Which three statements about DWDM are true? (Choose three)
A. It allows a single strand of fiber to support bidirectional communications
B. It is used for long-distance and submarine cable systems
C. It can multiplex up to 256 channels on a single fiber
D. It supports both the SDH and SONET standards
E. Each channel can carry up to a 1-Gbps signal
F. It supports simplex communications over multiple strands of fiber
DWDM circuits are used in all modern submarine communications cable systems and other long-haul circuits.
Specifically, DWDM
Enables bidirectional communications over one strand of fiber
Assigns incoming optical signals to specific wavelengths of light (i.e., frequencies)
Each channel is capable of carrying a 10-Gbps multiplexed signal
Can multiplex more than 80 different channels of data (i.e., wavelengths) onto a single fiber
Can amplify these wavelengths to boost the signal strength
Supports SONET and SDH standards
CCNA curriculum ABD
Why the submarine cable answer is wrong!
The submarine cable answer is wrong. Do not use.
C. It can multiplex up to 256 channels on a single fiber
D. It supports both the SDH and SONET standards
E. Each channel can carry up to a 1-Gbps signal
the same question 68
XXX WRONG ANSWERXXX
A B D
Enables bidirectional communications over one strand of fiber.
Supports SONET and SDH standards
It is used for long-distance and submarine cable system