312-38 Exam Dumps : Certified Network Defender (CND)

The last step Malone should list in his incident handling plan is ‘A follow-up’. This step is crucial as it involves analyzing the incident to understand how it occurred and what can be done to prevent similar incidents in the future. It often includes a review of the effectiveness of the response, identification of lessons learned, updating policies and procedures accordingly, and conducting training sessions if necessary. This step ensures that the organization improves its security posture and is better prepared for future incidents.

References: The follow-up step is aligned with the incident response life cycle which includes preparation, identification, containment, eradication, recovery, and then follow-up as the final phase. This is consistent with the best practices in incident response and is covered in the Certified Network Defender (CND) curriculum as well as in the NIST guidelines on incident response1.

The presence of packets with FIN, PUSH, and URG flags activated in network traffic, as observed through Wireshark, is indicative of a XMAS scan. This type of scan is used by attackers to identify open ports and services available on a networked computer. The peculiar combination of these TCP flags is not used in normal, everyday communications and is easily picked up by intrusion detection systems as anomalous. The XMAS scan derives its name from the fact that the packet lights up like a Christmas tree with several flags set, which is an unusual and conspicuous event in network traffic.

References: The characteristics of a XMAS scan and the use of these specific TCP flags are documented in network security literature and align with the Certified Network Defender (CND) course materials, which cover network scanning techniques and their identification123.

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.