SSCP · Question #712
Which of the following is an IP address that is private (i.e. reserved for internal networks, and not a valid address to use on the Internet)?
The correct answer is A. 10.0.42.5. 10.0.42.5 falls within the 10.0.0.0/8 private address range defined by RFC 1918. RFC 1918 defines three private (non-routable on the public Internet) IP ranges: 10.0.0.0–10.255.255.255, 172.16.0.0–172.31.255.255, and 192.168.0.0–192.168.255.255. The addresses 11.0.42.5…
Question
Which of the following is an IP address that is private (i.e. reserved for internal networks, and not a valid address to use on the Internet)?
Exhibit
Options
- A10.0.42.5
- B11.0.42.5
- C12.0.42.5
- D13.0.42.5
How the community answered
(24 responses)- A92% (22)
- C4% (1)
- D4% (1)
Explanation
10.0.42.5 falls within the 10.0.0.0/8 private address range defined by RFC 1918. RFC 1918 defines three private (non-routable on the public Internet) IP ranges: 10.0.0.0–10.255.255.255, 172.16.0.0–172.31.255.255, and 192.168.0.0–192.168.255.255. The addresses 11.0.42.5, 12.0.42.5, and 13.0.42.5 all fall in publicly routable Class A address space and are valid Internet addresses. Private addresses are used internally and are translated to public IPs via NAT when accessing the Internet.
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