Which of these is an RFC 1918 address?
A) 100.10.244.7
B) 168.192.1.20
C) 172.27.27.27
D) 127.0.0.1
E) Maybe I should plug the address into my GPS application
The answer: C) 172.27.27.27
An RFC 1918 address is also called a “private” address, and there are three ranges associated with private IP addressing:
10.0.0.0 through 10.255.255.255
172.16.0.0 through 172.31.255.255
192.168.0.0 through 192.168.255.255
If an IP address is in any of these ranges, it is considered an RFC 1918 address.
The loopback addresses, 127.0.0.1 through 127.255.255.255, are not RFC 1918 private addresses.
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Want to know more? Watch “An Overview of IPv4 and IPv6.”The primary IP technologies used today are IP version 4 and IP version 6. In this video, you’ll learn the differences between these two technologies, the differences between public and private IP addressing, and how automatic private IP addressing (APIPA) can be used to provide connectivity. |