A quick intro to subnets and binrary math.

1. Dave’s Quick and Easy.. Binary Maths For Aerial Fitters!

2. Write yourself a Grid 1 2 4 8 16 32 64 128

3. Start Easy ‘0’ This says 0 is made up of none of the above numbers! 0 0 0 0 0 0 0 0 1 2 4 8 16 32 64 128

4. And 1… Also since 1 is the only odd number, if you have to make an odd number you must use 1! You can only make 1 by using the 1 column 1 0 0 0 0 0 0 0 1 2 4 8 16 32 64 128

5. How about 192 192 is used a lot on home routers such as in the ip address 192.168.0.1 192 = 1* 128 + 1* 64 and that is it! 0 0 0 0 0 0 1 1 1 2 4 8 16 32 64 128

6. What is the ip of my router in binary? 1100000.10101000.00000000.00000001 == 192.168.0.1 168 192 1 0 0 0 0 0 0 0 1 1 1 2 4 8 16 32 64 128 0 0 0 1 0 1 0 1 1 2 4 8 16 32 64 128 0 0 0 0 0 0 0 0 1 2 4 8 16 32 64 128 1 0 0 0 0 0 0 0 1 2 4 8 16 32 64 128

8. Today I found out that google’s address is 74.125.53.100 Lets see what that looks like 01001010.01111101.00110101.01100100 == 74.125.53.100 125 74 100 53 0 1 0 1 0 0 1 0 1 2 4 8 16 32 64 128 1 0 1 1 1 1 1 0 1 2 4 8 16 32 64 128 1 0 1 0 1 1 0 0 1 2 4 8 16 32 64 128 0 0 1 0 0 1 1 0 1 2 4 8 16 32 64 128