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

Honeypots are deception-based traps designed to lure and study attackers - they are not intrusion detection systems and do not monitor or protect production network segments.

Firewalls enforce access control policies by allowing or denying traffic - they are perimeter controls, not intrusion detection systems, and do not analyze traffic for attack patterns.

NIDS sensors are deployed at strategic points on the network - such as in front of critical segments - and analyze all passing traffic without requiring installation on individual hosts. This passive, network-wide visibility makes NIDS the best fit for large environments where protecting sensitive segments is the priority.

HIDS is installed on individual hosts and monitors local activity such as file changes and system calls - it lacks the network-wide visibility needed to observe traffic across large or sensitive network segments.