Compare Optical fibers with copper wires
A. Optical fibers are heavier than copper wires
B. Copper wires can provide higher bandwidth
C. Optical fibers suffer from interference
D. Optical fibers are widely used for backbone networks
查看答案
For Shannon's Theorem:
A. It does not consider noise on the channel
B. It is more accurate more the Nyquist's Therom
C. it uses signal-to-noise ratio
D. It can only be applied on copper wires
If the baud rate is 1200 symbol per second and Quadrature Phase-shift Keying is used for modulation, please calculate the data rate:
A. 300 bps
B. 600 bps
C. 2400 bps
D. 4800 bps
The sequence number used in Protocol 3 can range between 0 and 1.
Procotol 3 uses timer and sequence number.
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