SOLVED : articlewritingcafe.net –

How does DSL (digital subscriber line) work?

. Of the different types of multiplexing, what distinguishes 

(a) Frequency division multiplexing

(FDM)? 

(b) Time-division multiplexing (TDM)? 

(c) Statistical time-division multiplexing (STDM)?

(d) Wavelength division multiplexing (WDM)