A company hosts its public websites internally. The administrator would like to make some
changes to the architecture.
The three goals are:
reduce the number of public IP addresses in use by the web servers
drive all the web traffic through a central point of control
mitigate automated attacks that are based on IP address scanning
Which of the following would meet all three goals?

A.
Firewall

B.
Load balancer

C.
URL filter

D.
Reverse proxy

Explanation:
The purpose of a proxy server is to serve as a proxy or middle man between clients and servers.
Using a reverse proxy you will be able to meet the three stated goals.