Subnetting – Notes, Images, Videos

I Found These Images Very Helpful






Best Video for Learning Subnetting




A – Private – Not routable on the internet

  •  Range: 1-127
  • CIDR: /8
  • N.H.H.H
  • 0


  • Range: 128 – 191
  • CIDR: /16
  • –
  • N.N.H.H
  • 10


  • Range: 192 – 223
  • CIDR: /24
  • –
  • N.N.N.H
  • 110


Bit Values

128     64     32     16     8    4     2     1


CIDR – how many bits on. each x is a bit

Network is everything that is on.

Host is everything that is off.

Hosts are numbers on the right subtract 2.

Subnets are from left to right and count how many bits.


Example Breakdown: /27

255 . 255 . 255.  111|00000

1 1 1 0 0 0 0 0

|128 64 32|

32 is increment



x.x.x.96 +31 = 127

96 subnet

broadcast 127


Examples Breakdown:


2 4 8 16 32 64 128

512 – 2 = 510



BIT =  Decimal

1    =    128

2    =    192

2    =    224

4     =   240

5     =   248

6     =   252

7     =   254

8     =   255


My Life Motto

Here’s my life motto with some slight alterations to relate to you. Take what helps and throw out the rest. Life is a beautiful thing. Don’t waste it away. You never know when life will be over. It is the most permanent thing and you can never go back. Tell people how you feel. Make peace where there is unfinished or unresolved conflicts. You might never get that chance again. What the hell, we have one life to live and we should live it to the fullest. And if something bad strikes you hard, just keep moving forward and don’t let it bring you down. Just keep moving forward and live your life. Never forget your objectives. Make great things happen and do great things. Don’t ever lose sight of your goals. I believe in you. Break out of the ignorance that the crowd chains you to be. Do something great. If you are depressed just keep moving forward. Don’t live for others. Live for yourself and love others. Everyday getting better and better in every way. Those who rely on forces outside of themselves are dominated by them.

How to be Poor

Shopkick – Points for gift cards on a scavenger hunt while walking around shops. No money spend needed.

Ibotta – rebates and coupons on your purchases.

Walmart App – sends you gift card with the difference if they find it cheaper in a week.

Wikibuy – Coupon codes generated for online shopping, also tells you if you can get it cheaper somewhere else

Car Parts – wholesale prices on otherwise expensive car parts.

Amazon Coupon Codes and Reviews – review for codes for free or discounted stuff. always check your email and follow instructions.

Always have direct deposit a portion of you check to a saving account that’s hard for you to easily access.

Work at home. Jobs like telenetwork, or if you can type fast, do the CC on

Sell your services –

Be an uber driver.

Sell your crap.

Dropship with,, etc.

Cut costs, you don’t need cable, always ask for lower prices, call up brands you like and give them a compliment, they typically send vouches for free stuff or coupons or gift cards.

Take advantage of your warranties.