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Digital signals are composed of pulses of precise, positive voltages and zero voltages. |
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. |
False |
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What two items below are commonly expressed as bits transmitted per second? |
throughput, bandwidth |
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What two connector types are typically used to terminate RG-6 and RG-59 cables? |
f-connectors, BNC |
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What is the maximum supported throughput and bandwidth / signal rate of Cat 5e? |
1000 Mbps |
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What Ethernet standard below is also referred to as "thinnet"? |
10Base2 |
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How many cable pairs are needed for 1000Base-T transmission over CAT5e cable? |
4 |
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Standard PoE devices must be provided with how much power in order to function? |
15.4 watts |
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What type of cross-talk occurs between wire pairs near the source of a signal? |
near end cross talk |
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Which of the following connectors is the most common for multimode fiber? |
MT-RJ |
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A measure of a signal’s strength at any given time is known as which term below? |
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? |
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? |
FDM |
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The most common multiplexing technology used in conjunction with fiber optics is which option below? |
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? |
broadband |
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The amount of data that a medium transmits during a given period of time. |
throughput |
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An unwanted connection, such as when exposed wires touch each other. |
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. |
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. |
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. |
1000Base-LX |
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A character encoding system consisting of 128 characters. |
ASCII |
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A form of transmission that allows multiple signals to travel simultaneously over one medium. |
multiplexing |
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The distance between corresponding points on a wave’s cycle, expressed in meters or feet. |
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. |
Cat (category) |
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Cross-talk measured at the far end of the cable from the signal source. |
far end cross-talk (FEXT) |
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