What is a Protocol? (Deepdive)

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The term "protocol" can be really confusing. In this video I try to explain to my former self what it means to have a protocol.
Chapters:
00:00 - Intro and Motivation
00:28 - "Protocol" Word Definition
01:48 - The HTTP Protocol
02:42 - RFC 9112 HTTP/1.1
06:35 - Web APIs are Protocols
07:50 - RFC 9293 TCP
11:02 - What Is a TCP Port?
12:30 - Why Is TCP Working This Way?
13:45 - Hardware Protocol UART
16:16 - Protocol: Rules for Communication
17:20 - Protocols for Hackers
17:52 - Outro
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[@skwalex]

I've never seen anyone explain things as good as you do

[@uwiqgfu7epvnsbnld259]

because he really understands it xD

[@konradkos1981]

Would it be possible if you could describe Threads vs Processes and how Operating systems manage processes? It is one of the more difficult concepts and I think your talent in teaching would be of great use. Other videos confuse more than clarify because they all seem to contradict each other on minor details. You give a great explanation because you describe these concepts on a large scope and abstract away trivialities.

[@whannabi]

Good idea

[@Miles-co5xm]

+100

[@brucewayne2480]

Good idea, I'm genrally confused between the real thread (physical) and the virtual one , the meaning of thread in operating systems , When I create a thread in nodejs for example , does it mean that it will wait until a physical thread or virtual one runs it ? When I fork a process what happens in my cpu ?

[@Miles-co5xm]

@@brucewayne2480 just to make you more confuse, physical threads don't exist virtually, but virtual threads exists in physical when the realm changes from 3d to 2.5d, which makes os a software running on single thread and multiple virtual cores.

[@brucewayne2480]

@@Miles-co5xm :/ !

[@viniciusleitepereira5571]

This Deepdive series is fire 🔥 Keep doing the good work, sir!

[@LazizbekYusupov92]

Man, he should go deeper and wider with a complete tutorial on Computer Networks academic level!

[@belalal1902]

Please make more (Deepdive) videos! They Are great and very informative

[@jothamprince8765]

Hi, I'm a second year computer science student and I cannot stress how much this video was helpful to me, it really came in a time when I was struggling to understand some advanced computer networks concepts, I was actually struggling to design a protocol when I didn't even know what It means, thanks a lot man, the explanation was very good, simple and precise, I really appreciate it

[@anthaguz]

This is possibly the best video about this topic I have ever seen, you are excellent at what you do! I appreciate the content and will keep visiting every time I can!

[@AuroreSadi]

Man you make this so fun and easy to digest with the supportive visuals

[@vinaykumar-qe4zx]

This deepdive series is invaluable....please keep doing this

[@buckwheat2323]

I definitely like where these deep dives are headed. You have a wonderful way of boiling down complex subjects. My suggestions would be an exploration of SSL/TLS.

[@nopsep3139]

I speak Spanish, and having subtitles helps a lot to be able to understand everything you're saying, because I know English, but at a medium level. Also the fact that you explain things so thoroughly, starting from the base, makes your content great, I will follow this channel forever and I will always recommend it, among the best alternatives.

[@danielh2833]

Love it! I'm hearing a Telematics lecture this semester and these Videos are a great addition to help my basic understanding of the subject. Thanks :)

[@a.for.arun_]

Thank you so much for this video. Much needed one for me. Please continue this deepdive as a series.

[@skeeberk.h.4396]

You're warming up to me, Finally Explaining stuff without a passive Condescending Tone , Amazingly Done 👍🏾

[@bendomino8476]

Oh man, I have no words but just an exciting feeling to finally understood or just at least get a glimpse of these fundamental knowledge and not just hacking stuff. Wherever you are, Thank you LiveOverflow.

[@techfunwithaadil]

This is what i am searching for since 3 months thank you

[@rajatchopra1411]

You made the server concept "click" for me. please continue this deepdive series as more topics need to be unraveled like this

[@Makbetjuz]

Thanks for making this video. I hope that my comment from the last deepdive series video about what is a server partially helped you decide on this particular topic :)

[@BarraIhsan]

I love the deepdive series so much! I never knew about protocol this far!

[@madmushroom8639]

Great video! To even dive deeper: A very interesting part of TCP is also the Congestion Control to optimize bandwidth utilization. It is still a huge research field at e.g. Google and KIT...

[@Agnubis]

Great video as always. I've often found the concept of protocols a bit enigmatic but this was really helpful!

[@OhMyJawsh]

Just an additional bit of information, whenever going into the TCP protocol. In the TCP 3-way handshake (SYN, SYN & ACK, SYN), all of those are controlled within the TCP header in a section called "control bits". There's a total of 6 control bits that you can choose from; URG (Urgent, used to indicate packet priority), ACK (Acknowledgement, used to acknowledge connection was successfully established), PSH (Push), RST (Reset the connection when a timeout or error occurs), SYN (Synchronization), and FIN (Used to terminate connection)

[@nikensss]

extremely unvaluable content. I would also been very grateful for having content like this available when I was in university. It also helps now to clarify ideas and better understand all these. Thank you very much!

[@king09426]

This series is proving to be the one is always wished for.

[@nicof_2000]

Amazing video, I didn't really learn anything new, but your "style" of explaining things is really good.

[@lethalz4519]

Wow ! This is a great explantion and i like how you reference the RFC's . Great timing on this changed my whole paradigm on Protocols for life.

[@JordanPlayz158]

Anyone who goes through the time to read and implement those protocols (by reading the RFCs) are.... mad lads

[@mrstark7491]

Great explanation!!! Please make more such videos on other networking basic concepts Cheers!

[@conando025]

A good topic for a standalone video would be what is a program and what happens when i execute it. Of course that's such a broad topic that no one video can do it justice but i feel like there is a big gap between the layman's understanding (an exe file that just does things when i click on it) to the understanding of the program being run with arguments and then getting loaded into memory and what do all play into this. I don't have to many concrete ideas but from what I can see in my fellow CS first year's is that this something they don't really have a grasp on and just take it a some magic

[@type3gaming851]

This is the best explanation I've seen about this topic! Good stuff man

[@shubham_srt]

a video that i wish existed back when I was learning protocols, great job !!

[@tepesalexandru7855]

This video was amazing! I took lots of notes from it, you're inspiring!

[@a11aaa11a]

This is useful even for seasoned web developers imo, at least it was for me personally. It's good to re-solidify fundamentals from time to time! I hadn't thought of e.g. the Twitter API as a protocol, but it's obvious in retrospect.

[@princemehra12]

I love how you have explained the Protocols

[@vietanhlehuu]

Amazing video, the way you explain things is the best. Please make more videos deepdive like this.

[@Bananabeacon]

Thanks! I love figuring out exactly how things work and this really helped me with that!

[@jingkangloh7710]

This video is the answer to my search for the question for so long!

[@zFake]

This is such a great video. It helped me a lot to consolidate my knowledge and to see learning from a new perspective. Thank you.

[@zaheer4511]

i think you're gonna finally taught me what networking is all about. I bet your 17 year old self is grateful to you!!!

[@PotatoGodzilla]

This is amazing as a web developer I'm very grateful for explaining it so well for me!

[@Radium_227]

I have been watching KZbin for a better part of my life and his video's 15 sec intro just made me subscribe love the honesty and motivation.

[@eduardorios6463]

I love this format! Awesome video dude 🤙

[@Code12x]

I didn't even watch it yet, but I would have LOVED to have had this video like 4 weeks ago when I started my research paper on Internet Protocols... anyways, can't wait to watch it!

[@FRSilent]

Charles Petzold's Code is a really great read imo that expands on this & goes over the historical context of shared communication protocols & their evolution. Worth a read! :D

[@denni_isl1894]

You are a gifted teacher. Period.

[@oufcoufc6700]

This video is really crazy, clearly explained everything with examples

[@TheCameltotem]

Love this series. More of anything please!

[@foor]

This was a very good video explaining protocols in the finest details! I would definitely show this to a friend if they asked me about a this.

[@Zakurbeltza]

Very nice explanation, helpful to capture get a grasp on a big picture about protocols. I am now learning about the in HTB academy and I've found it very insightful. Thanks!

[@yosiyosiro3866]

thank you, this is my favorite segment in this channel. Maybe next you can explain Service Bus, Message Broker, Serialization, Interface, and other jargon in IT that made people confuse. Thanks a lot for video.

[@kim92se64]

Yep, That's what I was looking for !!! Awesome work

[@TomKwan]

Very detail but easy to understand video! Thanks

[@GreenClover0]

Very good video. I actually have a short oral exam in two days of how UDP, TCP and some others exactly work and this video was very helpfull :^)

[@nieczerwony]

As computer/electronic engineer I was fed up with all this protocols/communications like this. UART, I2C, SPI, USB, ZigBee, BT or even CAN, but also many others. But with time I understood how much it helps when you go for higher level applications etc. GR8 lecture from yourself as usual.

[@user-ju9qg5po1e]

Thank u for the informative video! It really helps me to understand what is protocol.

[@whydidyoulie8625]

finally! it's all begining to make sense! thank you :)

[@mayank-ir7tm]

You have the best explanation skills! Thank you for this!! :)

[@benfrese3573]

More Deepdive please. Amazing content!

[@zew0zz]

Bro I just got into cyber security and I was confused about protocols. This video helped me a lot 🙏🙏

[@uwiqgfu7epvnsbnld259]

wow best video about protocols ive ever seen

[@anjuro]

Very informative video! If you end up making more I think going into how networks are structured might be an interesting topic (e.g. locally, when connecting to a website, in a lan configuration etc).

[@GeorgeValkov]

For network protocols, just grab Wireshark and see how they work. So far I implemented a UDP stack and a web server and it was easy. Also WebSocket. As a second step, reading the RFC helps a lot. Reverse engineering is a good way to start.

[@iftakharhusan]

Thank you for this awsome explanation. Looking forward to more of these videos from you.

[@satyaranjansahu336]

Another great explanation!. Kindly make a deep-dive video on OSI Model.

[@efkastner]

This was awesome! the term that confused / bugged me for the longest time was “pattern”

[@sanatanharsh]

Great video,love it . Would love to see a video about certificates and their working

[@andrewfedorov9198]

Wow! Dude. You think exact the same way that I think and I was wondering about such things. I really wanted to get what they really means. Now I get it. Thank you!

[@arunprashanna7494]

Thanks for the good video. It cleared many of my doubts.

[@user-wb7ot7kt3x]

You are so much more helpfull than my teacher.

[@eleos5]

I would be very happy if you made more videos like this.

[@Filaxsan]

Such a great explanation! Just...thanks!

[@majdikhalil3927]

Thank you for the video, really clear !

[@_TravelWithLove]

Vielen lieben Dank für deine inhaltsreichen und intelligenten Videos !! Educational und wisdoms filled !! Awesome stuff !! Greetings from California … Ich wünsche dir euch gute Gesundheit, Erfolg und Freude !! Much Love ✌️😎💕

[@xB-yg2iw]

These Deepdive videos are awesome keep them coming :)

[@ananyamishra382]

please never stop making such videos

[@mingxingchen3797]

Many people have understanding problem, so is this the video author. Protocol is just a way of communication between two parties. Very easy to understand. Just like two people meet one say "Hello", the other also say "Hello", one say "how are you doing today", the other say "Pretty good, how about you?"... Client and Server in communication have to follow certain protocol to communicate.

[@HeyHoLetsGo32]

Trank you so much, helped me relate http with (until yesterday completely unrelated in my Head) UCI or CECP, the Chess engines protocol for communicating with an end User and with another

[@treemallow757]

thank you so much bro this series is fireeeee

[@igreeuropa]

Thank you im in the industry and this is refreshing.

[@ar_prichan]

your hardworking must be appreciate!

[@benjaminehng812]

extremely well explained!

[@Kugelschrei]

Amazing. I will implement networked Multiplayer to the game I am working on next year, this has been a good introduction :)

[@nickguerra8460]

Great content, thank you for this explainer.

[@laramieist]

Thank you so much! Now if I could just learn how reverse proxies work. I know kinda how they work but always setting one up is so difficult to me.

[@iHouqLF]

Great Video! :D Another interesting topic for a video would be the OSI Model.

[@cerberuspwned]

Amazing explaination sir ! Really helpfull for a freshman like me

[@nikhilsinha2191]

the tcp explation was great

[@seraphina985]

This really explains something that has only been hinted at recently when terms like PPEoE/PPPoA became common parlance due to broadband. This literally describes the function of nested protocols in action the o represents over thus in both cases PPP (point-to-point) is encapsulated in something else, PPPoE means you are sending PPP over Ethernet, PPPoA is over ATM. But there are more layers if you have a PPEoE connection and attempt to read youtube you are sending SSL over HTTP over TCP over IP over Ethernet to your ISP. In short you are encrypting your data sending it over HTTP which uses TCP and IP via your router which basically assumes the rest of the world has just one IP (PPP). These layers of abstraction get stripped as your message heads to the destination, your ISP strips the PPP and ATM/Ethernet layers. IP transit then gets the packet to the server which then uses the TCP layer to figure out which program to wake up to process the payload.

[@skylo706]

This was a REALLY amazing video, just fantastic

[@waterflowzz]

Teachers in schools should be teaching the way you do, by logically explaining each step of the way but unfortunately the main method of teaching in schools is by memorization. Much of that is do to the fact most people don’t know how to break down the thoughts to the “smallest atom”. Awesome explanation. You should be a university professor.

[@noctavel]

Please continue with this series

[@nameless5724]

Amazing Explations thanks for this.

[@alexandreschaffner8686]

Incredible work 👏

[@jonas.backpacker]

Awesome Video! Thanks for explaining it👍🏻

[@ragsbigfella]

Beautifully explained. Thank you so much. Can you please make a detailed video on browser dev tools?

[@Kuriom_Mandara]

❤the best explanation I have encountered! Thanks ❤

[@anatolyvaic6427]

Perfect explanation!!! Please make videos about SMB or LDAP

[@khushdaily]

We need more this type of video 🤠

[@RafaelBernabeuAbrao]

man.... you are awesome!! thanks by sharing the knowledge!!

[@velocity7304]

Thanks this was super helpful!

[@lautarolopez5372]

beautifull explanation

[@hakimmaher9467]

I really liked the video ! the word "Framework" is also a little bit confusing may mean some sort of "library" in programming language , may carry another meanings in the firmware and used in software design ..etc

[@ThePowerRanger]

Great video, more of these please.