Which three IP addresses are considered private addresses? (Choose three.)

  • 172.17.254.4
  • 128.37.255.6
  • 10.234.2.1
  • 198.168.6.18
  • 172.68.83.35
  • 192.168.5.29
Explanation & Hint:

The concept of private IP addresses is defined in RFC 1918, which specifies certain IP address ranges that are reserved for use within private networks. These addresses are not routable on the public internet. Based on this definition, the three IP addresses from your list that are considered private are:

  1. 172.17.254.4 – This address falls within the 172.16.0.0 to 172.31.255.255 range, which is reserved for private networks in the 172.16.0.0/12 block.
  2. 10.234.2.1 – This address is part of the 10.0.0.0 to 10.255.255.255 range, reserved for private networks in the 10.0.0.0/8 block.
  3. 192.168.5.29 – This address is within the 192.168.0.0 to 192.168.255.255 range, which is reserved for private networks in the 192.168.0.0/16 block.

The other addresses listed (128.37.255.6, 198.168.6.18, and 172.68.83.35) do not fall within the private IP address ranges as defined by RFC 1918.

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