A network engineer is tasked with deploying a cost-effective solution to combine several channels of data for transmission over a single fiber optic link in a metropolitan area network. The channels are to be transmitted over distances not exceeding 80 kilometers without repeaters. Which technology should the engineer consider implementing?
Time-Division Multiplexing (TDM)
Multiprotocol Label Switching (MPLS)
Dense Wavelength Division Multiplexing (DWDM)
Fiber Channel over Ethernet (FCoE)
Coarse Wavelength Division Multiplexing (CWDM)
Optical Transport Network (OTN)