NAT example
http://technet.microsoft.com/en-us/library/cc780783(WS.10).aspx then network address translation (NAT) maps all private addresses on 192.168.0.0 to the IP address of w1.x1.y1.z1. If multiple private addresses are mapped to a single public address, NAT uses dynamically chosen TCP and UDP ports to distinguish one intranet location from another. Note The use of w1.x1.y1.z1 and w2.x2.y2.z2 is intended to represent valid public IP addresses as allocated by the Internet Assigned Numbers Authority (IANA) or an ISP. The following illustration shows an example of using NAT to transparently connect an intranet to the Internet. If a private user at 192.168.0.10 uses a Web browser to connect to the Web server at w2.x2.y2.z2, the user's computer creates an IP packet with the following information: Destination IP address: w2.x2.y2.z2 Source IP address: 192.168.0.10 Destination port: TCP port 80 Source port: TCP port 5000 This IP packet is then forwarded to the NAT protocol, which translates the ...