What is the result of configuring a NAT router to use static address mapping?

Configuring a NAT (Network Address Translation) router to use static address mapping means that specific internal IP addresses are always translated to the same external IP address. This approach is typically used for services that need a consistent IP address, such as servers hosting applications or websites.

Since static mapping requires each internal address to map to a specific external address, the organization must allocate a sufficient number of public—or registered—IP addresses to cover the number of devices that will need to be reachable from the outside. This setting prevents the efficient conservation of IP addresses, as each internal host may require its own static external counterpart. Therefore, an organization implementing this approach would indeed require a larger pool of registered IP addresses compared to dynamic address assignment methods, where fewer addresses can suffice for many devices due to their intermittent sessions with the internet.

Utilizing static address mapping does not inherently save IP addresses nor does it lead to invisibility on the internet; instead, it exposes assigned internal services to the external network with a fixed public facing address. Additionally, while static mappings could impact connection times due to the predictable addressing, they primarily serve a different purpose and aren't designed with speed enhancements in mind.