Subnetting Made Easy Part 3

[@manasemichaelmhando8034]

Subnet # 1 : 170.70.0.0 it's a class B with a default of 16 bits in a mask of 255.255.0.0, Convert 255.255.0.0 into decimals: -> iiiiiiii. iiiiiiii. 0000000.0000000 We need 1000 host which means it extends our default mask (based on video it's 10 bits), since full mask it's 32 bits -> 32 - 10 = 22 bits Meaning borrowing some bits on the third octet to extend the default mask, but the default mask contains 16 bits already we have to add 6 bits to get 22 usable bits. -> 16 + 6 = 22 bits -> iiiiiiii. iiiiiiii. iiiiii00. 00000000 (New sub-net that can handle 1000 usable ip address) Convert the new sub-net into decimal -> Full octet with "i" is 255 and "0" is 0 128-64-32-16-8-4-2-1 (Sums up the "i" not "0" on the 3 octet) -> iiiiiiii.iiiiiiii.iiiiii00.00000000 Answer -> 255.255.252.0

[@arifchangezi658]

wonder how come your videos are not liked by so many! these are indeed the best of the best video I have ever seen for learning subnetting.

[@arifchangezi658]

maybe the other guys are paying Google to keep their videos on top. dirty jobs everywhere

[@dodgebert]

In this example, 10 bits were borrowed in order to get as close to 1000 ip addresses as possible.. There are 8 bits per octet and there are four octets. 8*4=32. So overall,there is 32 bits available. Since we used 10 bits, we have to subtract 10 from 32 which gives us 22. /22 in decimal form is 255.255.252.0.

[@shingetsu10]

In previous videos, he got the number by adding together numbers on the left. Why now is he suddenly using a different calculation? Also can't for the life of me understand how you get to 252 from 22. Perhaps this is maths beyond the capabilities of a laymen.

[@inajausa]

Thank you guys for making it so simple! I've struggling with subnetting in college for the past few weeks, but your method is a lot easier than what I've been thought in class, so I believe from now on, I should have no problems subnetting! Thanks again.

[@jblackbeanproject]

Jacob your videos about subnetting are awesome. But this one on Class B got me (and some other people judging by the commentaries). The part about the 32 octets minus 10 was confusing for me. mind doing a review on this one?

[@sirbruce5978]

So, the principles that govern how we work Class C, also completely govern Class B and Class A? This is awesome. Honestly, I have just walked away from the way my school teaches it. Thank you!!!

[@zmatt890]

Certainly one of the best ways out there to learn this. Thank you!

[@emekaanachebe415]

Bravo! I just saw your three videos and I know subnetting now. I practically paused this video at the beginning and did the exercises myself. Guess what? my answers were correct. Thank you!

[@jmhm17]

Great video this helped me a lot. I love that you dont clutter the tutorial with binary conversions

[@kandarashah8847]

thank you jacob for ur easy n clear explanation about subnetting i want to thank you sir ...

[@kj041n]

best subnetting with logic. thumbs up!

[@ADOS_DSGB]

Just the video I needed to help me with class B subnetting, thank you so much!

[@gritlog]

Best explanation on the internet..

[@avazara408]

Amazing Amazing The way you teach & explain is like water clear Cheers

[@dembajah315]

very nice bro the best among the rest ,,,, much respect man

[@TheAudrahendrix]

ah yes!! It's always so easy when you see it done. THANKS!!

[@kandarashah8847]

by watching ur video i finally understand about subnetting....thank u so much....

[@NGTAcademy]

Kandara Shah, thank you for the amazing comments - I truly appreciate your kind words and am so happy that I've been able to help you :) All the best - Jacob

[@ribelin3857]

Cant praise you enough for starters like me.

[@TheLandazar]

I know this already, but this video is very useful, thank you!

[@melurena]

great tutorial, helped me a lot thank you!!! hope u keep uploading more!!

[@yassenal_asadi3146]

great experience 😍😍😍 thanks alot

[@gaganthin]

Nice Thanks man :) Greetings from Germany ;)

[@xgadventures]

how did you get the 252 part in subnet 1? I understood how you got it in your class C ones but im a bit confused.

[@BillyVaughn]

That's how many bits were for the subnet in the third octet (22 total for subnet). 16 for the first two octets leaves 6 for the third. If you add them from left to right (128 + 64 + 32 + 16 + 8 + 4) you get 252. Hope that helps.

[@samwamui]

@@BillyVaughn thank you

[@MahindaWalisundara]

Superb great tutorial , thanks

[@MistaHuynh]

Your amazing! !!! Please keep uploading..

[@zblackcardaffiliate5530]

Holy Smokes This is thee best ever!!! Thank you so much!!!!

[@JesusRCasales]

I'd like to know how you decided to jump from mask net 255.255.252.0 to 255.255.255.128 i got lost there.

[@swiss7800]

how do you work out total number of network address and ip address range for each subnet?

[@bvess08]

I do not understand on how you got a /25 on subnet 4. How did you count that to the 25th bit?

[@TheDoomclaw]

can these methods apply to classful as well as classless?

[@Bingbangbo3246]

Shame on the SPAM, Good explanation, still a big gap on how to get the 255.255.252.0 mask?, how do you calculate that?.

[@shrikanthn5460]

your explanation on subnetting is really great and easy. i am little confused of subnet #1 : mask :255.255.252.0 and subnet #3 : mask : 255.255.254.0 please say me.

[@hamzasalafiyoon]

could you tell me why you had 255.255.255.128 as the mask for subnet #4? wouldnt it be 255.255.128.0? im lost at that part

[@LMEngineering]

way easier than how I originally learned!

[@ch13t]

Thank you.

[@TheAudrahendrix]

saw part 1 and part 2. Practiced based on those. (GREAT HELP!! THANKS!) However, I am at a loss to figure out how you got the mask 255.255.252.0.. Sorry if this is dense of me!

[@shingetsu10]

Same

[@tasha9650]

9yrs later here I am watching this & lost on the same part, great LOL. Pls help if you ever figured it out...and happen to remember 😆

[@achalvyas90]

what happened after part 2?

[@endijohnson5863]

where'd you get 252 from

[@endijohnson5863]

I'll find another KZbin video and see if someone else can better explain. I was understanding it then I got lost

[@komodospider]

How did you calculate the mask at 3:37? (255.255.254.0)?

[@sinan.e]

Because 2 subnets requested. You should repeat the first rule. I missed too the first time, but i realised when read carefully.

[@aldridgedominic]

man.. u are good!

[@iphyzoR]

Nice video dude :D it helps

[@dembajah315]

but this last one is little bit fast than the first two, i do really appreciate

[@shingetsu10]

You lost me at .252. Where did that come from? In previous videos you added together the number to the left of the line. In this case that would be huge number. Yet somehow you ended up with 252

[@DAForex]

Hey same, did you figure it out?

[@BillyVaughn]

@@DAForex That's how many bits were for the subnet in the third octet (22 total for subnet). 16 for the first two octets leaves 6 for the third. If you add them from left to right (128 + 64 + 32 + 16 + 8 + 4) you get 252. Hope that helps.

[@BillyVaughn]

Just to be a little clearer each octet can only be up to 255 so you do each octet individually when figuring the subnet mask.

[@កូនចាបតូច-ដ4ន]

Amazing :D Thank so much

[@SyedAfzalAlii]

How to calculate req of 300 host? How to calculate req of 600 host?

[@SyedAfzalAlii]

You said req of 30 host u select 16 8 4 2 1= 31 what about req of 30 host 1st ip add networl id last one broadcast ip add i didn't get properly

[@hichames-slam8135]

thank very mach

[@karthikeyanthebest]

Thanks alotttttttttttttt

[@azharuddin28]

tnxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx sir very helpul

[@kristiyanivanov7414]