What does an IDS alerting to a malicious sequence of packets indicate?

• A. It confirms a successful breach.
• B. It may indicate a potential attack or a false positive.
• C. It signals that the network is now secure.
• D. It automatically blocks the traffic.

Answer: (B)

An IDS alert when it sees a sequence of packets that looks malicious means the system has detected traffic that matches a known attack pattern or deviates from normal behavior. It is a warning, not proof that a breach has occurred. The situation could be a real attack in progress, or it could be a false positive caused by unusual legitimate traffic, misconfiguration, or noisy data. The IDS’s role is to notify you so you can investigate using logs, packet captures, and correlation with other sensors to determine the actual risk. Blocking or enforcing defenses is typically handled by an IPS or firewall integration rather than by the IDS itself, which is usually a monitoring and alerting component. So the best interpretation is that it indicates a potential attack or a false positive, not a confirmed breach.