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To secure his company's network, Tim the network admin, installed a security device that inspected all inbound and outbound network traffic for suspicious patterns. The device was configured to alert him if it found any such suspicious activity. Identify the type of network security device installed by Tim?
Correct Answer: D
The network security device described is an Intrusion Detection System (IDS). An IDS monitors all inbound and outbound network traffic for suspicious patterns and is configured to alert the network administrator if it detects any such activity. This aligns with the primary function of an IDS, which is to serve as a monitoring system, not necessarily to block traffic like a firewall or act as a decoy like a honeypot. It differs from a proxy server, which would primarily manage and forward web requests on behalf of clients. The IDS operates by analyzing traffic and identifying potential threats based on known signatures or anomalies in network behavior, thereby enabling the network admin to take appropriate action to secure the network12. References: The explanation provided is based on standard network security practices and the functionalities of an Intrusion Detection System (IDS) as outlined in network security resources. For detailed and specific references, please consult the latest Certified Network Defender (CND) study materials and documents provided by the EC-Council.