Your client tells you they know beyond a doubt that an attacker is sending messages back and forth from their network, yet the IDS doesn't appear to be alerting on the traffic. Which of the following is most likely true?

Answer

i$)$ The attacker has configured a trunk port on a switch

$.$ii$)$ The attacker has corrupted ACLs on every router in the network.

iii$)$ The attacker has set up port security on network switches

iv$)$ The attacker is sending messages over an SSL tunnel.