Firewall protection is provided by different types of firewalls. One of the firewall types works at the session layer of the OSI model, or the TCP layer of the TCP/IP, and monitors CP handshaking between packets to determine whether a requested session is legitimate. This level hides information about the private networks they protect, but they do not filter individual packets. Identify the type of firewall described above.

A Stateful Multilayer Inspection Firewall B Application-Level Firewall C Circuit-Level Gateway Firewall D Packet Filtering Firewall