T/F: The snippet below is a Dynamic NAT configuration command.

R1# show running-config
interface GigabitEthernet0/0
ip address 192.168.1.3 255.255.255.0
ip nat inside
interface Serial0/0/0
ip address 100.1.1.249 255.255.255.252 ip nat outside
ip nat inside source list 1 interface Serial0/0/0 overload
access-list 1 permit 192.168.1.2
access-list 1 permit 192.168.1.1

(A) TRUE
(B) FALSE

FALSE

The configuration above is a PAT configuration not Dynamic NAT. Port Address Translation (PAT) is another type of dynamic NAT that can map multiple private IP addresses to a single public IP address by using a technology known as Port Address Translation.

Here, when a client from inside network communicates to a host on the internet, the router changes the source port (TCP or UDP) number with another port number. These port mappings are kept in a table. When the router receives from the internet, it will refer to the table which keeps the port mappings and forward the data packet to the original sender. The following checklist details the configuration when using an interface IP address as the sole inside global IP address:

1. As with dynamic and static NAT, configure the ip nat inside interface subcommand to identify inside interfaces.
2. As with dynamic and static NAT, configure the ip nat outside interface subcommand to identify outside interfaces.
3. As with dynamic NAT, configure an ACL that matches the packets entering inside interfaces.
4. Configure the ip nat inside source list acl-number interface type/number overload global configuration command, referring to the ACL created in step 3 and to the interface whose IP address will be used for translations.