單項選擇題You are the Cisco Network Designer in Cisco.com. Which statement is correct regarding NBAR and NetFlow?()

A. NBAR examines data in Layers 1 and 4.
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.


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2.單項選擇題Why is STP required when VLANs span access layer switches?()

A.to ensure a loop-free topology
B.to protect against user-side loops
C.in order to support business applications
D.because of the risk of lost connectivity without STP
E.for the most deterministic and highly available network topology

4.單項選擇題What is a virtual firewall?()

A.another name for a firewall deployed in routed mode
B.another name for a firewall deployed in transparent mode
C.a separation of multiple firewall security contexts on a single firewall
D.a firewall that, when deployed in routed mode, can support up to 1000 VLANs per context
E.a firewall that has multiple contexts, all of which share the same policies (such as NAT and ACLs)

5.多項選擇題In which two locations in an enterprise network can an IPS sensor be placed?()

A.bridging VLANs on two switches
B.bridging two VLANs on one switch
C.between two Layer 2 devices with trunking
D.between two Layer 2 devices without trunking
E.between a Layer 2 device and a Layer 3 device with trunking

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