What is the range of the dynamic NAT pool used for public addresses as described in the NAT configuration example?

• A. 192.31.7.129-192.31.7.144
• B. 192.31.7.100-192.31.7.150
• C. 192.31.7.1-192.31.7.16
• D. 192.31.7.255-192.31.7.270

Answer: (A)

Dynamic NAT relies on a pool of public IP addresses that are allocated to internal hosts as they need translation. The pool must have enough usable addresses to cover the number of internal destinations that might be translated at the same time. In the given NAT setup, the pool spans 192.31.7.129 to 192.31.7.144, which gives 16 usable addresses. That size is chosen to support up to 16 simultaneous translations, matching the scenario described in the example. This range stays within the public address space and avoids nonusable addresses, making those IPs suitable for NAT use.

Other ranges either don’t align with the example’s intended pool size or include addresses that aren’t appropriate for a NAT pool (for instance, ranges that aren’t within the allocated public block or that would include nonusable addresses).