Network Masks

• Define which bits are used to describe the Network Part and which for hosts

• Different Representations:

  • decimal dot notation: 255.255.224.0
  • binary: 11111111 11111111 11100000 00000000
  • hexadecimal: 0xFFFFE000
  • number of network bits: /19

• Binary AND of 32 bit IP address with 32 bit netmask yields network part of address

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