Final answer:
The organization has likely implemented Network Address Translation (NAT), allowing multiple devices to communicate with the internet using a single public IP address. NAT is common in both home and business networks to efficiently use IP addresses and enhance security.
Step-by-step explanation:
If an organization has designed their network such that internal computers share one public IP address, they have most likely implemented a system known as Network Address Translation (NAT). NAT is a method that enables multiple devices on a local network to communicate with the internet using a single public IP address. NAT works by translating the private IP addresses used within the internal network to the organization's public IP address for outgoing traffic, and then reversely for incoming traffic.
This allows for efficient use of IP addresses, enhanced security by hiding internal network structure, and the ability to work around the limited number of available public IP addresses. It is a common feature in routers and is widely used in home and business networks alike. Without NAT, each device would require its own unique public IP address, which is not practical given the finite number of IPv4 addresses available.