NAT (Network Address Translation)
NAT or Network Address Translation is a method of translating an IP address in one network to
an IP local to another network. In this particular context NAT is typically used to translate private non-routable address to a public routable address usually provided by your ISP. This means that while you may have a number of real computers in your internal network it appears as if there is only one device connected to the Internet.
For this document I have assumed all NAT will be dynamic in nature and no static NAT will be set up. See
"
Static NAT Adds No Security" for more details.
Non-Routable Addresses
Non-Routable addresses AKA "RFC 1597" are addresses that Internet Assigned Numbers Authority (IANA) has set aside for use in internal networks. As such none of these addresses are assigned to public networks and can be
used by any organization that wants to use them. The IP ranges provided by RFC 1597 are as follows:
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
For a complete terminology dictionary please visit
www.whatis.com