You are the network consultant from Cisco.com. Please point out two statements correctly describe an IPS device？（）

• A、 It resembles a Layer 2 bridge.
• B、 Traffic flow through the IPS resembles traffic flow through a Layer 3 router.
• C、 Inline interfaces which have no IP addresses cannot be detected.
• D、 Malicious packets that have been detected are allowed to pass through， but all subsequent traffic is blocked.