29. The type of light source and fiber chosen for FDDi networks are: Multimode and 1300 nm LEDs Multimode and 1300 nm lasers Single mode and 1300 nm lasers Single mode and 1550 nm lasers 30.Determine the minimum bandwidth required to achieve a Eb / No of 14 dB for an 8-PSK system operating at 20 Mbps with a C/N of 11 dB. 50.25 MHz 60 MHz 45 MHz 40 MHz