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TCP/IP Guide by Charles M. Kozierok

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Chapter 28. IP NETWORK ADDRESS TRANSLATION (NAT) PROTOCOL

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To help extend the life of the Internet Protocol version 4 (IPv4) addressing scheme while the newer IPv6 protocol is developed and deployed, other technologies have been developed. One of the most important of these is IP Network Address Translation (NAT). This technology allows a small number of public IP addresses to be shared by a large number of hosts using private addresses. This essential work-around allows the global Internet to actually have far more hosts on it than its address space would normally support. At the same time, it provides some security benefits by making hosts more ...

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