Networking HW CH 5

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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?


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