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

An Intrusion Detection System (IDS) is designed to monitor network or system activities for malicious actions or policy violations. The correct order of activities that an IDS follows to detect an intrusion starts with Intrusion Monitoring, where it observes the network traffic or system events. Following this, Intrusion Detection takes place, where the IDS analyzes the monitored data to identify potential security breaches. Once a potential intrusion is detected, the Response mechanism is activated to address the intrusion, which may include alerts or automatic countermeasures. Finally, Prevention is applied to improve the system’s defenses against future intrusions based on the detected patterns and responses.

References: This explanation is based on the standard operational procedure of IDS as per the Network Defender (CND) objectives and documents1.

In the context of network sniffing, promiscuous mode is a specific setting for a network interface controller (NIC) that allows the NIC to pass all traffic it receives to the central processing unit, rather than just the frames that the NIC is specifically programmed to receive. This mode is essential for network sniffers, as it enables them to capture all network traffic, including packets not addressed to the NIC’s MAC address. When a NIC is not in promiscuous mode, it will ignore packets not intended for its MAC address.

References: The explanation provided aligns with standard networking practices and the information available from various security resources, including the Information Security Stack Exchange1 and TechTarget2. These sources confirm the role of promiscuous mode in enabling a network device to intercept and read all network packets that arrive, which is necessary for the operation of network sniffers.

An “attack” in the context of network security is represented by a combination of a motive or goal, the method used to carry out the attack, and a vulnerability that can be exploited. The motive is the attacker’s reason for conducting the attack, which could range from financial gain to espionage. The method refers to the technique or strategy the attacker uses to exploit a vulnerability. Finally, the vulnerability is a weakness in the system that allows an attacker to breach security measures. This representation aligns with the principles of risk assessment and threat modeling, which are critical components of network defense.

References: The explanation provided is based on standard network security practices and the Certified Network Defender (CND) curriculum, which emphasizes understanding the elements of an attack to effectively defend against them12.