Management has decided that they want a high level of security. They do not want Internet
requests coming directly from users. Which of the following is the BEST recommendation?

A.
Content filter

B.
Proxy server

C.
Layer 3 switch

D.
Firewall

Explanation:
A proxy server is a server (a computer system or an application) that acts as an
intermediary for requests fromclients seeking resources from other servers.