VLSM subnetting - CompTIA Network + Simulation Question & Solution

VLSM Subnetting stands for Variable Length Subnet Mask. In VLSM subnetting, we can get different sizes and different subnet masks for different networks. In other words, in VLSM subnetting, we can allocate a different minimum number of host IDs to meet each different network based on its size.
Subnetting is simple
• subnetting is simple
Class B ID subnetting
• Class B ID - Subnetting
Subnetting a subnet
• Subnetting a subnet -...
Subnetting Playlist - including all subnetting topics
• subnetting is simple
Subnetting
The question in the video is similar to one of the CompTIA Network+ simulation questions.
Corporate headquarters provided your office a portion of their class B subnet to use at a new office location. Allocate the minimum number of addresses (Using CIDR notation) needed to accommodate each department.
Range given: 172.30.232.0/24
HR 57 devices
Sales 100 devices
IT 12 devices
Finance 25 devices
After accommodating each department, identify the unused portion of the subnet by responding to the question on the graphic. All drop downs must be filled.

[@estebanchaves8865]

My man sunny, thank you for your videos. I've been studying cybersecurity for a while and your videos were helpful, I could get a job, keep it up man.

[@sunnyclassroom24]

Thanks a lot. I will upload more.

[@reconstructedrichard208]

thank you so much for making this dude! I'm taking my network+ exam tomorrow and pass or fail, you have certainly raised my odds of success

[@jorgemontero384]

You are helping me on studies for CCNA thank you so much Sunny, please continue uploading videos.

[@mrse7en196]

Big fan of your work, Sunny. Hope you guys are doing well in the christ of coronavirus

[@sunnyclassroom24]

thank you!

[@suzannebrandt1065]

Your jokes are funny lol keeps me engaged and paying attention. I use your sunny table for everything thank you 🙏

[@sunnyclassroom24]

Awesome! Thank you!

[@saeli.49]

Easy and simple to understand! Thank you very much for sharing your knowledge in such a didactic and pleasant way.

[@kalleshlavanya8570]

Sub-netting made very easy, Thanks for your efforts.

[@GiggleYohoo]

I kept in browsing to look for this chart on KZbin until I found this again in your channel and its magic. Your accent is funny but I love it seriously. Keep it up Mr Sunny. I Bookmarked it already and clicked subscribe. You're the man. Haha

[@sunnyclassroom24]

Welcome aboard!

[@dinorossi6611]

Your subnetting videos are the best. I think that Jacob Hess is using your technique which is great. Thank you Sunny. Sunny days are upon us.

[@sunnyclassroom24]

thank you for coming back!

[@forrbi5185]

Great video sunny, explained very well!

[@bstanis1237]

Great work CompTIA Network + . All the best for you Eng.Sunny.

[@sunnyclassroom24]

Thank you!

[@eduardusharditjiputra6506]

Your videos are amazing my guy, keep up the good work!

[@elvinguerrero2596]

Thank you very much Sunny your videos help me to get my Network+ certificate. You're the best !

[@sunnyclassroom24]

Thanks a lot!

[@saleemkhokhar3458]

I know I'm late but thank you!! this is easy all because of your style

[@juanacosta9055]

Thank you for your excellent work ! Wish I could buy you a beer for the clear explanation.

[@shanud07]

Thank you for your videos. It additional knowledge when im studying cybersecurity

[@erwinlorenzo238]

Thanks sunny for explaining it well!!! Keep going!!! More power!!!

[@sunnyclassroom24]

Thanks!

[@Richie3948]

Well explained - thanks!

[@chrysndedigwe2569]

Very easy by your method. Thanks

[@iamPhZ]

Thank you Sunny

[@xilioxilione1478]

Grande Sunny!!! Spiegazione perfetta. 😁👍

[@sunnyclassroom24]

Thank you ! 😁👍

[@balaganeshlakshmanan526]

Thank you...waiting for your next videos...

[@sunnyclassroom24]

All right. Many thanks.

[@RynAmelli84]

Wow this is much simpler. This should definitely assist me in my upcoming Net+ exam. I'm absolutely gonna use it. Thanks so much Sunny!

[@zero_day_xsploit]

your the best on youtube do security on udemy ill support ... after ur subnet video i can do it in my head .. incredible

[@sunnyclassroom24]

awesome. Cheers......

[@farshidkeshaninobari5336]

Dear Sunny thank you for your usefull tutorial, really simple and practical, thank you. I need to learn to how to calculate(find )network address and ANDing. Do you have any videos on these subjects?

[@kayalievleon12]

you are my hero !!!!!

[@badrhani6390]

Dear Sunny, thank you for your videos I have learned a lot of them. It would be nice if you could make an order of how to learn networking specially for beginners. Starting with a basic suite then for each subject a separate suite. thank you very much

[@luiscosme1154]

Thank you

[@hajarsalman35]

Hi Sunny I would like to thank you about the wonderfull explaination of subentting and I would like to ask about what does this question means "which of the following would represent the largest possible contiguous block of remaining addresses" because I didn't get it and how you solved it

[@surndrabudania1]

Great Job Sir!!! Huge fan. May you always be happy and keep spreading this knowledge. One suggestion Sir. Playlist can be better organized.

[@sunnyclassroom24]

Thank you!

[@NavidDariya]

Good job ... I like and suggest ur videos ...

[@sunnyclassroom24]

Thanks.

[@GDNetworkingNewbie]

Impressed by you, I also started, just a try by me.

[@sunnyclassroom24]

Thank you for watching! Check out my other videos please!

[@ryannmars4918]

Hi Sunny! I just watched this video and I have a question for the last part asking “Which of the following would represent the LARGEST possible contiguous block of the remaining address” You took the total USED and subtracted it from the total AVAILABLE leaving only the remaining amount of 16. But that isn’t contiguous is it? I thought the answer would be /25 for the Sales department because they needed 100 hosts and the that subnet allocated 128 hosts leaving 28 contiguous unused. What am I missing? Thank you!!

[@leeds85]

2:43 Do you have to commit to memory the sunny subnet table to answer these questions in the Network+ exam. Looking at exam rules it doesn't look like you are allowed to make notes or calculations other than writing materials provided. How does this work when taking the online test?

[@baldovincadenamejia244]

Hi Sunny great video as always! In the example we are told the network ID range is 172.30.232.0/24. You explained in this video that we use one subnetting table or the other depending on the subnet mask (e.g. /16 subnetting not the same as /24 subnetting). But how is it determined that a /24 mask is used for the network ID range? Why not 172.30.232.0/16 or 172.30.232.0/8? Also I was read in an article that, for subnetting, it is possible to borrow one bit from the network in case you need more subnets than the ones one can make with the given subnet. How is this done? Is there any limitation to this? Thank you in advance.

[@Vadinaka]

Hi Sunny, I am a retired ex pilot who is teaching himself IT. Your courses are a gift from heaven, however, I could use some help. If you were to start, in which order would you watch your videos? I would like to build a lab while securing my home network with IoT devices. Thanks and keep up the good work.

[@sunnyclassroom24]

Hey, Jean, Thanks a lot for your nice words and encouragement. I published my videos, not in any order. However, I have organized them by playlists. If you can click my playlists and choose one topic as the major theme. For example, the playlist " 1 OSI Model and related" is the foundation for all networking and cybersecurity. And then move to the second playlist: 2 Topology, cabling and cabling structure". At this point, I have not finished all the videos to cover all topics. Thank you very much for your support and interest.

[@jeanjeto1279]

Thank you

[@sunnyclassroom24]

@@jeanjeto1279 you are welcome!

[@seif-eddinesegueni548]

hey i have a question, they gave me this 172.19.160.0 /22 and I'm confuse which table i can use =,can someone help me please :/?

[@jerchinn]

I need to subnet with CIDR as /21 in AWS ? How to do that ? This table does not help me. Please advice.

[@Richie3948]

CIDR 21 subnet mask is 255.255.248.0.

[@robertgeorge5020]

hi sunny do you offer any private tutoring ?

[@sunnyclassroom24]

sorry. not right now.

[@anjilkhadka7387]

where can i get this CIDR notation Simulator

[@fercoshow]

So for Net+ exam do I need to memorize this table?

[@peonyma]

Miss Sunny video very much.

[@sunnyclassroom24]

thank you!

[@Mattkow1]

What if the company asks you to provide 512 devices?? Edit: found your class B subnetting video! Thanks Sunny!

[@sunnyclassroom24]

You are welcome!

[@BreakpointFun]

6:48 it connects 5 new devices to setup No more ip's What's the point use /24 for everything

[@90K1D]

You should allow translations.

[@sunnyclassroom24]

thanks a lot. I have no idea of this function. I might try it for fun.

[@muddasir313]

EXCELLENT.. VRY FRNDLY WAY F TCHING

[@somaliudiidaceeb2904]

Hello sunny i don't understand how u solved the question. I mean you have only 254 valid hosts. So u can use /26 which gives you 4 Subnetts each 62 valid hosts but Sales department wants 100 valid hosts??? How can u use /25, /26 , /27, /28??? You have only 254 valid hosts in this 172.30.232.0/24?? Is it like this A)/25 First sales Department gets 126 valid hosts. So i have only 126 halid hosts left how should i devide for 3 departments??

[@addanametocontinue]

That's the point of using VLSM (variable length subnetting mask). You don't divide the available hosts into equal parts. You assign only what is needed. See below for an example of how I assigned mine out: HR = 57 172.30.232.0/26 Sales = 100 172.30.232.64/25 IT = 12 172.30.232.128/28 Finance = 25 172.30.232.144/27

[@Richie3948]

@@addanametocontinue Absolutely!

[@nicole.9889]

Has anyone seen VLSN questions like this on the exam?