Answer:
Dynamic NAT
Step-by-step explanation:
For this network, you need to implement a Dynamic NAT. This is the perfect solution since it sends all of the information from different zones and subnets within a local private network over a single outside public IP address. This will solve the issue of "your" ISP only providing a single IP address. It will also prevent any outside external hosts from accessing any of the internal devices in the network since they will not have a registered unique IP address.