Network + Chapter 5

25 July 2022
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25 test answers

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question
Digital signals are composed of pulses of precise, positive voltages and zero voltages.​
answer
True
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Because digital signals do not depend on amplitude or frequency differences to communicate information, they are more vulnerable to EMI noise.​
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False
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What two items below are commonly expressed as bits transmitted per second?
answer
​throughput, ​bandwidth
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​What two connector types are typically used to terminate RG-6 and RG-59 cables?
answer
​f-connectors, ​BNC
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What is the maximum supported throughput and bandwidth / signal rate of Cat 5e?
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1000 Mbps
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What Ethernet standard below is also referred to as "thinnet"?​
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​10Base2
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How many cable pairs are needed for 1000Base-T transmission over CAT5e cable?​
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​4
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Standard PoE devices ​must be provided with how much power in order to function?
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​15.4 watts
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What type of cross-talk occurs between wire pairs near the source of a signal? ​
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​near end cross talk
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Which of the following connectors is the most common for multimode fiber?​
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​MT-RJ
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​A measure of a signal's strength at any given time is known as which term below?
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​amplitude
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The number of times that a wave's amplitude cycles from its starting point, through its highest amplitude and its lowest amplitude, and back to its starting point over a fixed period of time, is known as ​what term below?
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​frequency
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Phone companies make use of what type of multiplexing in order to allow for phone services and DSL services over the same line?​
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​FDM
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The most common multiplexing technology used in conjunction with fiber optics is which option below?​
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​DWDM
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Since cable TV and cable ​Internet can share the same coaxial cable, they are considered to be what type of technology?
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​broadband
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The amount of data that a medium transmits during a given period of time.
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​throughput
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An unwanted connection, such as when exposed wires touch each other.​
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short circuit​
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A multiplexing technique used over single-mode or multimode fiber-optic cable in which each signal is assigned a different wavelength for its carrier wave.​
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​DWDM (Dense Wavelength Division Multiplexing)
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A Physical layer standard for networks that achieves 1 Gbps over Cat 6 or better cabling using only two pairs of wires.
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1000Base-TX​
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Physical layer standard for networks that specifies 1-Gbps transmission over fiber-optic cable using baseband transmission, relying on 1300 nanometer wavelengths.​
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​1000Base-LX
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A character encoding system consisting of 128 characters.​
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​ASCII
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A form of transmission that allows multiple signals to travel simultaneously over one medium.​
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​multiplexing
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The distance between corresponding points on a wave's cycle, expressed in meters or feet.
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wavelength
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A term used to refer to a type of twisted-pair cable. All of the category cables fall under the TIA/EIA 568 standard.Cross-talk measured at the far end of the cable from the signal source. ​
answer
Cat (category)​
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Cross-talk measured at the far end of the cable from the signal source. ​
answer
far end cross-talk (FEXT)​