TCP vs UDP Comparison | Cisco CCNA 200-301
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The two primary protocols at the transport layer are TCP and UDP.
A network application has to choose how to send its data. That choice comes down to reliable or unreliable transmission.
Both reliable and unreliable have their benefits and drawbacks.
TCP (Transmission control protocol) is the most widely chosen option for transmitting data. This is because it can reliably send and receive data.
The way TCP can provide such stable and reliable connections is in three ways.
1. Acknowledgements
2. Sequencing
3. Checksum
But, before any of that can happen, first we need to start a reliable connection.
TCP does this by using what's called a three-way handshake.
1. SYN
2. SYN-ACK
3. ACK
Now we have an open TCP connection. A similar process will be followed when closing this connection as well.
UDP (User Datagram Protocol) has none of the error handling, sequencing or reliability of TCP.
You can think of UDP as a kind of machine gun of data. Just firing and firing not caring if data is lost or not.
While TCP offers great connection and reliability, it comes at a price or resource and latency.
Where UDP is very useful is in a situation when we need live, real-time connections. For example, voice calls, video calls, and gaming all need fast real-time connections.
That’s it for the TCP and UDP, two ways to send data, for two different purposes.
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@@Certbros Almost there to 100k! I already have my CCNA and I'm using your videos to review the material for an interview. They're gold! Thank you so much!
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You guys are honestly the best source I have found for this type of information. The detail and visual aid go so far in communicating these ideas and the way you explain these things just makes it so much more clear than any other source I have used.
rooter
I can not wait for util you drop the full CCNA Course, your explanation on a topic is amazing.
Thanks Stephon I really appreciate it. It might be a little while yet but its comming along nicely
I am also waiting
Incredible how well-made this content is. Compared to the official Cisco material, this is actually useful!
This is my first CertBro's video and I really like how the explanations are simple and clear. Event a total noob will understand the information contained here easily.
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So good. The graphics are just enough to reinforce the point, and not so over the top that they distract.
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Thanks for this masterpiece of an explanation 💯👍
More than wonderful explanation ... I hope with all my heart that you will continue to publish more of this high-quality content ... I follow and support you from Algeria
Great to you see you again CertBros!
Thanks Robert! Feels good to be releasing new content again!
Hands down best explanations on the internet, this is crazy ❤
Thank God for this channel
TCP is a experienced truck driver while UDP is a pizza delivery guy on a motorcycle.
Extremely clear and concise. Thank you!
I really appreciate all of your videos
Subscribed .You made it so simple to understand.Shame on google who assign instructors who lack basic teaching skills for their IT support professional course.
Comprehensive as always. Looking forward to learning more from you. (y)
Thanks you. More videos on the way.
This channel deserve million views, the most underrated channel.
I just found your videos while looking up definitions-- I keep getting lost in my IT certification course. This helped so much, I'll definitely be using your videos to supplement my learning. Thanks!
Hey
What an explanation, recalled everything, loved it.
I am a career data analyst and architect. Never spent any time learning network stuff. I am currently setting up some VMs in Azure and want to know something about the Vnets that go with them. This series is great. I won't be an expert when I get to the end of the series, but will know a lot more than I do right now. Great quality.
i really attended in pleasing mood ! i dont go to school as far as gifted r available , much thanks !
I think I love youu Lol. I’ve been taking IT courses and I’ve been looking at different videos for a better explanation and you have been the best I don’t need to look any further. You made me understand alot of the material I’m working on and I’m actually excited to learn again. Thank you so much looking forward to watching more of your videos
Haha! That's really great to hear Mahogany! 👍 Love that these videos are making you excited to learn more! Keep it up 😁
Great content and amazing explanation. Thanks to have also provided the content in textual format. Helpful in taking notes
Thanks Abhisek, glad it was helpful! Written content to complement the videos is definitely something I want to try to include more. Great to hear it was valuable.
You are very good in explaining, quality of your video content and pace tops it off!
Thank you! Great to hear you liked it.
Wow that was a great video on a very basic and important topic.
Learned more deeply on tcp structure and udp structure
and the data flow from the computers in point was nicly doen.
Continue making this great content and this great videos about more important staff of CCNA because you are doing great job and I think your channel is awesome and we need more of it.
Thank you! Glad you liked it.
Best video out there! Great explanation.
I finally understand tcp now… thank you so much!
Great channel. Nicely explained. Thank you! :)
Thanks for that explanation.... Very important to know differences between which apps use UDP and which one TCP's.
Thank you 🙏🏿
Made it easy to understand
I started Netowrking course and been struggling to understand this but this video really helped.
Just found your channel. For me (diy network enthusiast) it is more than helpful. Nice work mate 👍
Great to hear you're enjoying the videos! Thanks for watching 👍
New CCNA uses this model, thanks for the update. 👍
You're welcome. Thanks for the comment!
Thank you so much for such a clear explanation. This is so much better than other education site. =D
Thank you. Glad it was helpful!
Best explanation so far!
Thanks Mark! Glad you liked it.
Good explained. Thanks so much!
This is great, keep up the good work!
Thank you Chief!
brilliantly explained ...thank you so much
Glad it was helpful!
Very clear and helpful. Thank you.
So easy to understand thanks for explaining !!
No problem Josh. Glad it helped.
Im having exam tomorrow and i get to see a well edited video noice !!
Lovely video. Thanks!
Very helpful video. thanks a lot
its really helpful,thanks
Great explanation ! thank you !
You're welcome Captain!
Continue, your explain is amazing 👌👌
Thanks Mouslim! Appreciate the comment 👍
Thanks so much for this excellent video. Second one I watched on what was for so long mystery numbers to me lol
Haha glad this videos helped clear it up! Thanks for the comments, really appreciate it 👍
Great video I like the explanation! But I need to know what exactly the acknowledgement numbers do?
you make it really easy ! thanks
Glad to hear that! Thanks Mohamed.
Fantastic!
Great explanation. Thanks.
Thanks. Glad it was helpful!
thank you so much
Great vid
It is explained very well .
I understood better than the college professor.
Great to hear Cristiano! 👍
Great👏👏. Thaks!!!
Best.Explanations.Ever
Thanks! 👍
Thanks, it is so useful
Thanks Omar!
Me failing exams,this guy holding my back and teaching way good than my lecturer
Jesus!! I go network and it security, we are not at NET, and these videos explains allot better then my school… i feel so lost at school prob bc the teacher i guess
Please do a video on BFD (Bidirectional forwarding detection) too. Thanks.
thanks you sir for the explanation
You're welcome!
What a legend
Thanks Daniel!
Thank you
Extra ordinary channel keep it up bro I am seeking more videos from your channel
Thank you!
I'm a Bachelor of telecommunications and i've never heard anyone explain things as well as you, thank you!
Wow thanks! Great to hear you like the videos!
Isn't this very basic stuff? I'm not from America or any other English-speaking country, so our school system is a bit different than the American one, but I've learned about this stuff in the second year of High school (here high school lasts for 4 years).
Got it!
Nicely explained
Thanks Narendra!
Thanks for the knowlegde...
Sorry, what is a lateny please? Is that the speed at which the data or file is sent? Thank you for these great videos. Thank you.
If you write 60 bytes in a UDP packet, then all the bytes are sent (wrapped in proper headers). If you write 60 bytes in a TCP packet, then you might get one or multiple packets, incuding some with 0 bytes data (with wrappers), or it might wait until, about 2/1000'ths of a second has passed before sending the packet. So, when you read the TCP packets at the other end, you have to know when to keep reading. A simple solution, is to add your own header, into your tcp ip packet sent. and then you can tell where one ends, and one begins. Another solution, is to use two UDP lines, where each side, have a client and a server.
Good, very good!
Thank you!
Excellent video
Thank you. First comment as well! 👌
@@Certbros Thank you . Excellent put together presentation.
ty
ty, sir
what is the need of checksum in a udp header if it doesn't care about some lost or corrupted data?
do you have videos for the other TCP Flags?
U r the best
Very useful i help you make other videos about elctroniqus or PLC ... because you have a good methode of explaining
Thanks you Rachi! Glad you like the videos!
CertBros: Sending knowledge
Me : Got it
CertBros: Roger that.
@@crowmack ohh you replied.... thanks
i have a question, UDP is used for live connections right?, is a Live stream like twitch considered a UDP?
I love these videos btw! I am starting an apprenticeship within IT networking on Monday and I have been trying to research information. Your videos are the most beneficial and well explained! Are you british btw?
Thanks Cody! Great to hear you like the videos. Good luck with the apprenticeship next week 👍 Haha yes I'm British. Did my accent give it away?
@@Certbros Haha, yup! It's refreshing to see a fellow brit on these types of videos! We're the best kind ;). Thanks man, keep the great content coming!
Thanks Cody! Appreciate it👌
Amazing...
Thanks! 👍
UDP good for situations where if the data was resent, it would already be useless, which is why it is good for realtime. If a part of a voice call is resent and received 2 seconds later, it is already useless.
The moment you describe UDP as machine gun got me laughing so bad
🤣 Glad you liked it!
i love all your videos please let me know where i can watch them from very beginning
You can watch the playlist here on TH-cam. I'm still making the course and regularly uploading videos here as well. Glad to hear you're getting value from them.
@@Certbros thank you i really appreciate your hard work.
No problem at all. You're very welcome.
Thanks a lot sir,love from pakistan
Can I know by when can we expect the full videos
Working on it now. There's still a lot to cover but its comming along nicely. Im hoping it will be later this year.
UDP is like the way my professors teach.
🤣🤣
♥️♥️♥️
❤️
what is checksum?
Why checksum for udp??
Wow
Why is there no NSP (not stupid protocol)?
NSP sends all data in one
Sending data got it 😂😂
now i cannot ignore imagining tcp as two people just sitting in each ends of a room shouting SENDING DATA.......GOT IT
to each other XD
how much does your CCNA course cost?
It's not ready yet but when it is it should be around $20. If you sign up to the mailing list in the description I'll send out a discount code when its launched.
@@Certbros cant wait!
Shout out sa CSU BSIT dyan.
i be twerking to the intro , its jamming fr