Subnetting explained under 10 minutes, IPV4 class C.

Rules:
1. The subnet mask divides the networks and the hosts
2. bit = 1, byte =8 bits
3. IPV4 = 32 bit or 4bytes
4. Remember Binary : 128 64 32 16 8 4 2 1
5. Magic Number

Watch full Video for the Charts.

1.) 192.168.0.0 /24
192.168.0.0 /24
192.168.0.0 = Address
255.255.255.0 or /24 = Subnetmask

Where do we get 255 ?

128 64 32 16 8 4 2 1
1 1 1 1 1 1 1 1 = 255

192.168.0 = Network .0 = host

2.) 192.168.0.0 /25

192.168. 0. 0 = Address
255.255.255.128 or /25 = Subnetmask

/25 = 255.255.255.128

3.) 192.168.0.0 /26

192.168. 0. 0 = Address
255.255.255.192 or /26 = Subnetmask

/26 = 255.255.255.192

4.) 192.168.0.0 /27

192.168. 0. 0 = Address
255.255.255.224 or /27 = Subnetmask

/27 = 255.255.255.224

5.) 192.168.0.0 /28

192.168. 0. 0 = Address
255.255.255.240 or /28 = Subnetmask

/28 = 255.255.255.240

6.) 192.168.0.0 /29

192.168. 0. 0 = Address
255.255.255.248 or /29 = Subnetmask

/29 = 255.255.255.248

7.) 192.168.0.0 /30

192.168. 0. 0 = Address
255.255.255.252 or /30 = Subnetmask

/30 = 255.255.255.252

source

ipv4