Question

An organization has been assigned the network number 200.25.100.0/24 and it needs to create a set of subnets that supports up to 60 hosts on each subnet. How to partition the IP address spaces to support the maximum number of networks? List all possible networks (use slash notations).

Answer 1

given ip address  200.25.100.0/24

Address:   200.25.100.0          11001000.00011001.01100100 .00000000
Netmask:   255.255.255.0 = 24    11111111.11111111.11111111 .00000000

taking and of address and netmask we get network address that is

200.25.100.0 11001000.00011001.01100100 .00000000

given maximum host is 2^6>=60

so last 6 bit is reserved for the host and first 2 bit of 4th octet is reserved for subnet address

subnet address	host min	host max	broadcast address
200.25.100.0	200.25.100.1	200.25.100.62	200.25.100.63
200.25.100..64	200.25.100.65	200.25.100.126	200.25.100.127
200.25.100.128	200.25.100.129	200.25.100.190	200.25.100.191
200.25.100.192	200.25.100.193	200.25.100.254	200.25.100.255