單項選擇題What layer of the TMN (telecommunications management network) model does CTM fit into?()

A.Network management layer
B.Element management layer
C.Business management layer
D.Network element layer


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3.單項選擇題What is the statistical reserve?()

A.Bandwidth that is reserved for SVCs to route over a trunk
B.Bandwidth that is reserved on a trunk so that ABR connections can burst
C.Bandwidth on a trunk that is reserved for control traffic and cannot be used by connections
D.Bandwidth that cannot be allocated to connections but can be used to accommodate statistical variations in the traffic

4.單項選擇題What is TCI?()

A.Tag Calling Interface
B.Tag Control Identifier
C.ToS Class Interface
D.Tag Control Information