Network Address Translation

IP address depletion is a key problem facing the Internet. To help maximize the use of registered IP addresses, Cisco IOS Release 11.2 and later versions include software that implements Network Address Translation and Port Address Translation. This feature, which is the Cisco implementation of RFC 3022, Traditional IP Network Address Translator (Traditional NAT), provides a method for using the same IP addresses in multiple internal stub networks, thereby reducing the need for registered IP addresses.

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