Binary 101

The computer reads in a language called "Binary" Were "1's" and "0's" represent what the computer will see.

1=ON 0=OFF

1=1

2=10

4=100

8=1000

16=10000

32=100000

64-1000000

128-10000000

Now, the computer reads in a chart similar to this:

128 64 32 16 8 4 2 1

If you wanted to create a number such as "11" you would need to turn on the 8, the 2 and the 1 so it would look like:

00001011 (Which equals "11" in decimal form"

caption

More Examples:

11111111=256

00000011=3

00010001=17

IP address and Binary

IP address are ussualy represented in decimal format, Separated each part of the address with a period by each octet (8 bits) All IP address are 32 bits long. Your standard class C address is in decimal form but has been converted from binary, So take your standard IP such as 67.128.127.13 and in an packet header it would be read as the following:

01000011.10000000.01111111.00001101

As a class C the bold part is the "Network" Portion of the IP address, while the rest is the "Host" Layer of the address.