What it solves
Dependency map
Automatic discovery of which application talks to which service, server and network segment.
Change impact
Before touching a switch or powering down a server, know exactly which applications are affected.
Faster diagnosis
During an incident, the map shows the whole chain: from the user's complaint to the component that is failing.
Vantage — flow sensor
The standard sensor: one per segment or site.
Vantage Deep — full packet capture
For critical points: full packet capture, not deployed en masse.