AWS VPC Basics - Understanding what is VPC and Calculating CIDR for VPC and Subnets

[@AWSwithChetan]

Hi All, those interested in understanding AWS Networking in depth may want to enroll AWS VPC and Networking course of mine at www.awswithchetan.com If you are a student, fill this short form and receive additional discount: forms.gle/z8mBsmdpDRN2FXe69 Thank you and see you there !

[@PhillipKerman]

Who doesn't love a great explanation of an less than intuitive subject? This is the best CIDR notation explanation I've ever heard. Plus the foundation AWS topics. Great teacher.

[@LuisGMarine]

The section alone on CIDR is worth its weight in gold, in my opinion. Fantastic video! Wishing you peace and safety.

[@dushyantchaudhry4654]

agree entirely.

[@jacobvandross3941]

i watched this twice before watching Stephane Maraak's Udemy videos on the same topic. You simplified it so well!!!

[@morgann4276]

Give this guy a medal.. his teaching skills are great!! Thank you very much man.. much respect💯🙌

[@AWSwithChetan]

Your appreciation is no less than that 😍.. Thank you !!

[@manjeetsinghsuhag]

best CIDR explanation - nostalgia and refreshing memories from college. Though it was not explained with such subtle modesty and to-the-point in the college.

[@Unknown-hq7fv]

Hi Chetan- just want you to know I passed the cloud practitioner exam just by following your videos and doing practice tests. Thank you so much for making it simple for yolks like me to understand. 🙏 I owe my Certification to you.

[@AWSwithChetan]

Heartiest Congratulations and well done. Thats my ROI 😇. I am humbled to get such nice gesture from you 😊 Keep going .. n I will too

[@shashikanthd4767]

Like, subscribed, and sharing it whenever anyone asks me this topic i am gonna search this video and send them !!! Respect +1 brother

[@manikyaveenabeeram7552]

this video needs much more publicity..so underrated..

[@g-jalil6961]

Chetan never stop tutoring! You have talent. Really. Your videos are the most clear and helpful so far. Very well done!

[@karthigabalamurugan5568]

I have an interview tomorrow and i wanted to brush up the VPC basics and CIDR basics. I found this tutorial and you explained so well. Thank you so much for this video.

[@AWSwithChetan]

Wish you best luck for your interview. There is another video on aws networking overview which might be useful to get birds eye view on aws network services. Thanks for appreciating our work.

[@vigyanhoon]

The way you have specified CIDR, even AWS couldn't do that. Congrats on that!

[@srinadhp]

To the point, Practical and wholesome! Your presentation skills are the BEST! Thank you so much for clearing out so many doubts with your clear diagrams.

[@venuinbox]

Excellent content . For me cse/ and 15 years in it now moving to cloud DevOps this channel is a trusted source to recap essential knowledge . Many thanks to contributors of the channel .

[@ambarishanand6872]

Cleared my cloud practitioner by following your videos. Next going in for AWS solution architect associate and I hang on to your contents. You are simply gifted. Very rare to have people with such exemplary skills to teach anything with such ease. Thank you

[@morgann4276]

Hi, Congrats on clearing cloud practitioner. I want to clear it too. How much time did you prepare for this exam ?

[@varshapriyamageshbabu3971]

Yes even I was thinking that this person is just classic.A God in sense to clear the concepts...Thanks.

[@shamrozanjum]

I have watched several videos before this one and did not really understand. However, this video has helped me to learn how CIDR calculations work. Thank you

[@gourbhoi722]

This man is a gold

[@shashikanthd4767]

I saw this video and came down comment the exact same Just to find out you have already commented that

[@dasrakhadka9135]

bought his course in udemy after this video and the course worth all the money you gonna spend. Thank you

[@ssmile8004]

Excellent explanation..after seeing this I bought your course in udemy...by creating this kind of content you are contributing your share of support to mother universe

[@SherrylnSim]

Very helpful in explaining CIDR notation to a beginner, thank you very much!!

[@MyGrahan]

Initially, I was very confused that is this video worth it? so I skipped some of the content but when the video went by I was amazed by the content and again I went back and played and watched thoroughly. Well done it's really good and I finally understood the context of CIDR. Thank you so much

[@AWSwithChetan]

:) glad to know !

[@amixpal]

This is the most underrated tutorial on subnet

[@martinsmugambi4872]

Awesome. One of the best explanations on CIDR blocks that I have heard.

[@serhatbalk5202]

I am amazed how great you explain one of the confusing subjects (CIDR) of IT.

[@VedPrakash-ew1gw]

The best one to understand CIDR, Really appreciate your explaination

[@nilprofessional]

Amazon S3 bucket names are globally unique, this is regardless of the AWS Region in which you create the bucket. great video.

[@micheleruggieri5833]

Finally a clear explanation after watching many videos. Thanks!!

[@hykemoore]

Thank you for breaking this down so much. It makes the concept so easy to understand

[@faisalraj6654]

Thanks a bunch for explaining ciders, easiest as possible. Please make more AWS vids like these..

[@rchukkapalli1]

CIDR explanation is gold.

[@shashikanthd4767]

This is gold. Trust me this is the most simple and most detailed video i have ever seen on CIDR blocks Very kind request, if you could make a video on why this CIDR started i have heard there was shortage of ip addresses etc please could you make video sometime

[@avanishgupta9184]

I liked the way Chetan started with explanation of traditional concept and then moved onto cloud concept. This makes it easy(ier) to understand. A feedback: Go slow. Instructors should not hurry up in explanation and not assume students know everything. It is always, always better to cover even the most basic information before moving onto complex one. If someone knows a topic they can easily forward the video. Bought the class from udemy also.

[@AWSwithChetan]

Thanks Avinash for the feedback. I will try to incorporate your feedback in the upcoming videos. Thanks again!

[@MHX11]

Very easy to understand and cool visuals! Thanks

[@guptapesh]

Best explanation available on net. Good work buddy.

[@ayeayethinn2018]

Thank a lot for the best clear explanation and presentation. Please keep on sharing.

[@NitinKumar-dp4mm]

I started studying 1 week back...and I wish I had studied this as my 1st class...EXCELLENT EXCELLENT EXCELLENT

[@AWSwithChetan]

Thanks Nitin. Do watch “Introduction to AWS services” video if not watched already.

[@solomonrajkumar5537]

it's really Excellently explain Mr. Chetan!!! hats off... mind blowing explanation... I was really stuck in this concept for many years with respect to CIDR... now I am 100% clear... thanks so much!!!

[@atifsid_melb]

Mate, you are legend! Make things so simple..👍🏼

[@ashishmane7271]

Super cool..the best explanation ever so basic and building blocks..Many thanks!!!

[@gangadhar111]

Wow..Excellent..The way you started from tradtional to cloud was really good to get a clear understanding. Keep up your good work and thanks a bunch...

[@devjeetbasumatary8783]

Best explanation I ever had. Good job.👍

[@vkg.codefactory]

Excellent Video, I always have confusions understanding CIDR but you made it simple for me, thank you for this video, its very cool !!!

[@JBinthecloud]

GOD bless you for this explanation!!

[@seacprogrammer8455]

Beautiful explanation of CIDR notation THANK YOU !

[@mitsudipta]

By far the best explanation , each video is super simple and concise

[@AWSwithChetan]

Thanks Sudipta !

[@biaspind]

Simple and easy to understand Good Effort !!

[@akashmurali3019]

Thank you for the vpc explaination under the concept clearly ♥️♥️

[@hiteshsuthar5810]

This is one of best ever ❤

[@shrasai]

feeling blessed to watch this video. Thnaks a lot

[@mohamedyoussef8835]

Awesome Tutorial ++++ best I've seen 🙂Thank you

[@saifali7080]

Thank you brother, your content made my concept of ipv4 clear

[@AWSwithChetan]

Thank you!

[@dvprao]

Hi Chetan. I bought your course on Udemy. Your intro lecture was very informative. Gives a good birds-eye view of the picture. Best Wishes

[@Chillos100]

Wow Simply amazing!! The best on the net! Thanks a lot

[@biswajitnayaak]

why the hell youtube suggest your videos after i spend 100 bucks on some useless course in udemy. great explanation.Thanks a bunch.

[@anubhavsrinivas9926]

I went to class, but I didnt understand. I tried seeing lot of videos. but its always confusing. your's is the first video in which I understood completely. its nice you started by saying about class based and claseless, hence the difference between normal network and cloud. I hope all these IP we work on is part of amazon's private IP pool right ? so each IP in any AWS acc will be different uniquely?

[@deepamdembla8689]

excellent explanation of VPC and CIDR blocks.

[@yousuffarooq8109]

Great explanation on CIDRs. Keep it up!

[@kalyancreations990]

awesome sir . you clear all my confusions thank you sir

[@amitkumarpandey6099]

damn that made my concepts absolutely clear about the cidr much thanks!!

[@TheZikori]

You made it so easy to understand! thank you

[@1BAmir]

Thank you so much, you explained it very well! Thank you for you time and effort , it helped me a lot.

[@Johnsondsouza1987]

finally understood calculation of subnets and allocation of ip addresses :)

[@edwardunukpo4939]

Great work and explanation. Only got confused towards the end with the smaller subnet but I will review that. Thanks

[@shamlisarode9701]

same. Did you get chance to review it ?

[@moiseserrano]

❤ terrific, great explanation, I finally understood, thanks a lot colleague, subscribing to your Channel right now

[@NewJohnRefuse]

Now with CIDR it’s 5 bits reserved to Aws

[@sunnyisonvacation]

Thanks . Now i would be able relate these notations everytime it appears in aws console.

[@Tushartech91]

Very nice exaplanation!! you did very good job buddy!!

[@shamlisarode9701]

Thank you for sharing your knowledge with such an easy explanation. I just have doubts on the last part of smaller subnets of 16.Is the starting IP correct as you had prefix as 28 ?

[@disableblue883]

Yes, its correct

[@MrCaptainJeeves]

excellent video!! Very well explained. Kudos

[@RRc29]

you are a great teacher

[@cocoarecords]

best video on youtube

[@eben4star]

You're amazing man!

[@shanebagel]

Amazing subnetting!

[@guharajdeep]

What a brilliant tutorial...

[@newuntidy]

In last ex. we block 28 bits then we have 4 bits left - 2^(4-1) - 15 - so the max is 15 host in 1 subnet. So you wrote 16, 17, 18 which is more than 4 bits I guess. So even in the 2nd subnet it should be 10.100.1.0 till 10.100.1.1 Please correct me if am wrong

[@dbk9555]

Nice👍purchased course

[@taruniverma7069]

superb video..Thank you so much ..

[@Cybernetblog]

Damn man... you explain the CIDR like you created the math

[@TheTony3922]

Excellent explanation!! Thanks

[@juanm1391]

The best tutorial!

[@dushyantchaudhry4654]

Excellent video

[@adsmarteducation2166]

Very well explained. Thanks

[@deepsbglr]

Amazing. It is one of the best videos that I have ever come across over the internet for CIDR block. I have subscribed to your channel. Do you have such courses on AWS for other components? Kindly share the platform, I will join.

[@AWSwithChetan]

Thanks Deepak. As of now I just have AWS VPC/Networking course on Udemy.

[@Lskm99]

Great content, keep it up!

[@mydivinelife4774]

Great videos guys, keep up good job.

[@VedPrakash-ew1gw]

Have one doubt - Last digit of each subnet IPs should start from 0 to 15 in 10.100.0.0/28 CIDR . Why second subnet last digit started from .16 onwards at 29.36 video's ??

[@AWSwithChetan]

No Ved, it shouldn’t start from 0. Idea is to just divide complete address space into smaller address spaces. So for /28 prefix if you always start with 0 and end at 15 then you are wasting rest of 15-255 IPs. I would recommend rather look at it as normal incremental numbers just that they are represented differently. So blocks of /28 prefix will be like 0-15, 16-31, 32-47, 48-63 likewise. Blocks of /27 will be like 0-31, 32-63 etc. Blocks of /24 will be like 0-255 and then you have to increment 3rd octate value e.g 1.0 to 1.255, 2.0 to 2.255

[@VedPrakash-ew1gw]

@@AWSwithChetan Thanks for your nice explanation once again 👍👍 .

[@baksharp]

Awesome Dude!, You rock!, thanks.

[@jbozugu]

Clearly explained... Thanks

[@Stanlysam1]

Best CIDR video on youtube, thank you #Davestan7

[@ransombushu3553]

great explanation

[@rahuldwivedi4509]

Excellent experience

[@nitinkulkarni7942]

These examples make sense, but these are easier versions because the numbers you have chosen are multiples of 8. Can you provide an example like say VPC CIDR is 10.100.0.0/20 and I want to create 100 IPs in each subnets. How will I calculate the subnet ranges. Appreciate if you can

[@AWSwithChetan]

Some how my earlier reply got vanished. Hence posting again. Thanks for asking this question. I was expecting this from someone :) So, in this case the same logic applies but you need to make some more 2^ calculations 1. As VPC CIDR is 10.100.0.0/20, hence we can have total 2^12 = 4096 addresses in the VPC (ignoring the reserved IPs). So the first address in the VPC will be 10.100.0.0/20 and the last address will be 10.100.15.255 2. Now if you want to create subnet of size 100, you should look for nearest 2^ number which is 128 in this case (2^7). This means you need to create the CIDR with prefix 32 - 7 = 25. Hence the first subnet CIDR will be 10.100.0.0/25 3. The starting address of this subnet will be 10.100.0.0 and last address will be 10.100.0.127 4. The next subnet CIDR will be 10.100.0.128/25 (10.100.0.128 - 10.100.0.255) 5. Likewise you can create total 32 such subnets having size 128 each = 32 x 128 = 4096 You can use some online tools like mxtoolbox for quick calculations Hope this helps!

[@nitinkulkarni7942]

@@AWSwithChetan Thank you so much. This was super.

[@payamysf]

Awesome, Thank you!

[@dharma01v]

Thank You - this was great!

[@Manolete919]

very well explained!!

[@sandeepreddy4815]

good one....enrolled your course in udemy as well!!

[@saikarthik5032]

Excellent sir!!!

[@SHAMSAB]

nice video with useful content.what painting app you using ? r u using mouse to draw ?

[@AWSwithChetan]

Hi, I am using XP pen tab. So essentially you use it as a pen on non display tab like surface and drawing appears on the screen on laptop.

[@KAPOORHIM]

good high level description!