Question

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

a. /16
b. /24
c. /12
d. /24
e. /24

Answer 1

RFC 1918 defines IP address blocks for private networks, which include a /8 prefix block, a set of /16 prefix blocks within a /12, and a /12 prefix block. Options a: /16 and c: /12 from the correct answers.

Step-by-step explanation:

RFC 1918 was used to create the standards by which networking equipment assigns IP addresses in a private network. A private network can use a single public IP address. The RFC reserves the following ranges of IP addresses that cannot be routed on the Internet: 10.0. 0.0 - 10.255. The IP address blocks defined in RFC 1918 are for private networks and they include three ranges of IP addresses.

Each block is associated with a different address space designated for private use: A single /8 prefix block: 10.0.0.0 to 10.255.255.255 (10.0.0.0/8) A set of 16 contiguous /16 prefix blocks: 172.16.0.0 to 172.31.255.255 (172.16.0.0/12) A single /12 prefix block: 192.168.0.0 to 192.168.255.255 (192.168.0.0/16). Therefore, the correct options that are defined in RFC 1918 are option a: /16 and option c: /12.