超星 - Unit 4 Text A: Five reasons why fiber is the way o

单选题

Who would benefit from the advantages of fiber optics ( )?

A. Network architects
B. Soldier
Chef
Driver

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单选题

Electricity is applied to one end of the wires and it travels to the far end where it is received as a ( )?

A. voice.
B. information.
C. data
D. signal.

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单选题

Please select the correct statement which mention on the below ( )?

A. light travels a lot further than the constant EMP waves.
B. light degrades much higher than electricity does.
C. light upgrades much slower than electricity does.
D. the constant EMP waves travels a lot further than light.

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The reason why wires melting into a fine slag and becoming useless is ( ).

A. High temperature.
B. Over use.
C. Wire aging.
D. A, B and C.

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Metal wires are already nearing their physical potential due to the ( ) caused by data transmissions.

A. Magnetic field
B. Heat.
C. Type of wires.
D. Wire material

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单选题

Why the fiber optic networks of DSL and/or cable providers actually go within a mile or so of many of the customers they serve. ( ).

A. Because they know that fiber optics are the most cost effective solution.
Because they know that by putting fiber close to the homes and businesses that they serve is good chance.
C. Because they know that they stand a very good chance of making the transition to an all-fiber network that much easier.
D. A, B and C.

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单选题