To investigate the reputation of an IP address, which resource can a security analyst utilize?

Investigating the reputation of an IP address is crucial for security analysts to assess potential threats and malicious activities. AbuseIPDB is a database that specifically focuses on the reporting and tracking of abusive IP addresses. By utilizing this resource, an analyst can check if an IP address has been reported for malicious activities such as spamming, hacking attempts, or other abusive behaviors. This information helps in determining whether to block, investigate, or allow traffic from that IP address.

In contrast, Network Access Control (NAC) is primarily used for enforcing security policies on devices trying to access the network rather than directly analyzing IP reputation. Security Information and Event Management (SIEM) systems aggregate and analyze security events and logs, providing a broader view of security incidents rather than focusing solely on the reputation of an individual IP. Intrusion Detection Systems (IDS) are designed to monitor network traffic for signs of unauthorized access or attacks but do not specifically provide reputation data for IP addresses. Thus, for the specific purpose of checking an IP’s reputation, AbuseIPDB stands out as the most relevant tool.