Question

Which of the following IP address blocks are defined in RFC 1918? (2)

/16
/24
/12
/24
/24

a) /16 and /12
b) /24 and /24
c) /12 and /24
d) /16 and /24

Answer 1

RFC 1918 defines private IP address ranges as 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. The correct answer is d) /16 and /12, which correspond to the 172.16.0.0/12 and 192.168.0.0/16 address blocks.

Step-by-step explanation:

The IP address blocks defined in RFC 1918 are private IP ranges that are used within a local network and are not routable on the internet. These private IP ranges help in conserving the global IP address space and allow organizations to create large networks without using publicly registered IP addresses.

The address blocks defined in RFC 1918 are:

• 10.0.0.0 - 10.255.255.255 (10/8 prefix)
• 172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
• 192.168.0.0 - 192.168.255.255 (192.168/16 prefix)

Based on these definitions, the correct answer to the question is d) /16 and /12. These correspond to the 192.168.0.0 to 192.168.255.255 and 172.16.0.0 to 172.31.255.255 address blocks respectively.