How to calculate broadcast address

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How to calculate broadcast address
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An IP address is a unique 32-bit binary code assigned for each computer. The IP address contains network and host parts. The network prefix describes a network while the host bits define a particular computer within this network. The subnet mask is a configuration parameter that helps to discriminate the network and host bits by assigning them "1" and "0" respectively. A broadcast address is a special IP address that allows to send a signal to all computers in a subnet. Example: Calculate the broadcast IP address if a computer in a network has the IP address of 192.35.128.93 and the network mask is 255.255.255.224.

Skill level:
Easy

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Instructions

  1. 1

    Convert the computer IP address to the binary form by completing Section 2.

    In our example, the binary form of 192.35.128.93 is

    11000000.00100011.10000000.01011101.

  2. 2

    Convert the subnet mask to the binary form by completing Section 2.

    In our example, the binary form of 255.255.255.224 is

    11111111.11111111.11111111.11100000.

  3. 3

    Determine host bits in the computer IP address that are represented as zeros in the network mask. In our example, the last 5 bits in the network mask are zeros, hence the last 5 digits are the host bits.

  4. 4

    Substitute all host bits in the computer IP by “1” to obtain the broadcast address in the binary form.

    In our example, the broadcast address is 11000000.00100011.10000000.01011111.

  5. 5

    Convert the binary broadcast IP address to the decimal-dot form by completing Section 3.

    In our example, the binary address 11000000.00100011.10000000.01011111 translates into 192.35.128.95 broadcast IP address.

  1. 1

    Navigate to the IP Converter using the link in "Additional Resources," below.

  2. 2

    Type the IP address in the field “Enter IP address” and click “Submit.”

  3. 3

    Read the binary IP address next to “Binary Conversion.”

  1. 1

    Navigate to the IP Converter using the link in "Additional Resources," below.

  2. 2

    Type the binary IP address in the field "Enter Binary Address” and click “Submit.”

  3. 3

    Read the IP address in the decimal-dot form next to “IPv4 Conversion.”

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