EC0-350 Free Dumps Study Materials
Question 14: Mark works as a contractor for the Department of Defense and is in charge of network security.
He has spent the last month securing access to his network from all possible entry points. He has
segmented his network into several subnets and has installed firewalls all over the network. He
has placed very stringent rules on all the firewalls, blocking everything in and out except ports
that must be used. He does need to have port 80 open since his company hosts a website that
must be accessed from the Internet. Mark is fairly confident of his perimeter defenses, but is still
worried about programs like Hping2 that can get into a network through covert channels. How
should mark protect his network from an attacker using Hping2 to scan his internal network?
A.Block ICMP type 13 messages
B.Block all incoming traffic on port 53
C.Block all outgoing traffic on port 53
D.Use stateful inspection on the firewalls
Correct:A