Which two statements about NetFlow support on Cisco IOS XR are true? (Choose two.)
A. Cisco IOS XR supports NetFlow version 9 export format only.
B. NetFlow version 9 is a flexible and extensible means to carry NetFlow records from a network node to a collector.
C. IP flow is based on a set of four parameters only (source IP address, destination IP address, source port, and destination port).
D. A NetFlow flow is the bidirectional sequence of packets on a single interface.
