Which security tool monitors network traffic as it flows into and out of the organization and determines whether packets belong to an existing connection or are from an unauthorized source?

Which security tool monitors network traffic as it flows into and out of the organization and determines whether packets belong to an existing connection or are from an unauthorized source?

• web security appliance
• intrusion protection system
• application proxy
• stateful firewall

Explanation: A stateful firewall filters packets based on state information maintained in a state table. Because it uses state information, the stateful firewall can analyze traffic at OSI Layers 4 and 5.

Exam with this question: CCNA Security Chapter 4 Exam Answers