Address translation has become a staple of enterprise networking,and its develop-
ment has allowed users of the Internet to forestall its collapse under the weight of
the explosion of Internet devices and the basic limitation of IPv4 addresses.
Network Address Translation (NAT) has become one of the most common fire-
wall functions,and its simplicity has allowed the number of devices that can use the
Internet to expand exponentially.It is the one key function that has provided home
users with the capability to allow every member of a household to have his or her
own computer and share a single Internet connection from a broadband ISP ...
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