Which statement is correct regarding NBAR and NetFlow?

Question

Options

• ANetFlow uses five key fields for the flow.
• BNBAR examines data in Layers 3 and 4.
• CNetFlow examines data in Layers 3 and 4.
• DNBAR examines data in Layers 2 through 4.
• ENetFlow examines data in Layers 2 through 4.

• B
  6% (1)
• C
  6% (1)
• D
  12% (2)
• E
  76% (13)

Explanation

NetFlow is a passive technology that monitors network activity, typically from OSI Layers 2 NBAR is an active technology that can be used to validate or reclassify ToS marking based on packet inspection in Layers 3 through 7.

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