Which Intrusion Detection System is best applicable for large environments where critical assets on the network need extra security and is ideal for observing sensitive network segments?

NIDS sensors are deployed at key network chokepoints - such as perimeter connections or sensitive internal segments - and analyze all traffic flowing through those points without per-host installation overhead. This architecture scales to large environments and enables focused observation of high-value network segments where critical assets reside. Because inspection occurs at the network layer, a single NIDS sensor can simultaneously detect threats targeting multiple systems on the monitored segment.

A Host-Based Intrusion Detection System (HIDS) is installed on individual endpoints and is better suited to monitoring a single critical server rather than observing traffic across large, multi-host network segments.

Firewalls enforce access control by filtering traffic according to rules but do not perform deep pattern-based inspection for intrusion signatures, making them insufficient as a standalone intrusion detection solution.

Honeypots are decoy systems intended to lure and study attackers but do not actively monitor or protect the sensitive production network segments where critical assets operate.