What is the main advantage that a network-based IDS/IPS system has over a host-based solution?

A network-based IDS operates as a standalone appliance or dedicated sensor that passively monitors a network segment, placing zero processing or memory burden on the endpoint hosts being protected. This is the primary operational advantage over host-based IDS, which must share resources with the applications running on the monitored system.

While network-based IDS can be positioned at perimeter boundaries, it cannot inspect encrypted traffic payloads without decryption capability, and host-based IDS can inspect traffic after it is decrypted on the endpoint.

Network-based IDS solutions often require complex tuning, signature management, and network tap or SPAN port configuration, making them no simpler to install than host-based agents.

Network-based IDS runs on a separate appliance entirely and would not interact with end-user interfaces regardless, making this a trivial distinction rather than a meaningful advantage.