What is a core function of a Network Intrusion Detection System (NIDS)?

What is a core function of a Network Intrusion Detection System (NIDS)?

• A. Detecting suspicious network activities
• B. Blocking unauthorized access attempts
• C. Encrypting data traffic
• D. Monitoring user activities

Answer: (A)

A core function of a Network Intrusion Detection System (NIDS) is detecting suspicious network activities. NIDS continuously monitors network traffic for signs of potential malicious activities, such as unusual data patterns, unauthorized access attempts, or known attack signatures. By analyzing this traffic, the system can alert administrators to potential threats, allowing them to take appropriate action to mitigate risks. While blocking unauthorized access attempts may seem related, this function is typically performed by a Network Intrusion Prevention System (NIPS), which actively takes measures to stop attacks in progress. Encryption of data traffic is not within the scope of what a NIDS does; it focuses primarily on identifying threats rather than securing data. Monitoring user activities, although valuable for security, does not encompass the primary function of NIDS, which centers on analyzing the network for inappropriate or harmful actions.

A core function of a Network Intrusion Detection System (NIDS) is detecting suspicious network activities. NIDS continuously monitors network traffic for signs of potential malicious activities, such as unusual data patterns, unauthorized access attempts, or known attack signatures. By analyzing this traffic, the system can alert administrators to potential threats, allowing them to take appropriate action to mitigate risks.

While blocking unauthorized access attempts may seem related, this function is typically performed by a Network Intrusion Prevention System (NIPS), which actively takes measures to stop attacks in progress. Encryption of data traffic is not within the scope of what a NIDS does; it focuses primarily on identifying threats rather than securing data. Monitoring user activities, although valuable for security, does not encompass the primary function of NIDS, which centers on analyzing the network for inappropriate or harmful actions.