Enumerate the concept of IP address
The router must have an IP address of the same network (194.62.15.x in this case) for the convenience of the entire network to use the services of the router. The NAT router also has a separate IP address that would be used for external communication through the Internet. Note that all IP addresses are unique and any duplication would result in collision. For example, a NAT router may have IP address of 194.62.15.2 for internal use and 202.63.10.15 for external or public (or Internet or ISP) IP address.