Given network 172.18.109.0, which subnet mask would be used if 6 host bits were available?

Given network 172.18.109.0, which subnet mask would be used if 6 host bits were available?

  • 255.255.255.192
  • 255.255.255.252
  • 255.255.224.0
  • 255.255.255.248
  • 255.255.192.0
    Answers Explanation & Hints:

    With an IPv4 network, the subnet mask is determined by the hosts bits that are required:
    11 host bits required – 255.255.248.0
    10 host bits required – 255.255.252.0
    9 host bits required – 255.255.254.0
    8 host bits required – 255.255.255.0
    7 host bits required – 255.255.255.128
    6 host bits required – 255.255.255.192
    5 host bits required – 255.255.255.224
    4 host bits required – 255.255.255.240
    3 host bits required – 255.255.255.248
    2 host bits required – 255.255.255.252

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