CompTIA Network+ (N10-008) — Question 108

A systems administrator is configuring a firewall using NAT with PAT. Which of the following would be BEST suited for the LAN interface?

Answer options

• A. 172.15.0.0/18
• B. 172.18.0.0/10
• C. 172.23.0.0/16
• D. 172.28.0.0/8
• E. 172.32.0.0/14

Correct answer: C

Explanation

The correct answer is C, 172.23.0.0/16, as it falls within the private IP address ranges defined by RFC 1918, making it suitable for a LAN interface. The other options, while they are private addresses, do not align as well with typical subnetting practices for LAN interfaces, especially considering the size and structure needed for NAT with PAT.