Here are some notes on IP subnetting for beginners.

1 and 1 = 1, everything else = 0.

An IP v4 IP address is 32 bit and made up of four octets, each 8 bits long. The minimum octet value is 0 and the maximum octet value is 255. 4 x 8 = 32.

The decimal notation to binary chart for IP subnetting is: 128, 64, 32, 16, 8, 4, 2, 1 The sum of which is 255 (128+64+32+16+8+4+2+1). 128 is the first 1 in binary chart, 1 is the last.

To convert a IP address from decimal to binary separate each octet, e.g. 203.170.50.1

203 = 128+64+8+2+1 or 11001011

170 = 128+32+8+1 or 10101001

50 = 32+16+2 or 00110010

1 = 00000001

1 and 1 = 1

1 and 0 = 0

0 and 1 = 0

0 and 0 = 0

If your IP address is 192.168.183.91 and your subnet mask is 255.255.255.224 you can find the network address as follows: Continue reading “Subnetting Notes for Beginners”