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單項(xiàng)選擇題

Which technology is an example of the need for a designer to clearly define features and designedperformance when designing advanced WAN services with a service provider?()

A. FHRP to remote branches.
B. Layer 3 MPLS VPNs routing.
C. Control protocols (for example Spanning Tree Protocol) for a Layer 3 MPLS service.
D. Intrusion prevention, QoS, and stateful firewall support network wide.

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