How to subnet at least 50 host?

As per your mentioned network. we will subnet this network for 50  hosts. 

12.1.1.0/?

you need 50 hosts. so the formula to calculate number of hosts bits is 2^h , where h is representing number of host bits.

So 

2^1 = 2

2^2= 4

2^3= 8

2^4= 16

2^5= 32

2^6= 64

So , 2^6 is fulfilling the required number of hosts. So we need 6 host bits. Now , how to calculate network bits, Its very simple . As we know there are total 32 bits , which are the total of host bits+network bits.

total bits= host bits+network bits

32 = 6+network bits

26 = network bits

So , you can subnet 12.1.1.0 for 50 hosts at 12.1.1.0/26

Hope it helps.

Thanks

hi Flower,

here are not mention here any IP .
so here Amit take a random IP( 12.1.1.0 ) for calculate 50 host.

when you calculate this IP's  ( 12.1.1.0 ) host that subnet is /26 (255.255.255.192) 

12.1.1.0/?