White Paper - Increasingly, network operators adopt flow-based technologies such as NerFlow, sFlow, J-Flow, adn IPFIX to gain visibility inbto their networks devices. However, flow-bawed solutions alone are often insufficient to solve specfic end-user problems, and they may even strain networks with the additional data they generate. Flow-level data is great for trending, high-level analysis, and some troubleshooting. However, access to packet data is required for detailed visibility into applications performance, capacity planning, security threats, and end-user experience.