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IPv4 subnetting

Practice subnet mask, network, broadcast, first host, and last host calculations for a fixed CIDR.

Target IP address

Fill each answer left to right. Each octet is a separate field so you can tab through quickly.

  • Subnet mask

    IP address

    Correct:

    Answer:

  • Network address

    IP address

    Correct:

    Answer:

  • Broadcast address

    IP address

    Correct:

    Answer:

  • First IP

    IP address

    Correct:

    Answer:

  • Last IP

    IP address

    Correct:

    Answer: