Which of the following types of Network Address Translation (NAT) uses a pool of public IP
addresses?
A.
Static NAT
B.
Port Address Translation (PAT)
C.
Dynamic NAT
D.
Cache NAT
Explanation:
Dynamic Network Address Translation (NAT) uses a pool of public IP addresses.
Dynamic NAT is a technique that maps an unregistered IP address to a registered IP address from a
group of registered IP addresses. It also establishes a one-to-one mapping between unregistered
(private) and registered (public) IP addresses, but the mapping varies depending on the registered
address available in the IP address pool at the time of connection.Answer A is incorrect. Static NAT performs a manual translation of one IP address to a different one.
Static NAT is typically used to translate the destination IP address in packets that reach to the
translation device (such as a router) for LAN. In static translation type, a manual translation is
performed between two addresses and possibly port numbers.Answer B is incorrect. Port Address Translation (PAT) is also a type of NAT. This type of NAT is used
in home networks that are using DSL or cable modems. It is designed to provide Internet access to
many internal users through one external address.Answer D is incorrect. There is no such type of NAT as Cache NAT.