Firewalk tool employs a technique to determine the ___________ rules in place on the ___________ forwarding device.

Firewalk tool employs a technique to determine the ___________ rules i

1.	Firewalk tool employs a technique to determine the ___________ rules in place on the ___________ forwarding device.
A.	filter, packet
B.	filter, port
C.	routing, packet
D.	routing, port
Answer» B. filter, port