Which discovery category identifies perimeter devices and connections rather than internal hosts?

• A. Passive Discovery
• B. Active Discovery
• C. Edge Discovery
• D. Internal Discovery

Answer: (C)

Discovery categories describe what part of the network a discovery effort concentrates on. Perimeter devices sit at the boundary between your network and the outside world, and the connections crossing that boundary (like gateways, routers, firewalls, and external links) are the focus. Edge discovery targets these boundary devices and edge connections, which is why it best identifies the perimeter rather than internal hosts. Internal discovery, on the other hand, is about hosts inside the network. Passive discovery and active discovery describe methods of gathering data—observing traffic versus actively probing—but they don’t specifically designate boundary versus interior targets.