Free CCNA | Subnetting (Part 3 - VLSM) | Day 15 | CCNA 200-301 Complete Course
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- čas přidán 16. 06. 2024
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SUBNETTING PRACTICE:
subnettingpractice.com/
subnetting.org/
www.subnettingquestions.com/
This video, day 15 of my free CCNA complete course, continues our look into subnetting. You will subnet larger networks (Class A) and learn VLSM (Variable-Length Subnet Masks)
In this FREE and COMPLETE CCNA 200-301 course you will find lecture videos covering all topics in Cisco official exam topics list, end-of-video quizzes to test your knowledge, flashcards to review, and practice labs to get hands-on experience.
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0:00 Introduction
0:33 Things we'll cover
1:03 Day 14 Quiz 1 Answer
2:35 Day 14 Quiz 2 Answer
3:16 Day 14 Quiz 3 Answer
4:04 Day 14 Quiz 4 Answer
5:03 Day 14 Quiz 5 Answer
5:48 Subnetting Class A Networks
6:18 Practice Question 1
8:20 Practice Question 2
10:21 VLSM
12:17 VLSM Steps
12:56 Tokyo LAN A
15:18 Toronto LAN B
16:59 Toronto LAN A
18:20 Tokyo LAN B
19:59 Point-to-point connection
21:41 Additional Practice
#cisco #CCNA - Věda a technologie
ERRATA:
At 2:52, '/22' in the upper right corner should be '/20'.
At 5:38, the third octet is written as '00000000', so it should be '172.30.0.0', not '172.30.64.0'.
At 6:43, the slide title should be 'Subnetting Class A Networks'
At 18:56: I said 'Therefore, we must use /26'. It should be 'Therefore, we must use /28'. The info on the screen is correct!
Hi Jeremy, @6.59 shouldn't it be Subnetting Class A Networks instead of Class B?
Hello Jeremy, thank you for taken time to help us with your videos. However, my question is why didn’t you maintain the same value for n=10 when calculating the # of subnets?
@@owusubernard6441 because we don't have 10 bits available! its a /16 network and we have used 10 bits for the host and have 6 bits remaining that we can borrow for the subnets...
At 19:45 you say, "192.168.1.239 is the network address of Tokyo LAN B," but I think you meant broadcast address.
Pls pin this comment so its easier to see. THX so much for all,best series on CCNA!
for everyone who uses this course, please tip the publisher for the great effort he is making here
Thank you Saif, I really appreciate it!
Going through this whole course again to refresh my memory before I start studying for my ccnp, and I don't think any paid resource I've used to study has ever made things so clear and easy to grasp. Great work again Jeremy
Thanks, glad to hear that! :)
Apart from your fascinating teaching style and simplified explanations, you still devote time to respond timely to all posted questions. Other instructors on CZcams hardly do so. In fact, I can't think of any instructor that does that fully. This makes you stand tall in the midst of the crowd. Thanks for your great work!
Thank you! Happy to help :)
A big "Thank you" from Bangladesh... Tried to learn from own language trainer but failed to comprehend properly... Then found your resources on CZcams... Honestly you really made this ccna course quite easier to understand... I've never seen that much effort anyone else made, especially for free of cost.. You're a wonderful person...
I don't know about others but I feel much confident after watching the videos...
Someday I'll try to pay a contribution as a thank you.. Don't have anything at the moment.. Once again thank you... 😊
Thanks so much for your kind words :)
Thank you for the lessons Jeremy, you always made CCNA fun and easy to accomplish from your ICND lessons. Much appreciated for your time and devotion. Will definitely be making a donation to your hard work.✌
It is a great pleasure to see such personalities as Jeremy giving out, for free, their knowledge and expertise at such a level which requires so much work and time. Lots of thanks to you Jeremy for this wonderful job.
Your videos are keeping me invovled and motivated to get deeper into huge field of networking technologies. Thank you for additional practice links.
jeremy saves the day! thanks for the videos mate i was struggling with subnetting and your videos helped me out alot !!!
Finally I understood subnetting in this video..I understood class A subnetting very easily but I got confused with class b and a. I almost answered incorrectly all of the questions and lost confidence in myself. Then I tried really hard in this video. And I answered most of the questions correctly
in this series you proved to us there is still someone in this time that care about the full knowledge of teaching, the honesty and responsibility of teaching step by step bit by bit topic by topic for both theoretical and practical parts that make the students very aware about every single piece of information he need about the CCNA so that he finish your course with a confident in himself that he is ready for the exam i never seen a simplicity and beauty and honesty and responsibility of teaching like I saw in your course I have been in online courses a long time and I saw a lot of courses there an they always have weaknesses in some theoretical parts or practical parts what wasn't covered good or explained in a good way and that leaves the students confused and not confident of himself after finish these courses that they put a lot of time in it so I want to say thank you from deep of my heart for making us believe again in the free online courses and believe me your efforts will not go away you will be the leader example for all the networks engineers in a short time believe me and thank you so much
This course gives solid knowledge about CISCO-related topics, thank you for your work, Jeremy!
Thank you, Victor :)
Great work, after watching all 3 videos in the subnetting series I feel as if I have a very strong foundation. Thanks!
Thanks, glad to hear that :)
VLSM is terrifying, yet awesome.
Thank you again for doing these videos, they are so helpful. I thought I had a decent grip on subnetting before, but this has really got it ingrained in my head. Awesome stuff.
Thanks Sam!
You explained VSLM so well, I got it down in the first try. Thanks a lot Jeremey!
Where have YOU been my whole life!! I'm learning more from you than in college. I can't thank you enough for everything you've taught us ♥
Thank you :)
Great job Jeremy, keep up the good work.
Im passing my ccna exam this week .... this channel saved my life thank you very much //
This tutorial is easiest one for me to understand. Really really appreciate your work.
I have an interview next week where I may be a network engineer working with nuclear power plants. I haven't had to do subnetting in awhile and came back here for a quick refresher on the basics. As always, super useful videos.
How did your interview go? Am guessing it went well.
@@toniatfort56 It went well! I should have a follow up interview either this week or next.
@@Frissdas1207 congratulations 👏. I wish you the best in your follow-up interview.
These subnetting videos really helped me out. Great Content!
This is the first time that i am having fun subnetting. Thanks Jeremy
I never thought subnetting could be this simple, I used to struggle with this kind of questions on practices, but now I know all of them (or at least the 98%). Thank you for giving such a quality content for the community. Cheers from Costa Rica, and please, keep going with those incredible videos!
Great, I'm glad to hear that :)
I am very thankful to you for these 3 videos, in which you have clearly explained subnetting.
Thanks, I'm glad you liked them :)
I really appreciate you for making this video series. It has helped me a lot !
Thanks, glad it's helpful :)
Most efficient channel to learn netowrking. Thank you.
Day 15 was awesome! Thank you Jeremy!
This three part explanation is awesome. I have seen many other videos on subnetting, but not one is even near to the way you have explained it. Wow, finally now I know what the hell is subnetting, and how to plan it.
Thank you, glad to hear that :)
thank you for making CCNA courses!!!
i didn't understand subnetting at first, i spent about a week and a half on it trying to understand, and reviewing the past videos on subnetting. I now have a whole journal of subnetting practice lol!!!!! i finally got it down and realize its easy!!! thank you for your videos!!!! ON TO THE NEXT!!
Nice! It's easy when you understand it, but that can take some time!
Great Video! Really appreciate the efforts. I'm hoping to take my CCNA this fall.
You're changing lives 🔥🔥🔥🔥
Jeremy you are the best teacher, i love the way you explain the things, thank you 🙏
Thank you Akshay :)
This is really great 👌 thank you Jeremy for your best lecture ever on subnetting and other topics plus it is free. I am from Ethiopia and always appreciate your lecture series and recommend for anyone who wants to get cirtficate.
Thank you!
finally got the idea how to calculate, it's a really very easy way to do, thanks a lot.
Best videos to learn subnetting. Also confirmed by a friend of mine who already have the ccna!
Thank you! Glad to hear that :)
very very good. I'm more confident at subnetting now. thanks so much.
I paused at Tokyo LAN A and followed the instructions. I felt I had the concept and went through all the way to the P2P and felt pretty cheeky about it because I remembered from the 1st subnetting video about using /31 for P2P. I mean I got all the questions right and I think using /31 is technically correct in "the real world" so I still feel good about my progress. I will remember that for the test, Cisco wants me to use /30 when I need 2 addresses.
Thank you so much!! You are are great teacher! When can we expect more videos?
Thank u J for making subnetting videos easily understood..
Happy to help! :)
Just purchased on teachable. There's real value in the curriculum. I'd rather pay Jeremy for his content than Google for ads.
I followed your advice and practiced subnetting everyday for a week with the 3 websites you suggested, I now finally feel confident subnetting CIDR & VLSM networks with ease!
One or two questions of SubnettingPractice.com did mention wildcard masks though, which I assume we will learn in future videos.
Thanks for all these amazing Supplementary Materials!
Awesome! Subnetting is a tough topic for many people, so if you feel confident with it you're in a great position.
Yeah, wildcard masks will be mentioned later when I talk about dynamic routing protocols, so don't worry about those questions for now.
(super quick explanation: they are like 'reverse' subnet masks: all 0s become 1s, all 1s become 0s)
Hi Jeremy.. I should give you compliment that I can do this VLSM exercise before see your answer.. It is because explanation from your previous video is straight forward compact and structured. Thank you so much..
Nice, glad to hear it :)
really amazing explanation of the subnetting you made it very easy thank you so much my friend .
note :
to calculate the number of necessary bits to create 2000 subnets
we can use this formula :
2^n = 2000
so
n = log2(2000)
then
n = 10.96
this means that n = 11
we need 11 bits to create 2000 subnets
Greetings from Toronto :D, Thanks Jeremy, very nice videos!
I'm from Markham! Greetings from my current home in Japan ;)
great work sir, you are an excellent course teacher I have ever met, keep up the good work
Thank you, Omar!
The way you teach is soooooo fabulous. Makes me to get more interest into the subject. Single word thanks is not enough for your work. Anyway thanksssssssss......... ❤️
Thank you, I'm glad you like the course :)
Excellent course I really love it !
hello.
thanks again ,
always waiting the news from you .
have good day
thank you for the subnetting lecture really appreciate it
Thanks, glad you like it :)
what a great 3 videos I can finally say that I learned how to subnetting :)
Great work Jeremy!
Thanks a lot, Jeremy for these helpful materials
I'm glad they're helpful :)
Really your series are wonderful ... Thank you
Thank you :)
You're the man, Jeremy.
I have only one word: GENIOUS
@Jeremy's IT Lab Thanks for making these, you're a real life saver! Gotta ask though, does the CCNA give you some sort of scratch paper to use while you test?
great as always!
Hey if you want a quick way to get the subnet prefix length from your required number of hosts, try log2(256/x)+24 (or your class b or a prefix length) where x is the number of hosts needed.
Like Tokyo LAN B needs 64 hosts, so log2(256/64)+24 = /26
Really appreciate Jeremy's course, I promise this is the best IT course I met, let me an English poor gay can understand and complete the exam step by step.
at 19:36, VLSM, another solution is:
Tokyo A/25, x.x.x.0-127;
Tokyo B/28, x.x.x.128-143;
Toronto A/27, x.x.x.144-175;
Toronto B/26, x.x.x.176-239;
I just arrange the subnet by natural order, then get the same host portion as our teacher Jeremy did, but I don't know if it is appropriate for other situations.
really thank you for this efforts
Thanks! I appreciate the training program you've created.
Hey buddy, are you learning CCNA?
Thanks so much for the tip! Sorry for the late reply, just noticed this. I appreciate your support :)
@9:57
I do it by my self without calculator by duplicate (2) 21 time to get the hosts per subnet, since /32bit(IP address) - 11 =21 , then I was sad to got 2097152 ,but I figure out that I forget to subtract Broadcast and network address 🙃
I will never be able to do Subnetting with out your effort Jeremy
Thank's a lot ❤
Thank you once again Jeremy!
You are amazing ! , Excellent job !
Thanks J, I love the way you explain these so clearly. What if the require question is about the first/last valid host on the subnet?
I included some practice for that in these videos! First/last valid host if the first/last usable address.
Stay tuned for Jeremy's CCNP series in which he doesn't use voice synthesizer software.
CCNP will take years for him to make
Great job! Again!
Thank you!
you are the best!
You should make a course for CCNA or CCNP on Udemy or some other learning platform, after finishing this series. This tutorial is a good starting point. I think that you can earn and live from teaching. I will buy everything from you. 😃 Just look at comments, I didn't see one negative comment, that is great! :) Thank you, Jeremy!
Thanks for your support :) Top priority at the moment is finishing this course, but after I'm done I will consider releasing something on Udemy or another platform like Skillshare. I might go full-time teaching at some point, but for now I want to continue working and improving my skills as a network engineer!
Thanks for taking time on the answers of the quiz from the previous day! I was sure about them and turns out that I answered 4 wrong!!! hahahaha.
Its because I assumed that the borrowed 10 was for the second address, but its the third, so I answered the third network add and broadcast add!!
This course is really helping me to learn! Thanks!!!!
best teacher ever
Great class sir...!
Great work as usual Jeremy, quick question. For the CCNA exam are you only allowed to covert decimal to binary in your head or can you use other means such as pencil and paper?
Thank you for teaching this. I'm starting to get the hang of it.
1. /23
2. 172.21.96.0/20
3. 192.168.91.127/26
4. 172.16.64.0 /18
172.16.127.255/18
5. /22 = 64 Subnets
Well done!
You make a great work
Im very pleased with this video...I got everything correct.
Well done!
Thanks for making such a great video.
Thanks for watching and leaving a comment :)
Thank you for sharing your knowledge with us
Thank you for your comments :) My pleasure!
Great. THANKS! Very helpful!!!
I found your presentation of VLSM in the context of a concrete example clear and helpful. Thank you. In the example, if later a new LAN were added---say, Townsville LAN A with 6 hosts---is it possible to fit the new LAN into the existing VLSM structure, or must we reorder the LANs (from most hosts to fewest hosts) and re-subnet?
Thx Jeremy for the video
Ur THe Goat Dude
I'm so addicted to this!
Learning is a good addiction to have ;)
@@JeremysITLab your free course isn't just a content. The way you explain the detail and interact with audience show that you really wanna help and make sure those who watch your videos understand. Not only that, but also encourage them to become better each day. I don't have enough words to thank you for making these videos, You're inspiring! I hope there are more and more people inspired and can master CCNA.
Thank You Jeremy for spreading your kindness :)
💜🧡❤️💙THX! great as always!
Thanks Julian :)
Really thank you
wonderful mr Jeremy
Thank you Elmira!
Love and Respect
Thank you, same to you :)
You are great sir.
Thank you for this terrific series. The BEST! Something I am still hung up on. When you calculate hosts with multiple subnets, don't you have to take into account the network and broadcast address of each subnet which cannot be host addresses? I can see how if there was only 1 subnet, 2 to the power of host bits - 2 works if there is just one subnet but that formula doesn't make sense when there are multiple subnets like in question 5.
Things that concern me are for instance, calculating number of hosts when it becomes a very large number without a calculator as we would be expected to do for the exam.
Don't worry, you won't be asked to calculate anything like that in the exam.
@@JeremysITLab that's of great comfort to know thank you!
Sir hands down to your great teaching skills and thank you very much for making this free, especially for countries who can barely afford to get a paid lesson , but once i land a job i will for sure pay back, sir still i am lost with question number 5 , if you have more time to add another video which pays more attention to question number 5 we would really appreciate it. thank you so much sir! you are the best teacher.
update after rinse and repeat i got what question 5 is thank you very much sir.
thanks a lot bro very helpful
I love you Jeremy❤
Thanks Jeremy you are a great teacher! I'll take few days break and just practicing subnetting. Do you recommend any particular tricks/method for subnetting calculation ?
No tricks, just know the binary!
thanks very much for this great job
Glad you liked it!
Thanks J, Simplified
Thanks Glenn!
Superb! Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!Superb!
Hi Jeremy, I am just curious to know how you developed such a deep understanding of all these networking concepts. What is your strategy for learning new concepts and making it stick? I know the flashcards might play a part but I feel there is more. How did you get to the level where you can speak about these topics at a jedi level?
Honestly, on the scale of things I'm still far from a true expert! But I think trying to teach others has really helped me understand things more deeply. Formulating the concepts and presenting them in an understandable way requires you to understand it well yourself!
Just working in the field itself helps too, of course.