Which statement describes an operational characteristic of NetFlow?

• NetFlow collects basic information about the packet flow, not the flow data itself.
• NetFlow captures the entire contents of a packet.
• NetFlow flow records can be viewed by the tcpdump tool.
• NetFlow can provide services for user access control.

Explanation: NetFlow does not capture the entire contents of a packet. Instead, NetFlow collects metadata, or data about the flow, not the flow data itself. NetFlow information can be viewed with tools such as nfdump and FlowViewer.