CyberCertPrepSecurity FundamentalsNetworking FundamentalsEASYFree question
Which IP address ranges are designated as private (non-routable) addresses?
- A.Any address starting with 192
- B.100.0.0.0/8 is private
- C.Only 192.168.x.x is private
- D.10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 are the three private IP address ranges defined by RFC 1918 - these addresses are not routable on the public internet and are used for internal networks
Why D is correct
RFC 1918 private ranges: 10.0.0.0-10.255.255.255 (Class A, /8), 172.16.0.0-172.31.255.255 (Class B, /12), 192.168.0.0-192.168.255.255 (Class C, /16). Also: 127.0.0.0/8 (loopback), 169.254.0.0/16 (APIPA/link-local).
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