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What is Network Address Translation ?

What is Network Address Translation ( NAT ) ?

Network Address Translation is a process that enables a single device such as router / firewall to act as an agent between internet / public network and local or private network.

This agent is realtime translate the source ipaddress ( usually IP address ) to a different ip address as it leaves another interface ( usually the interface connected to the ISP and the internet )

This enables a single public address to represent a significantly larger number of private address.
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