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.
查看答案
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.
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
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.
What isn’t the benefit which fiber optics bring to us ( ).
A. Green
B. Easy to upgrade
C. None signal degradation
D. More untapped overhead
微信支付 
支付宝支付