TCP - 12 simple ideas to explain the Transmission Control Protocol

Рет қаралды 123,748

Күн бұрын

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...
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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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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.
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Пікірлер: 320

@PracticalNetworking Жыл бұрын

📺🧩 TCP Masterclass: kzfaq.info/sun/PLIFyRwBY_4bS-PQZoF0UySdG0sH9VA0bn 🚨📢 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* : kzfaq.info/sun/PLIFyRwBY_4bRLmKfP1KnZA6rZbRHtxmXi 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: kzfaq.info/sun/PLIFyRwBY_4bS-PQZoF0UySdG0sH9VA0bn Otherwise, I genuinely hope you got a lot out of the first three lessons. Thank you for all the encouraging words in the comments. =)

@DeepakKumar-ov8ko Жыл бұрын

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 ?

@amitpatil1900 Жыл бұрын

Please share content of the course.

@DeepakKumar-ov8ko Жыл бұрын

Purchased this course.✌

@nanosni Жыл бұрын

Hi. When do you expect to release the completed course?

@PracticalNetworking Жыл бұрын

@@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

@jamess1081 Жыл бұрын

Ed, I just wanted to take a moment to express my gratitude for the outstanding educational content that you provide on your KZfaq 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 Жыл бұрын

@Skiemlordd Жыл бұрын

@@PracticalNetworking Absolute chad

@gerard9203 Жыл бұрын

totally agree!

@_Divine1 2 ай бұрын

@james1081 ditto. @practicalnetworking Thank you for the awesome content

@sididoueida5705 10 күн бұрын

the most comprehensive explanation of TCP I've ever seen. Amazing ......

@user-uo9oj6oo9t 5 ай бұрын

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.🙇‍♂️

@TheDavood7 6 күн бұрын

I have never commented on KZfaq videos throughout these years, but you made me do so with this video. This is the most comprehensive TCP video that I've ever seen. I watched your routing protocol videos, and those were awesome too. Please keep your videos "free" for those of us who live in countries where paying in dollars is so expensive that we can't afford it

@AL300bed Жыл бұрын

The most comprehensive explanation of TCP I have ever watched. I am looking forwarding for the full TCP master class.

@dragonbg6105 Жыл бұрын

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.

@PracticalNetworking Жыл бұрын

@FuzNuts Жыл бұрын

Your entire video series has been amazing. You are very talented in explaining things fluidly and simply.

@shahinuddin4418 2 күн бұрын

Finally I understood the complex concept. Thanks a lot to make the tough topic simple for me.

@cait3235 10 ай бұрын

Your videos have been so incredibly helpful to actually understand these concepts, thank you for explaining things so clearly!

@krkartick 11 ай бұрын

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.

@shellohd8421 5 ай бұрын

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 !

@PracticalNetworking 5 ай бұрын

Thank you for the kind words, and thank you for directly supporting the channel. Glad you enjoyed this video =)

@cslb38 Жыл бұрын

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!

@PracticalNetworking Жыл бұрын

If only ;) Thanks either way for the kind words & support.

@leonardoffor6515 11 ай бұрын

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.

@seradfb345 8 ай бұрын

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!

@rookyere Жыл бұрын

The best tcp video I've watched so far - vivid and systematic. Looking forward to the masterclass. 👍

@khalidjibril9066 5 ай бұрын

I don't normally comment on KZfaq 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!

@fakeaccount3415 4 ай бұрын

Please continue the series . words cant explain how useful your content is .excellent animated content even normal people can understand the topic easily .

@AnantaAkash.Podder 6 ай бұрын

I swear this is the Most Detailed Video for TCP Connection inner-working... Thanks for the so much detailed Explanation ❤️

@suave9901 3 ай бұрын

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!

@ZinouThreepwood Жыл бұрын

Great content & great instructor explaining the concepts with an excellent method ! Thank you so much Ed ! keep it up !

@mumtahinaparvin7668 Жыл бұрын

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.🥰

@jimboelterdotcomm9153 Жыл бұрын

I've seen video breakdowns of TCP before, but this is perhaps the best I've encountered. Great job!

@amirsaid Жыл бұрын

Dude Great video! I finally have a clear understanding of TCP/ip thanks to your explanations. Keep up the good work!

@tng6628 Жыл бұрын

This is gold content. Straight to the point. Thank you Ed.

@morenokratter669 Жыл бұрын

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!

@ashokreddyb7867 Жыл бұрын

Your pedagogy is simply awesome. Great work. Kudos

@cadsticcadsticc1322 Жыл бұрын

Seeing what I am able to understand, proves you can teach an old dog new tricks. Thank you for making this topic user friendly.

@Fredsch08 8 ай бұрын

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.

@ramsfo 7 ай бұрын

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!!

@eyaGHrd Жыл бұрын

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 🤩😍😍😍😍

@mohamedabdi6419 Жыл бұрын

Excellent work, as usual, Ed! I'm delighted to have bought the course early on.

@PracticalNetworking Жыл бұрын

@amlananupam1901 10 ай бұрын

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!

@PracticalNetworking 10 ай бұрын

Thanks for the kind words and recognizing the effort it took to put this together =)

@user-qh9vs8pe1e Жыл бұрын

I was looking for clear step by step explanation of how tcp works, glad that I found your channel :)

@PracticalNetworking Жыл бұрын

@karthik2705 10 ай бұрын

This channel deserves better. Wonderful explanation. Learnt this clearly after 4 yrs in networking field

@PracticalNetworking 10 ай бұрын

Glad this helped =). Most of my content is based around "How did I wish someone explained it to me when I was first learning"

@krazydji Жыл бұрын

Thank you, this is truly one of the best courses I have listened to. Clear, precise, instructive. THANKS

@PracticalNetworking Жыл бұрын

Cheers, Krazydji! Glad you enjoyed it =)

@misha2082 Жыл бұрын

What a lesson. Such a simple explanation. Kudos!

@anuragdixit87 Ай бұрын

ED when i started my career in network domain...senior people always said just read todd lammle 's book for CCNA ...each word having making sense even it is true at inital level ..but now i will say each word in this vedio make sense as well as very important. Every person who belongs to infra team must go via this video.. Very informative, much cleared in very short time .. Thank you ED for such a video 😊😊

@PracticalNetworking Ай бұрын

Thanks for the kind comment, =) I'm thrilled to hear you've enjoyed this video and compare me to "the greats" like Todd Lammle. =)

@adamstrejcovsky8257 7 ай бұрын

Absolutely perfect channel! So glad I discovered it. Amazing job!

@x0rZ15t Жыл бұрын

Love the explanation with visual schematics. Thank you for your awesome work!

@PracticalNetworking Жыл бұрын

You're welcome! =)

@nulllogos5846 Жыл бұрын

Again, you hit it out of the ballpark. Fantastic.

@dpi3 10 ай бұрын

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 😆

@PracticalNetworking 10 ай бұрын

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!)

@user-gb3gc7bq8h Жыл бұрын

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

@jaysongalicia8142 Жыл бұрын

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!!

@PracticalNetworking Жыл бұрын

Hi Jayson, absolutely! Learning the fundamentals well is critical. Glad you enjoyed this video! Cheers.

@K4pitell 4 ай бұрын

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.

@ashutoshmahapatra537 6 ай бұрын

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! :)

@PracticalNetworking 6 ай бұрын

Fantastic, hope the exam went well!

@surendras5853 Жыл бұрын

Joined this course today... Very Excited to channel my efforts in right direction.. Ed.. you are the modern GURU..

@PracticalNetworking Жыл бұрын

Thank you, Surendra! Welcome to the course !

@troysipple2591 Жыл бұрын

This is the best video on TCP I have ever watched.

@UCFc1XDsWoHaZmXom2KVxvuA 5 ай бұрын

Wow this is one of the best lectures in computing ever!!

@lemianelson2012 Жыл бұрын

Show me a tutor that breaks down concepts better…. More grease to your elbows 👏🏾👏🏾👏🏾👏🏾👑

@ManishYadav0719 Жыл бұрын

Totally agree 💯👍

@PracticalNetworking Жыл бұрын

Thank you for the kind words =)

@nocare3356 Жыл бұрын

Agree

@ErrolSimmonds-fm7bn Жыл бұрын

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 KZfaqrs paying attention to this video. You have set the bar extremely high. Thank you and I look forward to more great content!!!!

@PracticalNetworking Жыл бұрын

@eenteghadi Ай бұрын

It is so pleasurable watching your videos that can rate them as adult content😃 Thank you for sharing your knowledge

@Echiduna Жыл бұрын

Great content! Thank you so much for devoting your time to this free video.

@felipica 5 ай бұрын

best video about tcp ive ever seen in my life

@user-vg5gn3zp2m 4 ай бұрын

I just watched 5 mins of your video, this most complicated concept is start making sense. Thank you so much this video.

@PracticalNetworking 4 ай бұрын

Glad you're enjoying this video =) I worked soo hard on the TCP lesson.

@nemalisridevi7833 3 ай бұрын

Your channel is gold in network concepts thankyou!

@criminalgaming4842 10 ай бұрын

Understood the concept of TCP very well. All credits to you🤝

@TheSony7up Жыл бұрын

The best is Ed. He does a remarkable job of simplifying complex technologies for us by breaking them down into manageable chunks.

@PracticalNetworking Жыл бұрын

@finnwarner8573 Жыл бұрын

I rarely comment on videos, but this was fantastic! Well done.

@PracticalNetworking Жыл бұрын

Thank you FInn. I appreciate you taking the time to leave a comment and that you enjoyed this video. Cheers!

@yasirhamid9043 Ай бұрын

I firmly believe this is the finest educational video I have came across. Thank you very much for creating such excellent content.💯💯💯💯💯💯💯💯💯💯

@swapnilthawari7314 Жыл бұрын

Hats off Ed. Truly your a great teacher.

@PracticalNetworking Жыл бұрын

Thank you, Swapnil!

@akathul691 Жыл бұрын

I have no words to appreciate you...simply out of the world ❤

@viktorkovalets4125 3 ай бұрын

Man, you are awesome! Explanation on a high level! Thank you

@fastrobreetus 3 ай бұрын

Sir, you are a true genius! I have learned so much from these videos!

@amitpatil1900 Жыл бұрын

As always great detailed explanation, Thank you Ed!!

@PracticalNetworking Жыл бұрын

You're welcome, Amit. Glda you enjoyed it =)

@rpinto8800 6 ай бұрын

Hi Ed, thanks for the content, I have a request could you please make a paid course on BGP in depth. You are an amazing teacher, I like your teaching style.

@shujauttali2608 Жыл бұрын

The easiest Explanation possible. Hats off

@harmanmehrday Жыл бұрын

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.

@timstring0902 Жыл бұрын

Thank you so much for a such a detailed explanation of TCP🙏🏻

@constantinzaharia1800 Жыл бұрын

Great content! Presentation easy to follow. Many thanks indeed

@somanathsshenoy Жыл бұрын

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

@bhagyashreeaher7429 7 ай бұрын

Great content !!! Very helpful Waiting for full series Thanks

@emiliokimotho Жыл бұрын

Best networking explanations ever. I am becoming addicted to this channel.

@PracticalNetworking Жыл бұрын

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.

@dustcore Жыл бұрын

Ed thanks for the great break down. This definitely helped improve my understand of how TCP works.

@PracticalNetworking Жыл бұрын

Hi WemDizzle, glad you enjoyed this one too. Cheers!

@freebyte1983 2 ай бұрын

perfect , TCP Master class , thank you sir.

@PracticalNetworking Ай бұрын

You're very welcome =)

@132131313100 Жыл бұрын

I'm a software engineer who studied CS in uni, but I somehow graduated without taking a proper networking class. Now that I'm working towards a SRE position, your videos has been immenselly helpful like I can't emphasize it enough. Thanks for your hard work! Easily my favourite channel rn

@michaelfoley7991 Жыл бұрын

I was a dev for about 10 years before I switched over to net eng. I discovered that devs have no understanding of networking and networkers have no understanding of development. I was blown away at just how insulated development is from the necessities of transmission. Heck, when I finished my CS, I still didn't know what a port was because it never came into play with any software I created. The closest I ever had to do was build a WiFi connector back in 1999 because there wasn't any sort of connector at that point for the type of work I was in.

@UnixBro 11 ай бұрын

Do you think that a software need a certificate like CCNA to become a good SRE ? Thanks.

@UnixBro 11 ай бұрын

@@michaelfoley7991 Do you think that a software need a certificate like CCNA to become a good SRE ? Thanks.

@bethankfultogod4538 Жыл бұрын

Thanks for breaking down TCP to easily understand.

@rudranahak8067 Жыл бұрын

I am from india ,just interested in networking and your videos were my building ground,before starting my undergraduate journey ,still no completed ,and I will meet you in person and thank you someday for you excelent teaching sir.

@chezwoods7575 5 ай бұрын

PHENOMENAL JOB SIR! THANK YOU. So easy to follow and understand. clear and confident information.

@PracticalNetworking 5 ай бұрын

You are very welcome

@useruserus844 9 күн бұрын

Very cool explanation, for sure need full master class

@DJ_Vaiju 8 ай бұрын

hats off to your CN course dude . Very Nice 😊. Keep it up. GBU. ❤

@ssh-dev Жыл бұрын

This was a great explanation ❤️

@vxcute0 11 ай бұрын

you are amazing bro, thank you, best explanation I have found and very good animation

@YaseenAliKhan804 Жыл бұрын

You are working hard sir. Keep going watching from INDIA

@PracticalNetworking Жыл бұрын

THank you, Yaseen!

@nobody2anybody Жыл бұрын

Thanks ed, waiting for your full TCP and UDP series ...

@akhileshkaushik1231 10 ай бұрын

You are doing an amazing job. God bless you.

@bill0cao 7 ай бұрын

What a great teaching! Thanks!

@ikopysitsky 11 ай бұрын

Great video! Looking forward to more content.

@triumphant_54 2 ай бұрын

you're good at this Sir. Hat off to you !

@ermarkar3375 Жыл бұрын

Thanks!!! this is the Best TCP explanation...

@mridul_433 6 ай бұрын

This is precious . very clear and mind blowing Knowledge , Thanks is not a complete word Need more in cloud computing please help to know

@PracticalNetworking 6 ай бұрын

Yes, that's the plan getting into cloud computing!

@manigandansrinivasan5194 Жыл бұрын

Excellent ..Never seen complex topic explained simple way....

@PracticalNetworking Жыл бұрын

Glad you enjoyed it =)

@newbie8051 10 күн бұрын

Great refresher thanks !

@Synth5069 Жыл бұрын

deserves more views honestly

@PracticalNetworking Жыл бұрын

;)

@mohammedjaffarsadiq5914 2 ай бұрын

Really indepth explanation, thanks a lot

@Gurl_nnnn 6 ай бұрын

Thank you so much for making me love networking !!!!

@user-vc1xw8vq5k Жыл бұрын

Thanks alot....perfect explanation sir

@rpinto8800 Жыл бұрын

Thank you, really good explanation!

@benhurkachhap1480 4 ай бұрын

@PracticalNetworking Great breakdown and explanation with graphics. The complete TCP advanced video is what I will be looking forward to. May God help you to make it soon. Thanks so much.

@PracticalNetworking 4 ай бұрын

Cheers Ben. Glad you enjoyed this =). Thank you for the kind sentiments.