What technique is used with UTP cable to help protect against signal interference from crosstalk?
answer
twisting the wires together into pairs
question
A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption?
answer
1. RFI
2. EMI
question
Which characteristic describes crosstalk?
answer
the distortion of the transmitted messages from signals carried in adjacent wires
question
Refer to the exhibit. What is wrong with the displayed termination?
answer
The untwisted length of each wire is too long.
question
Which type of connector does a network interface card use?
answer
RJ-45
question
single-mode fiber
answer
1. laser as light source
2. only one ray of light into the fiber
3. generally used for campus backbone
question
multimode fiber
answer
1. generally used with LANs
2. several paths of light into the fiber
3. LED as light source
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