Which type of firewall makes use of a server to connect to destination devices on behalf of clients?

Which type of firewall makes use of a server to connect to destination devices on behalf of clients?

• packet filtering firewall
• proxy firewall
• stateless firewall
• stateful firewall
  

  Answers Explanation & Hints: An application gateway firewall, also called a proxy firewall, filters information at Layers 3, 4, 5, and 7 of the OSI model. It uses a proxy server to connect to remote servers on behalf of clients. Remote servers will see only a connection from the proxy server, not from the individual clients.