Class C Subnetting

Subnetting of class C :

Given IPv4 address : 192.168.50.112/25
Subnet mask : 255.255.255.128 (10000000)

128  64  32  16  8  4  2  1

192.168.50  .01110000
255.255.255.10000000     AND Operation
192.168.50  .00000000 

1- Network Id = 192.168.50.0
Magic Number is 128 (last bit value which is used in Subnet )
2-Total no of host per subnet = 2^7 =128
3-Total no of subnet= 2^1 =2
4-Total No of usable host =2^7-2=126
5- 1st subnet 192.168.50.0

• 1st IP address : 192.168.50.1
• Last IP address :192.168.50.126

6- 2nd subnet 192.168.50.128

• 1st IP address :192.168.50.129
• Last IP address :192.168.50.255