IP Addresses and Subnetting

#ccna #LazDiazCerts #cisco #ccnp #career #jobs #linux #networkengineer #cybersecurity #networking #network+ #programming #python #certifications #mikrotik #ansible #firewalls #IS-IS #json #pfSense #azure #aws #cloudcomputing #sd-wan #sd-fabric #agmp #bgp #redhat
WOW! ....I look so young!!!
This is an introduction to IPv4 addressing and Subnetting. But the same method can be used for IPv6.
(Please excuse the quality of this video...it is very old and it was one of my very first videos when I started on KZbin...this video started out to be a JOKE...and it eventually became a hit...who knew?)
For those of you that are looking for a more complete understanding of IPv4, HEX Conversions, Vlans, Routers & other courses related to Cisco and/or the CCNA certification, I'm happy to announce that I now have full courses available at the www.GlobED.net website.
Also, for those wondering why I start by 2...I have a YT video called "Counting by 2 and double as you go" that will clarify the method to my madness ;)
LIKE, SHARE & SUBSCRIBE to support this channel
IF YOU WANT TO WATCH THIS VIDEO WITHOUT ADS, GO TO LBRY.tv and search for my channel handle @GlobED or just click on the following link: bit.ly/LBRYglobED
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[@MrYash8123]

thank you vin diesel

[@awartllc]

vin gasoline

[@charmaineberry7701]

Yash Yadav 😂😂😂😂😂😂😂

[@PickoWebba]

more like Jonathan Banks

[@weeblbob233]

dude, he is the Rock of IT

[@MuminurRahman]

This guy is awesome. I learnt many things from his courses.

[@andrewclark3325]

10 years ago this video has been released. And it still rocks! Best explanation I have ever heard!

[@tkfritz5790]

Most teachers on this subject look frustrated or confused. This man seems angry about it but it somehow really helps absorb the information. I have watched my college professors video on this, another random guy, and this one. (all 3 were around 45min) and this is BY FAR the best video on the subject. Thank you very much.

[@thenetworkingdoctors]

I'm not angry...I just like to speak loud & clear. I believe it helps absorb the information and you won't fall asleep :)

[@khai4222]

@@thenetworkingdoctors it works

[@Mtz2604]

@@thenetworkingdoctors I'm a loud person too and people think that I'm mad or discussing with others or that I'm bossy, nope. I'm just loud.

[@TheDirector_]

😂😂

[@megwaschinyere4951]

@@Mtz2604 i understand that kind of tonne and its needed in learning

[@abdullahgumel3936]

Came for subnetting left with gains

[@Theorak]

44 minutes here are worth more than 90 in my class, thank you!

[@thenetworkingdoctors]

Theorak thanks!...glad it shed some light on this subject :)

[@noebryce3386]

Not sure if you guys gives a shit but if you are bored like me atm you can watch all the latest movies and series on instaflixxer. Been watching with my gf for the last few days xD

[@harleycreed4107]

@Noe Bryce definitely, I have been watching on instaflixxer for since november myself =)

[@christopherbrennan5287]

@Noe Bryce yup, I've been watching on instaflixxer for years myself :D

[@Tetrahcodom]

Just want to say 6 years later, and needing a refresh on subnetting. This was the best video I have watched. Honestly, your louder tone kept me engaged and paying attention. Thank you.

[@thenetworkingdoctors]

Glad to be of help!

[@alexsambou7481]

i was here in 2013 as a student and now i am back here looking for this video for my juniors as a network engineer.... Kudos to you sir

[@andrewaloung488]

My first time watching a video of 43 minutes without skipping.

[@thenetworkingdoctors]

LOVE IS IN THE AIR! and I am celebrating Valentine's day by giving 80-85% discounts for ALL my UDEMY courses. Use coupon code: VALENTINE until February 14th @ www.udemy.com/u/infothenetworkingdoctorscom - Coupons are limited....so let's spread the LOVE :) - Laz

[@_zEuS0390_]

It feels like I'm studying a military strategy and tactics, but this is absolutely helpul. Thank you Sir!

[@Smeak686]

I must say I appreciate the format of your videos more than a lot of the others that I have seen on KZbin and other sites. Your methods are especially easy to understand for someone like myself that has knowledge of these topics, but has not used them in practice for a long time. I am sure your videos will ensure that I pass my CCNA cert the first time around. Thank you for doing what you do!

[@jackbartlett1667]

The first 20 minutes is more helpful then the half years worth of networking lectures I've attended. There are some things you just cannot learn from PowerPoint slides! Thanks a bunch! Very informative and to-the-point.

[@jordand431]

Went through the Cisco Curriculum during school and this tutorial taught me much more than I learned doing that!! Thank you!

[@herrh1809]

super many thanks i was struggling to undertand CIDR, networking and subnetting, but your video as made it more clearer. i will end up watching more of your videos in the future. which will hopefully assist & help me with my coursework and career in IT

[@kouroshjam5878]

This subject was very complicated for me but your way was a solution for me. I appreciate your help. Thank you so much.

[@corbettjs]

This video was extremely helpful!! I have a non-technical background and have embarked upon a late life career change. You are the best!

[@thenetworkingdoctors]

Thanks Forensic Kitty! ...age is never the problem, it's your state of mind ;)

[@thenetworkingdoctors]

@jasmit kaur sahi ...when you count for subnets or hosts, you start by counting from 2 and double as you go (i.e.: 2,4,8,16,32,64....etc.). Also, when you count for subnets you count from Left to Right. When you count for hosts, you count from Right to Left. So, you always subtract 2 from the HOST side and you only subtract 2 from the NETWORK side if you are NOT using the Zero subnet. In my examples, the only time, I count by 1 and double as I go (i.e.: 1,2,4,8,16,32,64128) is when I count the BIT values in each OCTET. I do have a YT video called "Starting at 2 & Double As You Go"...this might clarify the method to my madness.

[@shaistakhan2761]

its rely helpful for me thank you sir

[@420techdeckpro]

The Networking Doctors You're awesome man, thanks for the help! :-)

[@JtheRipperPUA]

+The Networking Doctors I've been out of the IT game for a few years, and even when I did work with submasks, I didn't have to do much unless it was giving a machine a static IP. Aside from that, all the networks were already built before I started working at my job, so all these lessons never really came up. Im looking to get back into the IT industry, and wanted to brush up on my facts. I had no idea that creating subnets like this had so many facets. I admit, I had to watch this video at least 5 times in a row, pausing, taking notes, copying his diagrams....I figured out on my own about counting by doubling each number in the sequence beginning by 2 for subnets (left to right) and same but except right to left for the hosts; but I admit it took several times of me wondering why the hell he didn't start with 1. It all makes sense now, reading these comments its funny how many people it threw off about why he began by 1 and then by 2; I finally understand sub networking now, and this video is the best i have seen on youtube. Just a suggestion +The Networking Doctors but since this is the most popular youtube video on the subject and getting close to 1 Million views, I think it would be helpful to make annotations (like scrolling text perhaps, pop up windows?) explaining why a you switch from starting at 1's and then switching to 2's. The Bit Sequence vs. The subnet/host (2's) sequence. If you just added that little note in the video itself each time you do that then it would really be a perfect video. Just a thought, but love your teaching style. You sound hard and strict in a way, like a military person really taking us all on a sub netting bootcamp. Your demeanor really gives us incentive to get this down and push us to think hard and logically. This has helped tremendously, please continue putting video's like this on youtube!

[@thenetworkingdoctors]

Thanks everyone! ...and Jared Sanchez, I'm glad you got it! I do have another YT video called "Counting by 2 and Double as you go" that explains why it's done in this manner. Also, in the next few weeks, I'll be making a similar video since this one is over 3 years. However, it is the most popular video that I have. This video started out as a sort of joke for KZbin and it turned out to be the one that launched my online career as a Cisco Instructor...who would of thought? 😉

[@zanzishion1465]

Can I add you on facebook or email? you make it wayyy too simple- shion cal zanzi is my fb name aweeesome!!

[@dimitridragunov8463]

Good morning, Mr. yesterday night in My Council What I subscribed to your VIDEONET I tell you, you have helped me a lot , Through your courses I know what we call the class of address , home address, hosts, Subnets broadcast address, bytes , and masks , all my félicitations.Que God gives you intelligence and wisdom to help us

[@ronyesek339]

This was great. He reminds me of the first CCIE engineer I studied under. Very no nonsense and to the point. Great job!

[@garyoverload3947]

You have a gift to teach. I love how you change your tone of voice to get points across and it's really helping me in my Networking class. Thank you!!!!

[@raphaeldenman1188]

You, my friend, are f*cking GOLD. Well done, I've never heard a better in-depth explanation of these concepts.

[@MrJulioamaral]

At last I got to understand subnetting. Hats off to you my friend!

[@tvalchev]

Laz, thank you for putting this together. The video is easy to comprehend and follow. I will watch it couple more times to take notes and practice along this time. You work is appreciated!

[@abrahamturell1382]

Laz, thanks for your "down-to-earth" teaching methods, helps us (regular people) understand this so much better.

[@tsweat357]

Just found you on youtube and your a Godsend. Thank you much and i'll keep watching...

[@thenetworkingdoctors]

Glad I was able to help Timothy!

[@jamesw6529]

Doc, you have an awesome teaching technique. Your video has helped me loads. Keep up the good work.

[@thenetworkingdoctors]

Awesome James...glad I was able to help ;)

[@BILLKUBA]

Hey Laz, I have watched this again as many times before!, I truly love this tutorial because it's the best subnetting video on the net in my opinion. I want to say that this video helped me sooo much as I had a penny drop moment after watching this vid... I'm somewhat a subnetting master now because of you! I watch this video on different occasions because it brings back memories of how useful it was to me when I struggled with IP addressing. Laz you have my vote and respect always you are truly the king of IP.

[@turtlesteed9290]

Thank You! This has been the best explanation of calculating sub-nets that I can find. Please keep sharing your knowledge.

[@jessesanchez5294]

amazing video! I saw videos from livelessons and cbt nuggets and they were missing some stuff. Your stuff is on point to make sure we know how to do everything w/ out any BS.

[@thenetworkingdoctors]

Thanks Jesse!

[@MetaphoricMinds]

"...the CIDR has nothing to do with the class of address." Thank you!!! This has been throwing me for a loop for a while.

[@thenetworkingdoctors]

Glad it helped Brandon!

[@onemoresmartone]

Classless.

[@jameshabowick2825]

I love this guy and his t-shirt. The Network Doctor got me through my CCNA 1- 4 courses. I now have my Associates and working on my Bachelor's Degree in Cyber Security... Thank You!!!!

[@airisbyrock]

First time I watched this was 2013. When I'm looking for a refresher for IP Address and Subnetting its 2021 and still the one I'm looking for.Superb content.

[@nemanjacimbaljevic6681]

Just "stumbled" on this one. Great teaching style. I thank you!

[@thenetworkingdoctors]

Thank you Nemanja!

[@kingblazebeats]

This video really helped me. Taught me everything I needed to know about calculating IP and subnets

[@thenetworkingdoctors]

Thanks Sean!

[@MrTechuguy]

This guy is awesome! Explained this so simply and easily like nobody else could. Thanks to him, I'll be passing this part of my CCNA Exam. \m/

[@travismcclendon7610]

Your video was very good. I'm enrolled in an IT support specialist certificate course and I think your videos can really help me succeed. Thank You very much.

[@fridakalota370]

omg it took me 43 minutes to understand what i didn't in 3 phases of cisco...thank u

[@adaobiblaise8776]

I know some network teachers and Cisco teachers make it so complicated. You helped me understand what I didn’t learn in networking class and the Cisco classes made so hard to catch on.

[@thenetworkingdoctors]

@Kickass7895 ...you are not alone! this confuses many people and that's precisely why I made a video explaining this. There is a method to my madness 😎 it's explained in the video titled "Starting at 2 & Double as You Go!" ...I hope it helps.

[@pineappleunicorn7537]

I was struggling with subnetting and my girlfriend found this video amongst others explaining subnetting and showed me all of them. This one however, definitely helped it click with me so you now have a new subscriber.

[@deusmat6949]

Thank you, Laz! I'm actually trying to get my NET+ before I start my Cisco journey, and this is by far the easiest method for subnetting I've seen! Also, I love your book, "The Only IP Book You Will Ever Need"! Thanks again!!!!!!

[@thenetworkingdoctors]

Thanks justMATokay! .

[@WillyKillya]

very thorough and understandable, thank you sir

[@thenetworkingdoctors]

Thank you William!

[@dinho2143]

6:55 2012:Bless you 2020:is that corona?

[@thenetworkingdoctors]

🤣🤣🤣

[@maverick19702000]

Love the direct approach, delivery, and down to earth attitude. Takes the the "geek" out of this field. Thank You!

[@kevinquiambao5706]

Great work Laz! I'm from the Philippines and I must say, every tutorial that I watched so far are so clear, informative and concise! I really like how you repeat important information, over and over again! Hours of reading are getting clearer because of your tutorials! Thank you for all your effort! Salamat! Mabuhay ka! (Thank you! Long live!)

[@Alex-fv4bd]

So helpful, took notes on paper as if I was in his class. Would love to of had a teacher as exciting at him.

[@thenetworkingdoctors]

Thanks Adam!

[@Alhazarad]

@@thenetworkingdoctors or Alex

[@chanjc3921]

amazing teaching tutorial,Dr.

[@thenetworkingdoctors]

Thanks Chan!

[@DaniellebrownPhotography]

Great great video. I have watched a number of subnetting and IP addressing videos and this is one of the best. Thanks so much for posting.

[@thenetworkingdoctors]

Thanks for your support! I'm glad I was able to help 😉

[@joshfuller5076]

Thank you for this video. It helped me pass my Network+. 823 out of 900. This is the best IPv4 subnetting instruction I've run across. Thanks again.

[@slotlinekona]

hey, thank you for the straight forward subnetting explaination!!!

[@thenetworkingdoctors]

You are welcome!

[@rudeboysosh]

why is he mad at me?

[@Segovaxxx]

now i cant watch without laughing thx dude

[@thenetworkingdoctors]

I'm not mad...I just want to make sure that you understand what I'm explaining.

[@Cosme422]

rudeboysosh Agressive teaching LOL!!!

[@D4LM4R]

Because some of us (like me) understand and get it when they get yell at.

[@pinto126]

because when he puts u in a room with switches and routers if u cant do then see ya!!

[@dumdum1182]

Thank you for creating this great tutorial! Honestly speaking, I wish we had a professor like you in our university! Everything was taught in detail! :) So great!

[@lewisblack8876]

Helping me all the way over in Scotland before my test on Wednesday for some recap; helped me more than the slideshows that I ever got did! Thanks so much.

[@anthonyrodriguez5433]

Thanks Pitbull, really appreciate it, especially since I have my final exam on the CCNA R&S course having to do with switching and routing next week!!

[@thenetworkingdoctors]

Love those dogs 🐕...let me know when you pass!

[@yellowkll2853]

@@thenetworkingdoctors he didn't pass [*]

[@defaultgamer34857]

@@yellowkll2853 how do you know?

[@yellowkll2853]

@@defaultgamer34857 because he didn't let him know

[@novinpradhan7629]

Thank you sir. The video was great !

[@thenetworkingdoctors]

Thanks Novin!

[@ashishsharma9116]

Why did you stopped making videos please upload complete networking videos.

[@Fruityb4e]

worth 43 minutes and 39 seconds. THE ONLY VID THAT HAS BEEN USEFUL! you explain everything !! i love this , kudos !

[@kesterdornelly5412]

Very helpful, closest I got to understanding IP. Excellent teaching.

[@staff0130]

Thanks Mike from Breaking Bad.

[@thenetworkingdoctors]

I wish!!!!...I would be quitting teaching and would be now in the Mediterranean

[@multicultures]

lmao comment of the decade

[@cocoarecords]

@@thenetworkingdoctors what’s stopping you from living that life?

[@afrohead2192]

Best explanation on YT just saying....

[@thenetworkingdoctors]

Thanks Afro Head!

[@UnKnownn2520]

Each one teach one sir...this video is spectacular...clear, concise...I love short cuts... Thank you also for the free education...I couldn't be more appreciative I will practice until I've absolutely mastered it...then I'll practice some more...

[@castielle532]

I'm currently taking IP Subnetting in my NTEC class at Clark College in Washington. I sure wish I could pause my professor from time to time like I did this video!! Sure helps to grasp the situation better when u can keep up, LOL. Thank you for this wonderful video!! I wanted to add on a side note that your book IS my textbook for the class, though this video helped out a great deal more in understanding it. Thanks again!!!

[@din956]

"did i memorize the hell out of it? yes I did" amazing =)

[@KCMMFB]

At the part where he is saying subtract 2 from the host side and asked why should we do that, I answered aloud. And then he said "Did you say that? Good." It was so 4th wall.

[@ridakhlyfat9688]

2020, 8 years later and still one of the best videos out there massive thank you :)

[@thenetworkingdoctors]

Thank you 😊

[@irvenekwambana4764]

After suffering for a long time trying to understand subnetting, a savior finally appeared and boom i'm now a confident network engineer. Thank you @The networking Doctors.

[@thenetworkingdoctors]

@Brahmanand Narsule All you need to is focus on the mask they gave you. 252 allots for only 2 IP's 248 allots for only 6 IP's 240 allots for 16 IP's...this would be the best choice. Hope it helped! Laz

[@paullampron201]

"240 allots for 16 IP's...this would be the best choice." - cmon laz. If the others are host counts ( i.e. ((2^(32-y))-2) ) a .240 would be 14 IPs not 16.

[@jaymatthews1131]

net ID and Broadcast ID 16 becomes 14. LOL noob

[@thenetworkingdoctors]

Jay Matthews Paul Lampron Oh I forgot to subtract two from the host side. But thanks for the mathematical equation. all I do is simply x.x.x.1111|0000 which equals 240 in the last octet, count by 2 from right to left, and double as you go till you get to the line and subtract 2. Oh by the way, lol, I was answering from a restaurant having lunch, through my Iphone...LOL!!!!!!

[@thenetworkingdoctors]

@Brahmanand Narsule Please excuse my oversite, since I was trying to answer in a hurry is happened to all of us, but you do subtract 2 always from the host side as I explained in the video :)

[@thenetworkingdoctors]

Today I will call it "Let's Correct Laz Day!" ***** What all of you don't know yet, is that I'm creating my own vocabulary words...heck! I may just decide to publish my own Dictionary...LOL! After all, who would of imagined that "LOL" would now mean "laughing out loud", or that BTW would now mean "by the way", or that a symbol like the @ sign will now be representative of the word "at". Therefore,@Networkified, in what will soon be known as "LAZ's Dictionary", the word "oversite" will soon be known to represent "oversight". BTW; not only was it a play using the word "site" ;) - but I was also typing from my phone at the time. I'm in front of my computer now! Please let me know if you find any other words that I can add to the infinite vocabulary for the new and upcoming "LAZ's Dictionary"... LOL! :)

[@Grumpkin100]

This was extremely helpful. Thank you for making this! I was trying to understand why at 17:44 you started counting from 2 rather than starting from 1 (as in the normal 1 to 128). Earlier in the video, you were counting starting from 1. How do you know when to do either of these? Thank you again for your amazing videos!

[@thenetworkingdoctors]

Everyone gets confused about that. So, I created a video to explain the method to my madness. Look for the video named “Counting by 2 and Double as you go”... it should clarify it.

[@Grumpkin100]

@@thenetworkingdoctors I will be watching that shortly! Greatly appreciated

[@tundeadebambo5767]

Oh my! You just made me sh*t on my pants (pardon the swear word) realising how easy this can be.. Thanks a great deal.. I'm healed

[@Whodamanimal]

This confounded me as well. I believe the case is: Count for hosts, right to left, starting with 2. Count for subnets, left to right, starting with 2. The increment (and therefore the broadcast calculation number) is derived from the BIT VALUE, which starts with 1 (starting from the right). This is why he counts the hosts and subnets on the bottom and counts the increment number and the broadcast calculation number on the top. Bottom: Start with 2's. Top: use bit value. Please correct me if I'm wrong about this. I've started taking Laz's CCNA class on Udemy. It's great! Thanks Laz!

[@Bhstickman]

@@Whodamanimal Came to the comments looking for this - thank you!

[@MrJulioamaral]

The best approach tô teaching subnetting i've rever seen. Hats off to you!

[@robbyn6631]

I've been watching many subnetting videos. All I got to say is you explain it the best compared to others. Thanks for this!

[@thenetworkingdoctors]

+Robby “Laz” Napoles ...thanks Robby!

[@tawabshahsidiqee2843]

Thank a lot this was a very important lecture for me . cause I am from Afghanistan.

[@thenetworkingdoctors]

Glad I was able to help 👍

[@3rdJose]

Doesn't matter where you're from

[@JunzVids]

firstly thanks for the great video. I just wanted to know why is it that sometimes you count including the one like at 15:33 but at 22:20 you count starting with 2?

[@thenetworkingdoctors]

+Junz Vids ...I explain that in another video called "Counting by 2's & Double as you go"

[@JunzVids]

okay i watched that video and what i understood from it is that when counting the bit values you count in ones and that is used in order to calculate the range?

[@DrLexic]

Thank you so much for this tutorial. This really helped me to understand the concept of subnetting. I wished I had had teachers like you in college.

[@kwhanson928]

Loved this video!!! Testing on 3/3/16 for IP addresses and Subnetting for CCNT and this is by far the best. I expect to ace the test! Thanks Laz

[@gogogogo4270]

انت رائع جدا thanx

[@thenetworkingdoctors]

Thank you Gogo Gogo...I think?

[@ryanhoutz5604]

Why when calculating the /28 Network you started counting the mask bits at 1 but when calculating the network with 100 hosts you started the mask bits at 2? Am I missing something or was that just a mistake? Great video though very helpfull.

[@sankoren123]

yeah.. i didn't got that too...

[@thenetworkingdoctors]

Thanks for helping me out! 😊

[@thenetworkingdoctors]

For further explanation you can watch my video called “Counting by 2 and double as you go” It should clarify your question

[@biancasobral1456]

You have NO clue how much you helped me out with my Into to Networks class. Thank you!

[@ivangutierrez7474]

Brother, you are simply fantastic!! Thanks a lot!!!! It has clarified my doubts on subnetting. Planning to take my exam very soon. This helped a lot.

[@krshah2008]

Thank you Johnny Sins

[@mordred7120]

Neptune's Beard Lmfao, thought I'm the only one.

[@overse8765]

hahaha

[@VideoGames0601]

Hi! My company using 106.133.196.0 IP address and using submask of 255.255.255.0, how come they used class A IP and they use class c submask, . hope you can help me about this thanks

[@gilcpd]

Great class! I needed a recap and watched other classes but couldn't remember how to calculate and the logic, your class what perfect because it was just like I had learned almost 20 years ago no new frills. Thank you.

[@thenetworkingdoctors]

Glad it was helpful!

[@rohitmishra2296]

Coming from app-dev background and wanted to learn networking deep but yet simple, OMG! This is the best thing I discovered on youtube in ages..thank you sir, you are a rockstar.

[@thenetworkingdoctors]

Thank you so much Rohit! 😉

[@sincere2da]

The subnetting is becoming second nature, which i'm told is the most important in CCNA

[@thenetworkingdoctors]

It is called the Kryptonite of the IT Professional...but not for you! Not anymore ;)

[@LEAGUEFAN]

thats a kai greene back right there :D

[@thenetworkingdoctors]

If only that were true...LOL :)

[@LEAGUEFAN]

you are a mastermind who knows how to train body and mind ;)

[@jribson]

Thank you so much, I am currently taking Network Engineering and have been struggling so so so much with subnetting. I took a bunch of notes from this video and think I have a pretty decent handle on it. I was struggling through my Cisco 1 course, I am definitely going to watch more of your videos to help myself understand. Amazing explanations, thank you again!

[@NeonblueIndustries]

Feels like I'm back at school again with an amazingly passionate teacher that kinda scares you into passing.. ha ha. Kick ass video. Top notch info!! The only channel I'll need for networking / routing setup. It's important to add some dry humor and comedy in, it puts the brain in a much more receptive state. That's probly why it's such a hit! Love the clear and emphatic speech. We need more Teachers like you bro!! Teachers that are passionate about there field. Thanks man!!!! Legend!!!

[@heavymetalrox268]

I don't get the comments saying "why is he mad at me" "why is he yelling". He sounds like a normal dude, just coz he doesn't look your average IT nerd don't mean he's angry.

[@thenetworkingdoctors]

Thanks Mr Robot!...I am normal right? 😎

[@baiterbait4888]

I agree! It kept me focused. Thank you very much for your tricks.

[@mcavelli]

Why do you start from 1 sometimes and you start from 2 sometimes.

[@thenetworkingdoctors]

You are not alone in this...and your in luck, because I do have a YT video that explains this. It's called "Counting by 2 and double as you go". Hope it helps! 😉

[@giorgoschronis5408]

+Ademola Ajibade I think long story told short: You start from 1 (or rather 128) when you count to find the increment while you start by 2 when you count for hosts and subnets.

[@JoshuaHults]

+Ademola Ajibade for now just memorize 1, 2 ,4 , 8, 16, 32, 64, 128 ........ lol

[@mcavelli]

Thanks

[@Pramod_Revolution]

+The Networking Doctors 76543210.....binary is 2 ... so every number is power with 2 sooo 2^7=128 2^6=64 2^5=32 2^4=16 2^3=8 2^2=4 2^1=2 2^0=1 i follow i like this is it correctly .......

[@charlesmukupa6469]

I love this guy, makes everything clear and simple. You the main man

[@thenetworkingdoctors]

Thank you Charles! ...I'm glad that this old video from the 70's is still helpful today as it was back then...lol 😉

[@tinman9341]

I’ve tried and tried to understand subnetting with other videos, memorizing charts and what not....30 minutes in, I finally found an easy way to subnet!!!! Thank you Mr. Stonecold!!!!!

[@thenetworkingdoctors]

Glad I could help.

[@HoRxii]

Thank you than you thank you ... this tut was a real eyeopener for me. I´ve read a few lectures but never understood how it realy works and than I watched your tut. AWESOME

[@MrAitSous]

This video tutorial is very cleary to know about subnetting. Now I can go further with my home networking and my study. Thanks a lot.

[@maskonoroff]

I've taken so many network classes and two CCNA courses. Never gotten an explanation like this. WOW dude your extremely awesome. I have ADHD and this really explained subnetting and its so easy hahaha. Thank you Thank you. It feels so good when it finally clicks after two semesters of network classes.

[@lawrenceburton2072]

Thanks for the help.. I am in school currently and the way they taught it was so confusing. with the knoledge i already had you made it make since. You are a ROCK STAR. again thanks

[@TheSincerety]

1 day until my ICND1 exam, this video really nailed IP and subnetting in. Now I can be sure I won't waste too much time on IP questions, thanks!

[@thenetworkingdoctors]

I’m glad it helped! Let me know when you pass 😎

[@ajiawa5990]

WOW!!! You're amazing. Your method makes so much sense. THANK YOU!

[@RabbitJnr]

Watched this video for the first time last night, and it was awesome......thank you thank you thank you!!!!!!!

[@stereobeatle]

i really enjoy your way of teaching. its blunt and straight to the point. Not going to lie, i have been struggling to grasp this concept in my ccna classes but after watching your vid i feel more comfortable with the process than i have felt in the last 8weeks of study. So thanks for the video :D

[@thenetworkingdoctors]

IP addressing and submitting is the Kryptonite of all IT professionals. So, don't feel bad...you are not alone, that's precisely why I made this video. To help those like yourself. A newer version will be coming out in 2016!

[@durell5946]

Just watched this for extra help in a class I'm taking. I would like to say thank you for taking the time to do this video. Extremely big help.

[@thenetworkingdoctors]

I hope it helped you pass! 📚

[@maksuud11]

You are awesome, I wish all instructors were like you. I needed a miracle to get this and you are it sir!

[@thenetworkingdoctors]

Thanks hodan!...I'm glad I was able to help.

[@fas0f]

I still haven't finished the video but I love the way you're explaining. Thank you man, continue the great work !

[@rbsouza190]

OMG, this video is from 2012 and it is helping a loooot! Thanks boss!!!