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多項選擇題

Which three of these are elements of the Cisco Unified Wireless Network architecture？（）

A.cell phones
B.remote access
C.mobility services
D.network management
E.network unification
F.network decentralization

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單項選擇題

Which of these is a Layer 2 transport architecture that provides packet-based transmission optimized for data based on a dual （counter-rotating） ring topology？（）

A.DTP
B.RPR
C.SDH
D.CWDM
E.DWDM

單項選擇題

Which of these Layer 2 access designs does not support VLAN extensions？（）

A.FlexLinks
B.loop-free U
C.looped square
D.looped triangle
E.loop-free inverted U