Which of the following communication technologies would MOST likely be used to increase bandwidth over an existing fiber optic network by combining multiple signals at different wavelengths?
A . DWDM
B . SONET
C . ADSL
D . LACP
Answer: A
Explanation:
Dense wavelength-division multiplexing (DWDM) is a high-speed optical network type commonly used in MANs (metropolitan area networks).DWDM uses as many as 32 light wavelengths on a single fiber, where each wavelength can support as many as 160 simultaneous transmissions using more than eight active wavelengths per fiber.