Answer:
Block ICMP at the firewall bc then it would stop all ping sweeps .
Explanation:
A network technician tries to protect IP-based network from an invader attempting to find them in the DMZ server. The technician should protect the network against ping sweeps to prevent ICMP at the bc firewall, then prevent all ping sweeps. It is necessary to block ICMP at bc firewall so all ping sweeps would quit by him.
