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26 April, 11:07

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

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  1. 26 April, 12:24
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    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
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