Which of the following network devices uses NAT to convert private IP addresses into public IP addresses?

Which of the following network devices uses NAT to convert private IP addresses into public IP
addresses?

A.
NAS

B.
Firewall

C.
Hub

D.
Bridge

Explanation:

http://superuser.com/questions/409404/why-do-we-have-nat-if-we-could-just-assign-apublic-ip-address