Chapter 2

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?

1. RFI 2. EMI

multimode fiber

1. generally used with LANs 2. several paths of light into the fiber 3. LED as light source

single-mode fiber

1. laser as light source 2. only one ray of light into the fiber 3. generally used for campus backbone

Which type of connector does a network interface card use?

RJ-45

Refer to the exhibit. What is wrong with the displayed termination?

The untwisted length of each wire is too long.

Which characteristic describes crosstalk?

the distortion of the transmitted messages from signals carried in adjacent wires

What technique is used with UTP cable to help protect against signal interference from crosstalk?

twisting the wires together into pairs