Final answer:
NAT overloading, also known as network address translation with port address translation (PAT), uses port numbers to track multiple internal hosts that use one inside global address.
Step-by-step explanation:
NAT overloading, also known as network address translation with port address translation (PAT), uses port numbers to track multiple internal hosts that use one inside global address. PAT is a technique commonly used by home routers that allows multiple devices on a local network to share a single public IP address. When traffic from different internal hosts is sent out over the internet, PAT assigns a unique port number to each connection, which helps map the responses back to the correct internal host.