![]() ![]() ![]() This translates to one usable real IP address - 200.2.2.1 - configured on our router's serial interface. The diagram below represents our example network which consists of a number of internal clients and a router connected to our ISP via its serial interface. If you would like to know more about the NAT theory, be sure to read our popular NAT articles, which explain in great depth the NAT functions and applications in today's networks. NAT overload is the most common operation in most businesses around the world, as it enables the whole network to access the Internet using one single real IP address. The following steps explain basic Cisco router NAT Overload configuration. Other benefits of NAT include security and economical usage of the IP address ranges at hand. ![]() For example a complete network with 100 hosts can have 100 private IP addresses and still be visible to the outside world (internet) as a single IP address. The main purpose of NAT is to hide the IP address (usually private) of a client in order to reserve the public address space. NAT Overload, also known as PAT (Port Address Translation) is essentially NAT with the added feature of TCP/UDP ports translation. NAT (Network Address Translation) is a method that allows the translation (modification) of IP addresses while packets/datagrams are traversing the network. ![]()
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