單項(xiàng)選擇題In optical transmission systems, chirped lasers are used for the purpose of:().

A.Turning the laser to a specific ITU channel
B.Keeping the signal wavelength "locked" to a specific technology
C.Suppressing FWM and SBS non-linear effects
D.None ofthe above


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1.單項(xiàng)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

4.單項(xiàng)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

5.單項(xiàng)選擇題What is TCI?()

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