What are three valid methods of gathering information about an existing data network? (Choose three.)

A.
Use organizational input.

B.
Perform a traffic analysis.

C.
Analyze the user-mapping of a running application.

D.
Perform a packet-level audit to verify carrier service guarantees.

E.
Perform a network audit to gather more detail about the network.

F.
Use reports that analyze the metrics of the customer’s existing network.