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單項(xiàng)選擇題

Which of these technologies is characterized as being a multipoint Layer 2 VPN that connects two or more customer devices using Ethernet bridging techniques?（）

A.DPT
B.MPLS
C.VPLS
D.CWDM
E. DWDM
F. SONET/SDH

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多項(xiàng)選擇題

Which two of these are characteristics of Metro Ethernet? （）

A. class of service
B. bandwidth profiles
C. user-network interface
D. Ethernet LAN circuit attributes
E. Ethernet virtual circuit attributes

多項(xiàng)選擇題

Which two of these Metro Internet services map to E-LAN services that are defined by the MEF?（）

A. Ethernet Private Line
B. Ethernet Wire Service
C. Ethernet Relay Service
D. Ethernet Multipoint Service
E. Ethernet Relay Multipoint Service

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