CCNA Cisco Certified Network Associate (#312)

Section: Version 2.0

Which three statements about DWDM are true? (Choose three)

It allows a single strand of fiber to support bidirectional communications
It is used for long-distance and submarine cable systems
It can multiplex up to 256 channels on a single fiber
It supports both the SDH and SONET standards
Each channel can carry up to a 1-Gbps signal
It supports simplex communications over multiple strands of fiber