Your customer is concerned about security. He wants to make certain no one in the outside world
can see the IP addresses inside his network. What feature of a router would accomplish this?

A.
Port forwarding

B.
NAT

C.
MAC filtering

D.
Firewall

Explanation:
One purpose of Network Address Translation (NAT) is to hide internal IP addresses,
only exposing the router’s IP address to the outside
world.