The these concepts are central to Network Visibility:

• Network Visibility can identify two types of performance bottlenecks: 
  • Network-performance bottlenecks 
  • App/Network-interaction bottlenecks (for example, how an application tier or node uses network resources)
• The Network Dashboard shows the network-level view of a monitored application. You can quickly identify network elements with performance issues (red/yellow links or tiers), view Key Performance Indicators for each network element, and troubleshoot individual elements (right-click an element and select View Metrics).
• Network Agents can detect load balancers and TCP endpoints, which appear in network flow maps (but not application flow maps), and sometimes function as traffic sources and destinations.
• Network Visibility can collect metrics for individual application flows, TCP connections, and network links.
• To support in-depth troubleshooting, you can configure Network Agents to collect detailed diagnostic metrics for nodes and connections with performance issues.