A network administrator is documenting the RFC 1918 private IPv4 address space allocation for an enterprise network redesign. Match each RFC 1918 address block on the left with its corresponding CIDR prefix length and block composition description on the right.
- 10.0.0.0 – 10.255.255.255/8 prefix length comprising 1 Class A network block
- 172.16.0.0 – 172.31.255.255/12 prefix length comprising 16 contiguous Class B network blocks
- 192.168.0.0 – 192.168.255.255/16 prefix length comprising 256 contiguous Class C network blocks
Answer
10.0.0.0 – 10.255.255.255 matches '/8 prefix length comprising 1 Class A network block'; 172.16.0.0 – 172.31.255.255 matches '/12 prefix length comprising 16 contiguous Class B network blocks'; 192.168.0.0 – 192.168.255.255 matches '/16 prefix length comprising 256 contiguous Class C network blocks'.
Each RFC 1918 private IPv4 block aligns with a specific CIDR prefix and quantity of traditional classful networks: 10.0.0.0/8 represents one Class A block; 172.16.0.0/12 represents 16 contiguous Class B blocks (172.16.0.0 to 172.31.255.255); and 192.168.0.0/16 represents 256 contiguous Class C blocks (192.168.0.0 to 192.168.255.255).
Step-by-Step Solution
Key Concept
RFC 1918 Private IPv4 Address Space Specifications