Dude, thank you for this video. I've been using Stormwind training at my job and your video plus there training has FINALLY made me understand subnetting. Words can't express how much this video has helped me. Thank you!!!!

I learned more than in any of my network lessons :) Our teacher rarely writes anything on white board, he just uses slides and talks too much.

I've watched several videos on sub-netting, but this is the most simplified and most explanatory. I haven't slept because i have a task to submit on Monday. Thank You for this short and beautiful video. And Joey! , thanks for asking this question.

@madedd02 I probably should have used an address between 128.0.0.0 - 191.255.255.255, but what is more important in this case is the class of the subnet mask. The class of the address (1st octet #) is only important if we are sticking to classful masks, but in subnetting the mask is altered anyway. So it is "Class B Subnetting" for me, in the fact that the mask is between a 16 and a 24 bit subnet mask and it is located in the 3rd and not the 4th octet. I hope that helps...

Gr8 explanation, loud talking, which is very desirable. Simple and educating Keep going the same direction. Big bow

That's the best netmask explanation I ever heard, thank you Dan!

your videos have been helping me through my apprenticeship in a great way, just wanted to say thank you, as i'm now reviewing some of those vids for my mid-term exam!

having my cisco ccna 2 4.0 practical test tomorrow and this helped me alot, thank you so much!

All I can say is that you are a gifted teacher who speaks the student language!.

That's knowledge ,pure knowledge which will become money one day .thank u Dan u rock

Very good explaining? ❤ Love it. I wish everyone taught like this. An egoist tries to make himself look smart by confusing people, but a truly SMART person makes complex things very easy to understand.

@madedd02 You are right having the number 192 in the first octet would signal a class C address. However one thing that is not always covered when talking about address classes is that they need the netmask to actually cover the correct range of numbers in that class. So when I talk about class B I am referring to a starting netmask of 255.255.0.0 as opposed to starting with a netmask of 255.255.255.0

@ramperstraught8691

6 жыл бұрын

danscourses how to subnet 192.168.10.0/22 to get 5 subnet with host 190

Thank you! Solving for less then /24 had me stuck, realizing that ( 16) was =class B (

The best channel for networking.. he made it very easy to learn networking.

Never came across the magic number before. It's a good way of explaining it. Cheers

This is one lecture that I will never ever forget for it made my SUPER and SUB-netting grasp easy and understandable now. I am using Boson Calculator as a tool for verification and it always made me smile :-)! VERY VERY COOL!

great stuff that helped me out a lot with the supernetting as you mentioned in your description

@alebert32 I stand by what I said, if you are borrowing bits it is not classful, classful means the subnet mask is /8 /16 or /24 only. I titled the video as Class B Subnetting because I start with a /16 netmask and then I proceed to subnet it. Regardless of the number in the first octet the subnet mask is what is important in subnetting.

@LittlePokeDigi to add an additional 10 subnets you will need to borrow 4 more bits from the subnet mask changing it from a /16 to a /20. that is, if you started with a /16 address. by changing the subnet mask to /20 you create an additional 16 subnets. example 172.16.0.0/16 ...to... 172.16.0.0/20, 172.16.16.0/20, 172.16.32.0/20, 172.16.48.0/20, 172.16.64.0/20, 172.16.80.0/20, 172.16.96.0/20, 172.16.112.0/20, ... and so on

Man god bless you i've been trying to do my homework and just couldn't get one right this video just saved me..

@danscourses Hi there, I watched the 3 videos and I understood the meaning of the Magic Number, it is a good point to use to understand the networks.Now I think I can do it all right! Thank you very much and congratulations on your good videos.

i am studyin ccna and am trying to understand the subneting. i found it hard but i think watching through your video it gave me a hint of how to workout subneting. thank you and if you add more videos about subneting it wil help me more.

I came across your channel by accident but you explained in 5 mins what my teacher couldn’t show us in an 4hr course

I appreciate this video so much. Thank you!

YOU HAD ONE JOB JOEY

@iambubba34234

7 жыл бұрын

lmao!

@hakureislut

7 жыл бұрын

lol bro

sir. you're mixing up the ip ranges between Class C {192-223} and class B {128 - 191}

@PineNutButter

4 жыл бұрын

is never matter what class is. its all about the subnet mask.

@abdirahmanabdullahi1150

3 жыл бұрын

@@PineNutButter Yes

@alemayehutiruneh279

3 жыл бұрын

@@PineNutButter but we can not say /16 for class C it is for class B network for class C/24 so we can't say we borrow 6 bits from 3rd octet while we decrease 2 bits from 3rd octet.

@abonao I think I should have used an address in the actual Classful B range for the video then it would avoid confusion. However in the video the important thing is the length of the subnet mask. If its length is /16 to /23 then it is subnetting in the Class B range.

Cheers mate, helped a lot, thats a quick and effecient way to subnet

@sbrave if the magic number is 4 (in the 3rd octet) meaning the subnet mask is 255.255.252.0 the the networks are 192.162.0.0 and 192.16.4.0 and 192.162.8.0 and so on so the last host in the 192.162.0.0 subnet is 192.162.3.255 and the last usable is 192.162.3.254 because 3.255 is the broadcast address or the last host of the subnet before it becomes a new subnet at 4.0 . In other words the octets turn over after 255 because an octet is 8 bits which is 0-255 or 256 total values starting at 0

Great explanation. Thanks Dan!!!

/22 subnetting is really useful with 4 sizes jump in the allowed sizes. Thank you.

@alebert32 I am sorry, I meant Class C. Any number between 192.0.0.0 to 223.255.255.255 would indicate a class C address, but what really matters today is the length of the subnet mask. That was my point

This is the type of question's my professor is throwing at us like, what's the zero network? , how many bits borrowed? What's the formula for host, for network? last host, first host? Thank you this video makes things clear.

thank you very much sir,..with your patient and clear explanations,...very big help..

Hello! I am currently reviewing for CCna RS training. Planning to take CCNa Exam around october or november? hopefully. I was searching on youtube. Found out your channel. Current lesson we had is about VLan and subnetting. I'm gonna study your videos as a guide as well as review what we had discuss in workshop. Thank you for this. :)

dude, thats money alright...! might be able to pass the remaining CCNA chapter yet!! So easy to follow, thank you..

@abonao Yes, I agree.

Thanks for such a clear explanation!!!!!!

Thanx alot dan. You are so easy to follow

very good video. Please keep it up! extremely helpful.

@LittlePokeDigi The magic number is the same in every octet or Class. /16 the magic number is 1, /17 magic number is 128, /18 magic number is 64, /19 magic number is 32, /20 magic number is 16, /21 magic number is 8, /22 magic number is 4, /23 magic number is 2, /24 magic number is back to 1,

Thanks for help, very useful information !!!!

good video..learnt the mechanism..thanks

do you know where can i find how to convert a class C ip address into a subnet mask that can provide 32 subnets

great way to explain it!!

I was kinda confused about subnetting class b networks. Looked about a bunch of other videos this morning. No luck. This video nailed it for me in five minutes. Thanks.

@yakoubtzmabewa1875

7 жыл бұрын

what ipv 4 means

@dvdgantt1

5 жыл бұрын

Internet Protocol Version 4 👍

@MrTr4nc3 remember that the Subnet Mask is 11111111.11111111.11111110.00000000, so the subnet is happening in the 3rd octet (left to right) and the MagNum is 2. so the networks from the first subnet are: 192.196.0.0, 192.196.2.0,192.196.4.0, 192.196.6.0, 192.196.8.0, and so on until 192.196.176.0, 192.196.178.0. So ask yourself in this scenario what kind of address is 192.196.176.255 or 192.196.177.0 if it is between .176 and .178 then it is a valid host address how else can u get 512 hosts

be aware that in subnetting the 0 and the 255 is used differently in cisco etc

great explanation

@alebert32 I agree, I am going to have to redo this video.... just dont want to, too lazy :)

Easy to understand, thanks.

@madedd02 look at the cidr. 192.162.3.6 is a class c range, but the /cidr shows /22 is the class b range subnetmask. therefore the octet you need to look is at the 3rd octet from the left. and screw the class c subnetmask. Yeah I know you'll be confuse. Unless you want to do the boolean andding or the formulae which is complicated, this one is pretty straight forward.

To assist with determining the number of hosts, I have always kept it straight by adding the the zero bit binary place values together starting with the 7th bit in the last octet till you reach the first borrowed bit, i.e. - 2 + 4 + 8 + 16 + 32 + 64 + 128 + 256 + 512 = 1022. Do you recommend doing it this way or do you have another method?

thanks for the understanding

Good lectures in this channel. Could you please give the number of subnets and number of hosts per subnets for this particular example.

COME ON JOEY! WHATS THE MAGIC NUMBER!!!!!!!!!!!!!?????????????

@Sky_Gazer1

8 жыл бұрын

+Ferret2YourFace Here is a little summary :) class "A" /8, "B" /16 and "C" /24 (Normally) Now, /22 means we've borrowed 6 bits from Host portion to the Network or Sub-net ID portion in class "B". Now, count from left to the right side of the bits in the following series of (Digits!!)... 128 64 32 16 8 (4) 2 1 WHAT IS THE 6TH BIT FROM LEFT TO RIGHT??? OF COURSE IT IS "NUMBER 4" :) If we borrow 7 bits, the magic number will be "2". It is the lowest Network bit we can CREATE ranges with. (Hope it will help you a little :)

@iqgetsuga9404

8 жыл бұрын

+shahab384 LOL he's trollin' dude ! xD

@ELMITLON

7 жыл бұрын

THE NUMBERS JOEY! WHAT DO THEY MEAN?!

@acidraindrops6657

5 жыл бұрын

Abusive to Joey much?

@thacris2105

4 жыл бұрын

KJASHDKJASH

Well explained sir.

@danscourses I don't get it. Are you saying for each range address goes from ex: 192.162.4.0, to x.x.4.1, 4.2, 4.3 etc up to 254 and then rolls over to 192.162.8.0? I'm still pretty new at this and everybody explains it differently...lol

yes exactly.

@notomab3 Yeah the fact that he is using a class C IP to show a class B subnetting is REALLY FING CONFUSING!! I'm glad you have confirmed my suspicion that he was doing it wrong.

@danscourses I have a similar problem with an address of 172.16.10.0 /23. but i don't understand how if the magic number is 2, do i just keep counting with 2's all the way up to 256? i'm not really explaining myself well. but in regards to the previous persons question, how did you get 192.196.176.0 to 192.196.177.255? how did you count that out? sorry if the question is kind of stupid, i just for some reason can't wrap my brain around it. Thanks!

That is money sir. Helped me a lot.

Money Haaaaaaaaaa! Dans you're awesome w

Now it makes sense. Tomorrow I'll come back to watch the same video and be confused all over again...lol

very helpful video

Thank fella you are the man :)

Why is it the last usable host if it keeps going up by 4. Surely as networks go up so do usable hosts?

Regardless, if the ip address is 192.162.3.6 /22, the network is 192.162.0.0 /22 and the broadcast address is 192.162.3.255 /22 just like I showed in the video.

this is so helpful! money!

I'm guessing this example should work the same for all like scenario's? So I should be able to use this method with the following examples 101.11.1.0 /15 172.11.1.0 /27 192.11.1.0 /22 would it work for things such as 172.11.1.0 /12?

Thanks 😊.

Thank you teacher!!!! Lots of love from Malaysia 😍💕

@danscourses what happens if you are supernetting a class C and you get a /22? i just think for the sake of the title and the use of a class c address was a bad decision. i was only trying to brush up on my studies.

The title says subnetting a class c ip address as a class b because de CIDR is in the third octet. /22 (You can treat any ip address as any class if you are giving an example.) Lets say I have a couple of networks in my private company, I can still use this class C ip address and give it a class B netmask.

good job ....

@MrTr4nc3 In a /23 address 11111111.11111111.11111110.00000000 the last borrowed bit is in the 2's place so the magic number is 2 meaning the networks go up by 2. So the networks are: 192.196.176.0 - 192.196.177.255, 192.196.178.0 - 192.196.179.255, 192.196.180.0 - 192.196.181.255 Watch my video tutorials on subnetting with "the Magic Number" you will find them in my CCNA1 playlist

Money !! Money.... Seriously helped a lot...Thanks to yu n KZread!!!

just one question, why you use 255 in broadcast and 254 as last usable?

yes

@danscourses It's a CLASSLESS IP but under class B

yes i got a question , the ip address you have used as in example ,is it a class b or c?

I have a question, what happen if the IP range are in the class b range, but the /CIDR shows in class C or A ? how do you make a calculation using the same method like the one you're teaching ?. I give an example, let say 155.162.3.6 / 25 or 155.162.3.6 / 7. How to applied your calculation ? please respond to my comment. Thank You.

How is it that you say you are going to subnet a class B address of 192.162.3.6, just because you decide to put a /22 in front of it, if the class of an address is defined by the first octet? If the first octet is a class C address. How does it magically convert into a class B just by altering the mask?

good job

amazing !!!

very good !

whats the first and last usable host of 192.162.4.0?

and all CIDR indicates is how many bits you are borrowing, either for a classful or classless thanks for your time, and good luck

how would you do this if it was /16 or /24?

how do you get 1022 host in /22 networks? can elaborate?

very useful

Thanks Dan...Money it is

Thanku so much sir ji

Can any explain me this: How many subnets and hosts per subnet can you get from the network 172.25.0.0 255.255.252.0? Answer: 64 subnets and 1022 hosts? I got the magic number which is 4 so the first usable network is 172.25.0.1 last usable network 172.25.3.254 172.25.4.0 so on.... in the first usable network i can have 253 connections? so total i got 1012 connections in each subnet and i figure 256 divide by 4 = 32 subnets im getting wrong answer for my network connection in per subnet!

My question is (2)...Why is there a mask and is the mask the same definition as a disguise?

dan u r awesome and crazy!!!!!!!!!!!!!money money

Thank you so much ^_^

man u r just awesommmmmm i never understand this stuff but tx to u i got the hang of it DAN ARIGATO :3

it is nice description

does the teach know what a class C range is