Port Address Translation of NAT allows several hundred workstations to access the internet with a single public internet address.
What do you mean by NAT?
Network address translation (NAT) is a method of mapping one IP address space to another by altering network address information in packet IP headers while they are being routed through a traffic routing device. When a network was moved or when the upstream Internet service provider was switched but could not route the network's address space, the technique was originally employed to avoid the requirement to assign a new address to every site.
Port Address Translation (PAT) is a Network Address Translation (NAT) extension that allows numerous LAN devices to be mapped to a single public IP address in order to save IP addresses.
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