What subnet mask or CIDR notation would be required to maximize the host counts while still meeting the following requirements: 192.168.228.0 255.255.255.128 Required Networks: 2 Required Hosts: 20

192.168.228.0 255.255.255.224

Explanation:

192.168.228.0 255.255.255.128

subnet mask: defines the host and the network part of a ip

CIDR notation : is the shortened form for subnet mask that uses the number of host bits for defining the host and the network part of a ip

For example: 192.168.228.0 255.255.255.128 has CIDR equivalent of 192.168.228.0\25

To have atleast 20 hosts

20 ≤ (2^x) -2

x ≈5

with 5 host bits, we have 2^5-2 = 30 hosts per subnet

and 2^3 = 8 subnets

To get the subnet mask, we have 3 network bits

1110000 to base 10 = 2^7 + 2^6 +2^5= 224

192.168.228.0 255.255.255.224