While conducting a penetration test, the tester determines that there is a firewall between the tester’s machine and the target machine. The firewall is only monitoring TCP handshaking of packets at the session layer of the OSI model.
Which type of firewall is the tester trying to traverse?
A . Packet filtering firewall
B . Application-level firewall
C . Circuit-level gateway firewall
D . Stateful multilayer inspection firewall
Answer: C