Networking HW CH 5
A modem
A device that is responsible for modulating digital signals into analog signals, and demodulating analog signals into digital signals at the receiving end, is known as?
True
Digital signals are composed of pulses of precise, positive voltages and zero voltages.
baseband
Ethernet is an example of what type of technology?
DWDM (dense wave division multiplexing)
The most common multiplexing technology used in conjunction with fiber optics is which option below?
throughput, bandwidth
What two items below are commonly expressed as bits transmitted per second?
latency
____________ causes problems only when a receiving node is expecting some type of communication, such as the rest of the data stream it has begun to accept.
MTRJ (Mechanical Transfer Registered Jack)
Which fiber connector contains two strands of fiber in each ferrule?
NEXT (Near-End CrossTalk)
Which kind of crosstalk occurs between wire pairs near the source of the signal?
Bandwidth
Which transmission characteristic is never fully achieved?
MT-RJ (Mechanical Transfer Registered Jack)
Which of the following connectors is the most common for multimode fiber?
Cat 5e, Cat 6a, Cat 7
Which of these categories of twisted- pair cable can support Gigabit Ethernet?
Tone locator
Which part of a toner and probe kit emits an audible tone when it detects electrical activity on a wire pair?
STDM (statistical time division multiplexing)
Which kind of multiplexing assigns slots to nodes according to priority and need?
near end cross talk
What type of cross-talk occurs between wire pairs near the source of a signal?
Fiber type mismatch
What type of fiber cable problem is caused when pairing a 50-micron core cable with a 62.5-micron core cable?
False
A serial cable with an RJ-45 connector is capable of being used through an RJ-45 Ethernet port.
True
Multimode fiber contains a core that is larger than a single mode fiber core.
FDM (frequency division multiplexing)
Phone companies make use of what type of multiplexing in order to allow for phone services and DSL services over the same line?
broadband
Since cable TV and cable Internet can share the same coaxial cable, they are considered to be what type of technology?
f-connectors, BNC
What two connector types are typically used to terminate RG-6 and RG-59 cables?
rollover
A _____________ cable reverses all of the wires without regard to how they are paired.
repeater
A _____________ is a device that retransmits a digital signal in its original form, extending the length of a segment.
multimeter
A _____________ is a simple instrument that can measure many characteristics of an electric circuit, including its resistance, voltage, and impedance.
symbol
A ______________ is a voltage, frequency, pulse, or phase change in an analog transmission.
4
How many cable pairs are needed for 1000Base-T transmission over CAT5e cable?
MIMO (multiple input-multiple output)
In the context of 802.11n/ac wireless networking, the ability for access points to use multiple antennas in order to issue multiple signals to stations, thereby multiplying the signal's strength and increasing their range and data-carrying capacity.
15.4 watts
Standard PoE devices must be provided with how much power in order to function?
White/Green
Suppose you're creating patch cables to be used in a government office. What color wire goes in the first pin?
80, 160
Using DWDM, a single fiber can carry between what two numbers of channels?
multiplexing
Using a form of transmission that allows multiple signals to travel simultaneously over one medium is known as which of the following options?
10Base2
What Ethernet standard below is also referred to as "thinnet"?
Cat 6a
What is the earliest twisted-pair cabling standard that meets the minimum requirements for 10GBase-T transmissions?
40km
What is the maximum distance for 10GBase-ER and 10GBase-EW on a segment of single mode fiber?
1000 Gbps, 350 MHz
What is the maximum supported throughput and bandwidth / signal rate of Cat 5e?
Coaxial cable, F-connector
What kind of cable uses BNC connectors? Which connector is likely to be used by cable TV?
75 ohms
Which option below reflects the standard impedance of an RG-6 cable?