Using Network Address Translation(NAT)for Internet

Network Address Translation(NAT) is not only a kind of important technology to solve the problems of the scarcity about IP addresses in IPV4 format,but it is a very practical technology as well.By using NAT technology and a few legal and available Internet IP addresses,we can make a lot of computers with private IP addresses in a unit or department browse Internet,which can expand capability to link Internet,effectively solve the problems about the scarcity of IP addresses and have better security.The authors have implemented a small campus network to link Internet by using NAT technology and computer network legal IP addresses.This is a model case to establish a web site of a branch.