Which configuration would be appropriate for a small business that has the public IPv4 address 209.165.200.225/30 assigned to the external interface on the router that connects to the internet?

Which configuration would be appropriate for a small business that has the public IPv4 address 209.165.200.225/30 assigned to the external interface on the router that connects to the internet?

• access-list 1 permit 10.0.0.0 0.255.255.255
  ip nat pool NAT-POOL 192.168.2.1 192.168.2.8 netmask 255.255.255.240
  ip nat inside source list 1 pool NAT-POOL
• access-list 1 permit 10.0.0.0 0.255.255.255
  ip nat pool NAT-POOL 192.168.2.1 192.168.2.8 netmask 255.255.255.240
  ip nat inside source list 1 pool NAT-POOL overload
• access-list 1 permit 10.0.0.0 0.255.255.255
  ip nat inside source list 1 interface serial 0/0/0 overload
• access-list 1 permit 10.0.0.0 0.255.255.255
  ip nat pool NAT-POOL 192.168.2.1 192.168.2.8 netmask 255.255.255.240
  ip nat inside source list 1 pool NAT-POOL overload
  ip nat inside source static 10.0.0.5 209.165.200.225

Explanation: With the ip nat inside source list 1 interface serial 0/0/0 overload command, the router is configured to translate internal private IPv4 addresses in the range 10.0.0.0/8 to a single public IPv4 address, 209.165.200.225/30.
The other options will not work because the IPv4 addresses defined in the pool, 192.168.2.0/28, are not routable on the internet.

Exam with this question: 6.8.4 Module Quiz - NAT for IPv4