Port Address Translation (PAT) is a derivative of dynamic NAT, in that there is no static mapping of private IP addresses to a public IP address. With PAT (also referred to as NAT Overload), all devices share a single public IP address.
Figure 7.33 is the same screenshot as we have just seen. We are going to use that for this explanation:
Figure 7.33: Networking with NAT
PC 1 wants to communicate with a website. The NAT process that is followed is as follows:
- PC 1 opens up a network port to communicate to the web server. For this example, it opens port 64001.
- PC 1 sends the data to the router.
- The router updates its ...
