FIGURE 5.4 Where to configure NAT
TABLE 5.1 Advantages and Disadvantages of Implementing NAT
Types of Network Address Translation
Static NAT This type of NAT is designed to allow one-to-one mapping between local and global addresses. Keep in mind that the static version requires you to have one real Internet IP address for every host on your network.
Dynamic NAT This version gives you the ability to map an unregistered IP address to a registered IP address from out of a pool of registered IP addresses. You don’t have to statically configure your router to map an inside to an outside address as you would using static NAT, but
you do have to have enough real, bona fide IP addresses for everyone who’s going to be sending packets to and receiving them from the Internet.