Full Packet Capture (FPC)
Captures the entire packet, including the header and the payload for all traffic entering and leaving a network
Flow Analysis
Relies on a flow collector, which records metadata and statistics rather than recording each frame that passes through the network
Does not provide the payload of the packets
NetFlow
A Cisco-developed means of reporting network flow into a structed database
IP Flow Information Export (IPFIX)
Defines traffic flows based on shared packet characteristics
Zeek
Passively monitors a network like a sniffer, but only logs full packet capture for packets of potential interest
All data is stored as JSON files
Multi Router Traffic Grapher (MRTG)
Creates graphs showing traffic flows through the network interfaces of routers and switches by polling the appliances using SNMP