I'm a software developer with a little networking background. Today I've learnt a lot more networking knowledge than my 5 years at the university. What a brilliant video. Thank you very much.
When you can listen to something like this as a podcast (not watching), while working on something else (I was tidying up), and can understand everything that was talked about then you know that the person talking not only knows what they are talking about, inside and out, but can also explain and teach it clearly. That was excellent 👌🏻
It really shows how much Chris is more experienced with teaching. A great way of repeating the same thing in different ways until it makes sense. That's why I like your videos, guys. Overall very informative video, about Wireshark and TCP both.
I'm loving these interviews with David & Chris. Really is valuable. 2 networking pros having a talk like a teacher & student scenario for us beginners to understand better & making it more engaging. Thanks so much!
Can you create a playlist containing all videos with Chris? This was so invaluable and combined with reading TCP/IP Guide it all makes sense. Thanks all!
This is so well explained. I will use this video as a complement to the training I do internally to colleagues. I'm somewhat THE tcp and Wireshark guy at work, and often gets technical questions / request to troubleshoot something, even protocols I never worked with. Here's some things I really liked in this video: - When you mentionned to ''Please capture the TCP handshake''. You're so spot on ! It's just so critical to have - In TCP Options, MSS is not negociated but announced. (so many times I had to tell people this) - SACK has to be enabled and announced in both Syn and Syn Ack. Here are some suggestions of topic you could discuss in the future: - Same video with ICMP (explaining all the codes, etc) - A bit more depth on MSS (MSS vs MTU and fragmentation issues....just had one yesterday! :) ) - Get some packet loss captures and demonstrate where is the packet loss (example: If you see original packet + retransmission you can assume the loss is after the capture point, etc, etc) Great work !
I recently started my journey with wireshark indepth... came across this session and would like to thank you both for explaining tcp handshake with so ease and detailed !!
Been following Chris for long time and having watched his all TCP wireshark videos, it's glad to have you here digged deeper TCP again for us. Thanks David and Chris.
-Great content professor David Bombal, and Chris Greer...!!! -Always nice when we look at the essentials in depth again. -TCP/IP, Three way handshake is the basis of almost all communication that we have in the network. -Great, this conversation and remembering in depth what we studied with the view of colleagues....!!! -Thanks for the knowledge teachers David Bombal, and Chris Greer...!!!
This was outstanding! Not only did it show me the true value of Wireshark, it taught me more about what is happening between the client and the server. Great work!
Unlike the John Hammond video, this content is extremely valuable. Chris is an expert in the networking/packet analysis field and did a beautiful job breaking down these concept so one learning Wireshark gets the most out of the data packets and software. You need to create a play list just with Chris, having all his topics under one place. This just might be the single best educational video on the 3 way handshake on TH-cam. I would like to see common problems/solutions that occur often in the real world where Chris would be called out for diagnosis.
i watched the video on pluralsight explaining the tcp, and i think this is the most simplified explanation, the questions from David make the difference. and expiations from Chris were great. thank you all.
Spot on, there is so much info to take in, will need a few repeats, but loved the indepth walkthrough, really helps to understand. Chris's enthusiam is brilliant, you kept the pace managable, like slowing to 10base from Chris's 1000base. lol thanks
Suggested topic: 1) hosting onion sites, darknet webservers. 2) tor relays and bridges, 3rd party server setup to contribute directly to tor with a fixed budget instead of donating money. 3) ethereum contracts, solidity patterns and confirming / checking release of funds
I'm studying for my CCNA and I need all the help and insight I can get for each of the layers of the OSI / TCP model. Learning about the handshake and the behind the scenes down into the raw numbers and why the packets are what they are and how each client frames up the numbers is great, so thank you! I'd love as much real life troubleshooting as I can get, down to why each possible problem might end up showing itself. It can be overwhelming for sure and just reading about it can be so dry it's hard to hold the knowledge but with video examples like this I believe it will help a lot.
Thanks for the video! In my professional life, one of the things that has really distinguished my more senior colleagues is their ability to understand TCP/UDP flows during troubleshooting. This video really helped me get an idea of what their brains may be thinking when we troubleshoot together! This is a video I'll watch multiple times.
I took a course that walked me through tcp among other things, but i didnt understand the importance and utility of it till watching this video. I very much appreciate the knowledge. Thank you both for your generosity in sharing with us all.
I'm mainly a developer with little to no network background. But this really helps. And i love the way you both interact with each other to make it even more understandable. Heck i really put out my notepad and wrote some of the things down to learn this properly. Thank you both very much.
Thank you! Thank you! Thank you, David and Chris! I'm currently taking a college TCP/IP course & I think I've learned more in the last hour than I have in the last month! Our textbook is the TCP/IP Illustrated (2012) & although I I'm blown away by the technical details, I barely understand any of it. I also spend an ungodly amount of time researching what's still relevant. I've used Wireshark many times, but this video helped me UNDERSTAND it. TCP/IP is a prerequisite for my future Firewalls/Network security, OS Security & Routers classes, so I'm grateful for these videos to help me learn such a daunting subject. Please keep this series going!
This is the most valuable video i have found on youtube or anywhere regarding packet sending. The only way it could be extended more is how the actual wire (or photo optic) is transferred from point to point. This video is priceless and belongs in Universities as a compulsory IT or Comp Sci must watch
I know this is a two month old video, but I just wanted to thank you and Chris for putting this information out there. I have learned a lot from watching Chris' Wireshark videos, but this has been very educational as to why I am seeing what I see in the captures. I am not a network engineer/admin, but I end up spending a lot of time at work having to analyze network traffic because the application I support for my company is very latency sensitive and videos like these help me speak a common language with network folks to help get to the root of a complications. Thanks again for this and I am eager to dive into more!
Absolutely love this content. Most content that are on the web that pertains to tcp are explained in a very complex way. I love how Chris makes this very dumb down for the average person looking to learn tcp. Please continue this series as its very interesting and provides invaluable knowledge.
1:47 troubleshooting starts from tcp 4:13 lets see three way handshake 7:11 the sequence number 10:10 Wireshark speak to us 26:18 the key to understand tcp 29:21 David summarizes 30:38 Chris method 34:50 options 37:00 flags 41:53 window 44:00 swimming pool
Hey David, This video was just awesome. I am currently studying medicine but I've always been interested in computers. Once I'm done with med school I'm going to start with a computer science course and your videos keep my interest ignited. Thanks a lot !
The TCP RFC was published the year I graduated High School... Absolutely LOVE LOVE LOVE this video. I can't wait for more! I've been working in IT most of my adult life---and I need to take things to the next level..I might be 58--but I really feel I have a decade or more to contribute.
Are you worried that networking is rapidly moving towards the 'networking as a service' model in which indivdual network engineers will become far less required as the service providers will only keep a few high level engineers and use low skilled people to do what used to be network engineer tasks? I'm 10 years younger than you and worry a lot that 'traditional' network engineer jobs will run dry in 5 years or less?
@@dopiaza2006 to a degree, yes. The Network as a Service Model is already invading the small-medium sized business market, reducing the need for in-house network engineers or even consultants. However, where I see growth is in the wireless segment...that and in Security Ops.
what a brilliant way to teach TCP.. i am at 32:46 but till now i can say that i have learnt a lot in this video about protocol working, sequence numbers, wireshark filter setup etc. etc. I really like combination of these two persons. A very impressive tech talk regarding networking protocol.. Great video.. #TCP/IPDeepDive
Great video and great explanation by both parties, like all other commenters have mentioned is a really valuable discussion. From the window scaling factor provided by the server (512), I assumed that all packets sent from the client to the server and vice versa would stick to the window scaling size of 512. But from inspection in the provided pcap file, the client remained the window scaling size of 64 (as indicated in the options header of the client SYN packet) while the server continues to send packets with the scaling factor of 512. Hope this clarifies anyone's doubts on the window scaling size of both client and server. Both of you have been so resourceful I'm so happy for this series.
I decided to not watch this Video when i saw it's too lengthy , but today, due to some Un-stable situation in Africa , i got off from my Work, & Watched the Video , it really helped me
Hi, David! To be honest i found your CHannel by chance, and i think i am lucky. David, i am just little modest simple man, but if you would read this i wish you and all your relatives Health and Wealth, you content is always helpful and usefull for me! Thank you, man!
// MENU // 00:00 ▶ Intro 01:32 ▶ The beginnings of TCP 03:57 ▶ Three way handshake 07:20 ▶ SYN meaning/explanation 08:50 ▶ Port numbers 09:58 ▶ What actually happens in the handshake 14:19 ▶ Common starting TTL values 15:04 ▶ Why we need SYN numbers 16:11 ▶ What actually happens in the handshake (cont'd) 19:00 ▶ Q&A (SYN,SYN-ACK,ACK - Sequence numbers - Increments - Tips) 33:01 ▶ History of TCP 34:44 ▶ TCP options 36:56 ▶ TCP flags 41:53 ▶ TCP Window - window size and scale 59:04 ▶ MSS (Maximum Segment Size) 59:49 ▶ SACK (Selective Acknowledgement) 01:00:13 ▶ Conclusion // PCAP File // Wireshark TCP pcap file: www.dropbox.com/s/l5p8ofik86zeieh/TCP-Handshake_ChrisGreer.zip?dl=0 // MY STUFF // www.amazon.com/shop/davidbombal // SOCIAL // Discord: discord.com/invite/usKSyzb Twitter: twitter.com/davidbombal Instagram: instagram.com/davidbombal LinkedIn: www.linkedin.com/in/davidbombal Facebook: facebook.com/davidbombal.co TikTok: tiktok.com/@davidbombal TH-cam: th-cam.com/users/davidbombal //CHRIS GREER // LinkedIn: www.linkedin.com/in/cgreer/ TH-cam: th-cam.com/users/ChrisGreer Twitter: twitter.com/packetpioneer Pluralsight: TCP Analysis Course: davidbombal.wiki/tcpwireshark // SPONSORS // Interested in sponsoring my videos? Reach out to my team here: sponsors@davidbombal.com Please note that links listed may be affiliate links and provide me with a small percentage/kickback should you use them to purchase any of the items listed or recommended. Thank you for supporting me and this channel!
@David Bombal Hello, We would like to listen about future of Data Sciencist ,plus their Job roles. Your Thoughts will be great to us who Interest and will invest their learning in this data scientist roles . Thanks since now on.
It's been amazing experience watching two of you explaining TCP basics in wonderful way. Would like to see you both covering TLS as well. Fingers crossed 🤞
A lot of IT guys say you don't need college. This is the kind of stuff you learn in college. College does very much add to the richness of information used in all aspects of IT. I would just like to thank you so much for sharing, it was a wonderful recap.
@@lennyaltamura2009 We love to hear it. Wikipedia happens to actually have good information on IT topics that are purely engineering oriented like IEEE specifications and standards.
Found a little gem with this video and I've never seen such a breakdown. Wireshark seems so much simpler now. I'm looking forward to taking networking to the next level with you guys, thanks!
Thank you David and Chris for this fanstastic session. These sessions are really empowering and the in-depth knowledge that is imparted through this video is enlightening. I am truly grateful for this. Once again, thank you David and Chris.
I'm starting my studies in CCNA and I have been following you for a while, a lot of things I still don't understand but, I woul not miss the chance to continue to watch these videos. I'm enjoying my learning process, thank you both.
Thank you for making kind of knowledge available to everyone. This really makes a difference when your new and starting to put things together in your mind and breaking out doing tasks on your own in a production network.
Thank you very much for going at this level. You are helping a lot of people that just starting on the networking/ security side of computers. Please continue going deep with different types of protocols!
You guys are incredible! I've been looking for videos like this for a long time. Attaching the pcap file is a great idea so that person can follow along with your flow!
thx Mr. Bombal you said that u will bring Chris again, your a man of your word I asked u to bring Chris again and u did it thx guys both of you, and God bless u( make it monthly ) Big respect from Algiers
As a french student, I would like to thank you for providing me with a way to both improve my English listening skill and my general IT knowledge 😁 Keep it up!
THANK YOU! Finally what I've been seeing in tcp packets makes much more sense thanks to you guys. I do appreciate it, definitely love the deep dives keep it up!
I once was asked about the tcp flags during an interview which I couldn't quite answer, now I have learned about them :) Thanks for the great content!!
Great! It took me 3 months of attempts to set up my own firewall until I noticed TTL=1 set by my internet provider 20-25 years ago.... Also 3 months of tcpdump and heavy learning. And I never had a chance to go through ALL the headers/options (not mentioning more fancy stuff). Thanks for a really nice material (though sometimes it could be maybe a tiny bit shorter...)
This is Great!! I used to have my CCNA way back and was never taught in this deep about TCP/IP aside from SYN/ACK and Sliding window. along with Latency it really makes more sense how payload is transferred and the TCP issues that can some along with it.
I saw this video a few months ago and I struggle a lot to understand, after reading some material and practicing I watched the video again and I really understand more about TCP, definitely you need to spend time and be PATIENT when learning this topics, great video David and Chris!
I couldn't believe that I would watch 1hr video on 3-way handshake and claim it was fascinating!
Glad you enjoyed it! 😀
I'm a software developer with a little networking background. Today I've learnt a lot more networking knowledge than my 5 years at the university. What a brilliant video. Thank you very much.
sounds like you didn’t pay attention in university
@@saucegotti8538 not everyone could handle all knowledge (and remember them) from university until they get their hand dirty on real world, genius.
@@saucegotti8538😂
@@saucegotti8538 it depends on the university i thnk...my college sucked, had to learn almost 90% of the things i know now on my own
😅😅😅😅😂😂😂😂🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣
Madman
Found my weekend watching! Great stuff, loving the details on TCP.
Thanks Jeremy! Great to see you here again 😀
Jeremys IT lab sir 😍😍😍😍😍❤❤❤❤
The GOAT
Please add some topics :-dhcp/dns/arp
Jeremy IT Lab, Sir your lessons are gold
When you can listen to something like this as a podcast (not watching), while working on something else (I was tidying up), and can understand everything that was talked about then you know that the person talking not only knows what they are talking about, inside and out, but can also explain and teach it clearly. That was excellent 👌🏻
This is the greatest TCP/IP lesson I have ever watched. Thank you both, David and Chris! :)
I have to say WOW... the way you two work together is just tremendous. This is really easy to listen to and really conducive to learning.
I thought CCNA 200-301 had a lot of information about TCP ... Until I watched this video, thanks for a great video. Learned alot
It really shows how much Chris is more experienced with teaching. A great way of repeating the same thing in different ways until it makes sense. That's why I like your videos, guys. Overall very informative video, about Wireshark and TCP both.
I'm loving these interviews with David & Chris. Really is valuable. 2 networking pros having a talk like a teacher & student scenario for us beginners to understand better & making it more engaging. Thanks so much!
This is SUCH a GOOD explanation!! I can't believe it's free on TH-cam. Thanks a lot for this!
One full hour of knowledge, thank you Chris for giving a easy-to-follow introduction.
Can you create a playlist containing all videos with Chris? This was so invaluable and combined with reading TCP/IP Guide it all makes sense. Thanks all!
Here you go: th-cam.com/play/PLhfrWIlLOoKO8522T1OAhR5Bb2mD6Qy_l.html
@@davidbombal You’re the best :)
@@davidbombal You are the best, David!!!!!!
@James Great question! Appreciate you 🎊 And David wasted no time.
The playlist I didn’t know I needed today ❤️🙌🫶
This is so incredibly thorough. Great job!!
This is so well explained. I will use this video as a complement to the training I do internally to colleagues.
I'm somewhat THE tcp and Wireshark guy at work, and often gets technical questions / request to troubleshoot something, even protocols I never worked with. Here's some things I really liked in this video:
- When you mentionned to ''Please capture the TCP handshake''. You're so spot on ! It's just so critical to have
- In TCP Options, MSS is not negociated but announced. (so many times I had to tell people this)
- SACK has to be enabled and announced in both Syn and Syn Ack.
Here are some suggestions of topic you could discuss in the future:
- Same video with ICMP (explaining all the codes, etc)
- A bit more depth on MSS (MSS vs MTU and fragmentation issues....just had one yesterday! :) )
- Get some packet loss captures and demonstrate where is the packet loss (example: If you see original packet + retransmission you can assume the loss is after the capture point, etc, etc)
Great work !
I appreciate how David and Chris present the basics, while so much of the modern movement has forgotten these core elements.
you may say with confident most of people don't know this
I recently started my journey with wireshark indepth... came across this session and would like to thank you both for explaining tcp handshake with so ease and detailed !!
Been following Chris for long time and having watched his all TCP wireshark videos, it's glad to have you here digged deeper TCP again for us.
Thanks David and Chris.
Thank you and you're welcome!
Thanks Kapil! Great to meet you.
Just started studying for my eJPT and holy smokes did this video add value to what I've just learned.
Can't wait for more in depth!
-Great content professor David Bombal, and Chris Greer...!!!
-Always nice when we look at the essentials in depth again.
-TCP/IP, Three way handshake is the basis of almost all communication that we have in the network.
-Great, this conversation and remembering in depth what we studied with the view of colleagues....!!!
-Thanks for the knowledge teachers David Bombal, and Chris Greer...!!!
Man, the concept of "splitting the OSI model in half" to troubleshoot is such a good one, I've never thought of that
You are doing very great by providing free knowledge to everyone. And the content is also superb.
Thank you!
Thanks David, the networking world is better because of you. Thanks for mentoring millions of people.
Thank you Charles!
This was outstanding! Not only did it show me the true value of Wireshark, it taught me more about what is happening between the client and the server. Great work!
Unlike the John Hammond video, this content is extremely valuable. Chris is an expert in the networking/packet analysis field and did a beautiful job breaking down these concept so one learning Wireshark gets the most out of the data packets and software. You need to create a play list just with Chris, having all his topics under one place. This just might be the single best educational video on the 3 way handshake on TH-cam. I would like to see common problems/solutions that occur often in the real world where Chris would be called out for diagnosis.
I opened this video a couple of days ago and finally came to watch it over the weekend. Great video, awesome presenters!
Wow!! Fantastic stuff. Do you know, my life just flashed before my eyes.... A+, Network+, This video series, then CCNA!
i watched the video on pluralsight explaining the tcp, and i think this is the most simplified explanation, the questions from David make the difference. and expiations from Chris were great. thank you all.
Spot on, there is so much info to take in, will need a few repeats, but loved the indepth walkthrough, really helps to understand. Chris's enthusiam is brilliant, you kept the pace managable, like slowing to 10base from Chris's 1000base. lol thanks
Suggested topic: 1) hosting onion sites, darknet webservers. 2) tor relays and bridges, 3rd party server setup to contribute directly to tor with a fixed budget instead of donating money. 3) ethereum contracts, solidity patterns and confirming / checking release of funds
I'm studying for my CCNA and I need all the help and insight I can get for each of the layers of the OSI / TCP model. Learning about the handshake and the behind the scenes down into the raw numbers and why the packets are what they are and how each client frames up the numbers is great, so thank you! I'd love as much real life troubleshooting as I can get, down to why each possible problem might end up showing itself. It can be overwhelming for sure and just reading about it can be so dry it's hard to hold the knowledge but with video examples like this I believe it will help a lot.
as a dual CCIE i still find this very useful and informative. recommended it to everyone in my team.
i have to come back and watch this . nice Chris . practically explained
Simply 🙏🏻,Eagerly waiting for next video..Thanks Chris and david
Never seen someone dissect TCP handshake like this. Amazing!
Thanks for the video! In my professional life, one of the things that has really distinguished my more senior colleagues is their ability to understand TCP/UDP flows during troubleshooting. This video really helped me get an idea of what their brains may be thinking when we troubleshoot together! This is a video I'll watch multiple times.
I cannot believe that I watched the whole video without skipping! Superb explanation!
I took a course that walked me through tcp among other things, but i didnt understand the importance and utility of it till watching this video. I very much appreciate the knowledge. Thank you both for your generosity in sharing with us all.
Cris and David you are real educators and no starch material on this channel
👌
I'm mainly a developer with little to no network background. But this really helps. And i love the way you both interact with each other to make it even more understandable. Heck i really put out my notepad and wrote some of the things down to learn this properly. Thank you both very much.
same
Thank you! Thank you! Thank you, David and Chris! I'm currently taking a college TCP/IP course & I think I've learned more in the last hour than I have in the last month! Our textbook is the TCP/IP Illustrated (2012) & although I I'm blown away by the technical details, I barely understand any of it. I also spend an ungodly amount of time researching what's still relevant. I've used Wireshark many times, but this video helped me UNDERSTAND it. TCP/IP is a prerequisite for my future Firewalls/Network security, OS Security & Routers classes, so I'm grateful for these videos to help me learn such a daunting subject. Please keep this series going!
This is the most valuable video i have found on youtube or anywhere regarding packet sending. The only way it could be extended more is how the actual wire (or photo optic) is transferred from point to point. This video is priceless and belongs in Universities as a compulsory IT or Comp Sci must watch
The explanation for the sequence number (raw) was a life saver!
This really made my 1 hour journey back to home from office fun, thanks 🙏
Love the practicality side of this... Why are these numbers important, and how to use them to troubleshoot. How and Why!
Hearing a professional talking about this makes you excited to learn more.
many training institutes are not not teaching these underlying concepts. Great work and thank you...
This is fantastic content, hearing the real life context of this system TCP/IP and the deep dive into how it works is great!
I know this is a two month old video, but I just wanted to thank you and Chris for putting this information out there. I have learned a lot from watching Chris' Wireshark videos, but this has been very educational as to why I am seeing what I see in the captures. I am not a network engineer/admin, but I end up spending a lot of time at work having to analyze network traffic because the application I support for my company is very latency sensitive and videos like these help me speak a common language with network folks to help get to the root of a complications. Thanks again for this and I am eager to dive into more!
Absolutely love this content. Most content that are on the web that pertains to tcp are explained in a very complex way. I love how Chris makes this very dumb down for the average person looking to learn tcp.
Please continue this series as its very interesting and provides invaluable knowledge.
I try to explain the way my brain processes things - so I gotta keep it simple! :-)
1:47 troubleshooting starts from tcp
4:13 lets see three way handshake
7:11 the sequence number
10:10 Wireshark speak to us
26:18 the key to understand tcp
29:21 David summarizes
30:38 Chris method
34:50 options
37:00 flags
41:53 window
44:00 swimming pool
so simple, so clearly explained, yet so hard to digest... I guess I've found something I will enjoy grinding on! thank you!
Hey David,
This video was just awesome. I am currently studying medicine but I've always been interested in computers. Once I'm done with med school I'm going to start with a computer science course and your videos keep my interest ignited. Thanks a lot !
Very well spoken Chris. I know close to nothing and I was understanding what was going on!
This was a great overview of the TCP/IP part of a networking class I took in university. Well done!
David and Chris, this is fantastic. I have watched so many presenters to learn this stuff and Chris, you are amazing in the way you teach it!
about 5 minutes in and LOVE how he describes and teaches stuff.
thanks for your videos david! always a pleasure to expand my horizon with your content
The TCP RFC was published the year I graduated High School... Absolutely LOVE LOVE LOVE this video. I can't wait for more! I've been working in IT most of my adult life---and I need to take things to the next level..I might be 58--but I really feel I have a decade or more to contribute.
Are you worried that networking is rapidly moving towards the 'networking as a service' model in which indivdual network engineers will become far less required as the service providers will only keep a few high level engineers and use low skilled people to do what used to be network engineer tasks? I'm 10 years younger than you and worry a lot that 'traditional' network engineer jobs will run dry in 5 years or less?
@@dopiaza2006 to a degree, yes. The Network as a Service Model is already invading the small-medium sized business market, reducing the need for in-house network engineers or even consultants. However, where I see growth is in the wireless segment...that and in Security Ops.
This video should be watched at least three times to get every detail and explanion! Well done!!!! Gongrats!
Wow what an episode. I can’t think of a word to thank you both enough for the treasure you giving us.
Absolutely loved the video! I'm currently doing research on Multi-path TCP so its amazing to have better understanding of TCP! Thank you!
what a brilliant way to teach TCP.. i am at 32:46 but till now i can say that i have learnt a lot in this video about protocol working, sequence numbers, wireshark filter setup etc. etc. I really like combination of these two persons. A very impressive tech talk regarding networking protocol.. Great video.. #TCP/IPDeepDive
Enjoyed the deep dive. Came for the window, but watched the whole thing.
Just getting into networking and found this indepth video extremely interesting 😊
Absolutely amazing masterclass. Thank you Chris and David, superb material.
Juan.
Awesome, it is even more interesting when David fires up some questions to help us understand the concepts well. Chris really knows his stuffs
i would say it is little tricky to understand the things but they have explained most of the things super good . Thanks man ✨
Great to see a colabration video with 2 experts form the world of network.
Great video and great explanation by both parties, like all other commenters have mentioned is a really valuable discussion. From the window scaling factor provided by the server (512), I assumed that all packets sent from the client to the server and vice versa would stick to the window scaling size of 512. But from inspection in the provided pcap file, the client remained the window scaling size of 64 (as indicated in the options header of the client SYN packet) while the server continues to send packets with the scaling factor of 512. Hope this clarifies anyone's doubts on the window scaling size of both client and server. Both of you have been so resourceful I'm so happy for this series.
It's been a long time since i have seen such an instructive video on TCP....You guys rock !!! Crystal clear and straightforward !!! Brillliiannnt !
Thank you! Glad you enjoyed the video!
you never disappoint your students David neither with your tutorials nor with your guests .. Keep doing this awesome work _V_
2 of the best guys on the same channel. super
I used to whatch a lot of videos from both of them when I went back to school (at age 58!) .
1hr well spent. Thank you guys. Definitely need a series. Nailed the basics of TCP/IP. Thank you!
I decided to not watch this Video when i saw it's too lengthy , but today, due to some Un-stable situation in Africa , i got off from my Work, & Watched the Video , it really helped me
Thank you for letting me listen to your conversation! I have learned a lot. Great job.
Hi, David! To be honest i found your CHannel by chance, and i think i am lucky. David, i am just little modest simple man, but if you would read this i wish you and all your relatives Health and Wealth, you content is always helpful and usefull for me! Thank you, man!
Thank you Nikola!
Sir just bombard this type of Deep Dive. It is helping a lot.
Love and respect from India.🙌
// MENU //
00:00 ▶ Intro
01:32 ▶ The beginnings of TCP
03:57 ▶ Three way handshake
07:20 ▶ SYN meaning/explanation
08:50 ▶ Port numbers
09:58 ▶ What actually happens in the handshake
14:19 ▶ Common starting TTL values
15:04 ▶ Why we need SYN numbers
16:11 ▶ What actually happens in the handshake (cont'd)
19:00 ▶ Q&A (SYN,SYN-ACK,ACK - Sequence numbers - Increments - Tips)
33:01 ▶ History of TCP
34:44 ▶ TCP options
36:56 ▶ TCP flags
41:53 ▶ TCP Window - window size and scale
59:04 ▶ MSS (Maximum Segment Size)
59:49 ▶ SACK (Selective Acknowledgement)
01:00:13 ▶ Conclusion
// PCAP File //
Wireshark TCP pcap file: www.dropbox.com/s/l5p8ofik86zeieh/TCP-Handshake_ChrisGreer.zip?dl=0
// MY STUFF //
www.amazon.com/shop/davidbombal
// SOCIAL //
Discord: discord.com/invite/usKSyzb
Twitter: twitter.com/davidbombal
Instagram: instagram.com/davidbombal
LinkedIn: www.linkedin.com/in/davidbombal
Facebook: facebook.com/davidbombal.co
TikTok: tiktok.com/@davidbombal
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//CHRIS GREER //
LinkedIn: www.linkedin.com/in/cgreer/
TH-cam: th-cam.com/users/ChrisGreer
Twitter: twitter.com/packetpioneer
Pluralsight: TCP Analysis Course: davidbombal.wiki/tcpwireshark
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EXCELLENT
David, are you really ex NSA or is it a media stunt?
What software was used to capture this podcast/video? I know it's not Zoom, appears to be full HD or better quality.
@David Bombal Hello, We would like to listen about future of Data Sciencist ,plus their Job roles. Your Thoughts will be great to us who Interest and will invest their learning in this data scientist roles . Thanks since now on.
It's been amazing experience watching two of you explaining TCP basics in wonderful way.
Would like to see you both covering TLS as well. Fingers crossed 🤞
You guys are great, the nitty gritty of TCP just came out, we want more including UDP.
A lot of IT guys say you don't need college. This is the kind of stuff you learn in college. College does very much add to the richness of information used in all aspects of IT. I would just like to thank you so much for sharing, it was a wonderful recap.
You can learn this without college... Read more...
@@Phasma6969, I agree. Reading is essential.
@@lennyaltamura2009 We love to hear it. Wikipedia happens to actually have good information on IT topics that are purely engineering oriented like IEEE specifications and standards.
This was some of the best tcp/wireshark education i've seen where you simply things so it's understood. well done and thank you
10minutes into the video and there is alot of valuable info I already got.
wow! i wish UNIs had teachers explaining subjects like this! Thank you
Glad you enjoyed the video Pedro!
Found a little gem with this video and I've never seen such a breakdown. Wireshark seems so much simpler now. I'm looking forward to taking networking to the next level with you guys, thanks!
Wow, I’m 3 1/2 minutes in and this is already looking…
a. *Interesting* and
b. *Important* in terms of a troubleshooting approach. Good stuff!
Really happy to hear that! 😀
Thank you David and Chris for this fanstastic session. These sessions are really empowering and the in-depth knowledge that is imparted through this video is enlightening. I am truly grateful for this. Once again, thank you David and Chris.
I'm starting my studies in CCNA and I have been following you for a while, a lot of things I still don't understand but, I woul not miss the chance to continue to watch these videos. I'm enjoying my learning process, thank you both.
Thank you, Julio! I really appreciate that!
Thank you for making kind of knowledge available to everyone. This really makes a difference when your new and starting to put things together in your mind and breaking out doing tasks on your own in a production network.
Thank you very much for going at this level. You are helping a lot of people that just starting on the networking/ security side of computers. Please continue going deep with different types of protocols!
You guys are incredible! I've been looking for videos like this for a long time. Attaching the pcap file is a great idea so that person can follow along with your flow!
Brilliant video, thank you both.
I'd like a little more detail on how these window sizes work with MTU.
thx Mr. Bombal you said that u will bring Chris again, your a man of your word I asked u to bring Chris again and u did it thx guys both of you, and God bless u( make it monthly ) Big respect from Algiers
Thank you! Definitely going to be creating more content with Chris 😀
Thank you! The insight about sequence numbers surviving a NAT is an eye opener for me and surely will help it debug.
As a french student, I would like to thank you for providing me with a way to both improve my English listening skill and my general IT knowledge 😁 Keep it up!
THANK YOU! Finally what I've been seeing in tcp packets makes much more sense thanks to you guys. I do appreciate it, definitely love the deep dives keep it up!
I once was asked about the tcp flags during an interview which I couldn't quite answer, now I have learned about them :)
Thanks for the great content!!
Great! It took me 3 months of attempts to set up my own firewall until I noticed TTL=1 set by my internet provider 20-25 years ago.... Also 3 months of tcpdump and heavy learning. And I never had a chance to go through ALL the headers/options (not mentioning more fancy stuff). Thanks for a really nice material (though sometimes it could be maybe a tiny bit shorter...)
this is the most beautiful video i’ve ever run into on youtube. wow. thank you thank you thank you
This is Great!! I used to have my CCNA way back and was never taught in this deep about TCP/IP aside from SYN/ACK and Sliding window. along with Latency it really makes more sense how payload is transferred and the TCP issues that can some along with it.
I saw this video a few months ago and I struggle a lot to understand, after reading some material and practicing I watched the video again and I really understand more about TCP, definitely you need to spend time and be PATIENT when learning this topics, great video David and Chris!
One of the best videos about TCP on TH-cam. Can you please make another one, but this time about SCTP? I am very interested in it. 🙏