单项选择题
A.NetFlow uses five key fields for the flow
B.NBAR examines data in Layers 3 and 4
C.NetFlow examines data in Layers 3 and 4
D.NBAR examines data in Layers 2 through 4
E.NetFlow examines data in Layers 2 through 4
单项选择题 When BGP tuning is used, how is packet flow into the e-commerce module controlled?（）
单项选择题 Whichofthesestatementsistrueofclientlessend-userdevices？（）
单项选择题 To securely transport EIGRP traffic, a network administrator will build VPNs between sites. What is the best method to accomplish the transport of EIGRP traffic?（）