yaseen!
one simply does not simply provide the best TCP video on the internet, but this man does.
funnily, i was genuinely sad when BOB closed the connection on ALICE 😆
It's OK! They can initiate a new connection at any time ;p
(jokes aside, thanks for the kind words, glad you enjoyed the video!)
Thank you so much for making me love networking !!!!
Another brilliant video about TCP connection!
Thank you for supporting the channel =)
hats off to your CN course dude . Very Nice 😊. Keep it up. GBU. ❤
Very well explained
Thanks alot....perfect explanation sir
I don't even know how to express, that your method of explaining is out of this world. I understood each word you said and obviously the topic. I am looking for videos on routing protocols and vpn protocols. I can buy them if they are available.
Jolly helpful.
Thanks.
Subscribed.
Thank you for your support =)
Well explained 💯
you are amazing bro, thank you, best explanation I have found and very good animation
Great explaination
Really indepth explanation, thanks a lot
awsome explanation 🤩 !
Thank you, really good explanation!
Thank you for the thorough explanation
You're very welcome, thank you for supporting the channel.
you're good at this Sir. Hat off to you !
Your videos are really amazing
Gold Standard video by Ed
Hello sir. Love from India..great teaching skills❤
Another great video. Thank you.
Thank you kindly =)
The practical and efficient way to understand the TCP
Here I am watching your video at midnight even though i am down with fever and cough. The medicine with high doses should sedate me but i am getting energized seeing your video
Top-notch teaching
You are the best tutor in networking.
how do you make it so easy to understaaaaaaaaand? THANKS A LOT. Super clear and simple to understand. Best networking professor around.
Thanks for the kind words =)