(d -nam ik nat) (n.)
A type of NAT
in which a private IP address
is mapped to a public IP address drawing from a pool of registered (public) IP addresses. Typically, the NAT router
in a network
will keep a table of registered IP addresses, and when a private IP address requests access to the Internet
, the router chooses an IP address from the table that is not at the time being used by another private IP address. Dynamic NAT helps to secure a network as it masks the internal configuration of a private network and makes it difficult for someone outside the network to monitor individual usage patterns. Another advantage of dynamic NAT is that it allows a private network to use private IP addresses that are invalid on the Internet but useful as internal addresses.
Compare with static NAT.