Which two statements are true about optical networks? (Choose two.)
A. SONET and SDH both use time-division multiplexing.
B. An optical transport network system uses time-division multiplexing.
C. SONET and SDH both use wavelength-division multiplexing.
D. An optical transport network system uses wavelength-division multiplexing.
Answer:A
Which two statements are true about optical networks? (Choose two.)
A. SONET and SDH both use time-division multiplexing. B. An optical transport network system uses time-division multiplexing. C. SONET and SDH both use wavelength-division multiplexing. D. An optical transport network system uses wavelength-division multiplexing.