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Networking > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

A serial cable with an RJ-45 connector is capable of being used through an RJ-45 Ethernet port. T or F.

A

False

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2
Q

Multimode fiber contains a core that is larger than a single mode fiber core. T or F

A

True

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3
Q

A continuity tester should not be used on a live network segment. T or F

A

True

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4
Q

In order to achieve 1000Base-T over CAT5e cable, 2 pairs of copper are needed. T or F

A

False

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5
Q

The ST and SC fiber connectors are the most commonly found connectors due to their smaller sizes. T or F

A

False

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6
Q

A time domain reflectometer sends a signal and analyzes the return signal’s change in amplitude to determine where cable imperfections may exist. T or F

A

True

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7
Q

Latency on data networks is based on a calculation of a packet’s round trip time (RTT). T or F

A

True

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8
Q

RG-59 is more expensive than RG-6, but has better resistance to attenuation. T or F

A

False

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9
Q

A short circuit is one where needed connections are missing, such as when a wire breaks. T or F

A

False

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10
Q

A wavelength mismatch occurs when transmissions are optimized for one type of cable but sent over a different type of cable. T or F

A

True

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11
Q

What is the minimum category of UTP cable required in order to support Gigabit speeds?

Cat 3

Cat 5

Cat 6

Cat 5e

A

Cat 5e

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12
Q

What is the maximum supported throughput of a CAT6 cable?

100 Gbps

10 Gbps

1 Gbps

100 Mbps

A

10 Gbps

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13
Q

PoE+ devices are defined by what IEEE standard?

802.3c

802.3fc

802.3at

802.3af

A

802.3at

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14
Q

Both 10GBase-ER and 10GBase-EW have what maximum distance limitation on a segment of single mode fiber?

40km

550m

10km

300m

A

40 KM

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15
Q

Which statement accurately describes what near end crosstalk (NEXT) is?

NEXT is crosstalk that occurs between wire pairs near the source of a signal.

NEXT is crosstalk that occurs when an EMI source is near the data signal source.

NEXT is crosstalk that occurs near the opposite end of a signal source.

NEXT is crosstalk that occurs only when a cable segment exceeds the bend radius.

A

NEXT is crosstalk that occurs between wire pairs near the source of a signal.

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16
Q

What multiplexing technology lowers cost by spacing frequency bands wider apart to allow for cheaper transceiver equipment?

statistical time division multiplexing

dense wavelength division multiplexing

spaced wavelength division multiplexing

coarse wavelength division multiplexing

A

Coarse wavelength division multiplexing

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17
Q

A junior administrator is having issues connecting to a router’s console port using a TIA/EIA 568B standard cable and a USB serial to RJ-45 adapter, despite verifying terminal settings. What is the issue?

The cable must be a rollover cable.

Router console ports are only used when connected to other routers.

The router console port is providing an Ethernet connection, instead of a serial connection.

The USB standard is incompatible with the serial connection used by the console port.

A

The cable must be a rollover cable.

18
Q

Noise that can degrade or distort a signal on a network is measured with what unit?

decibels

farads

joules

volts

A

Decibels

19
Q

What statement describes a transmission flaw that is occurring due to attenuation?

A customer modem is continuously losing signal due to large distance from the transmitting device.

A network switch interface is dropping due to a powerful radio transmitter in the adjacent room.

Two network interfaces are experiencing problems at the same time due to the cables having adjacent runs.

A customer’s video conferencing application is experiencing delay in audio and video that comes and goes.

A

A customer modem is continuously losing signal due to large distance from the transmitting device.

20
Q

Utilizing time slots that are adjusted according to priority and need is an example of what type of multiplexing on copper lines?

wavelength division multiplexing

time division multiplexing

frequency division multiplexing

statistical time division multiplexing

A

Statistical time division multiplexing

21
Q

In a coaxial cabling, what does the RG rating measure?

The materials used for shielding and conducting cores.

The maximum distance the cable is rated for, in kilometers.

The overall thickness of the cable.

The number of twists in the copper core.

A

The materials used for shielding and conducting cores.

22
Q

You have been awarded a contract for wiring a new federal building. What twisted-pair wiring standard must you use?

TIA/EIA 568B

TIA/EIA 568A

TIA/EIA 568F

TIA/EIA rollover

A

TIA/EIA 568A

23
Q

A Fast Ethernet connection utilizes what pins on an RJ-45 plug?

1, 2, 3, 6

1, 2, 4, 5

1, 2, 3, 5

1, 2, 7, 8

A

1, 2, 3, 6

24
Q

When terminating an Ethernet cable, about how far should the cable sheath extend into the plug?

4/5 inch

1/5 inch

3/8 inch

1/2 inch

A

3/8 Inch

25
Q

What is the fastest Ethernet standard that can possibly be used on twisted-pair cabling?

10TBase-T

100Base-T

10GBase-T

1000Base-T

A

10GBase-T

26
Q

Which of the following statements about fiber-optic cabling is accurate?

Fiber-optic cable is cheaper than shielded twisted pair cabling.

The maximum length for a fiber segment is 20km.

Fiber-optic cabling has a low resistance to signal noise.

Light experiences virtually no resistance when traveling through glass.

A

Light experiences virtually no resistance when traveling through glass.

27
Q

A typical fiber termination kit should include what tool for cutting a clean slice through fiber strands?

fiber cleaver

fiber stripper

fiber snipper

fiber saw

A

Fiber cleaver

28
Q

What is the industry standard angle for an Angle Polished Connector (APC)?

8 degrees

16 degrees

14 degrees

12 degrees

A

8 degrees

29
Q

You’ve been handed a fiber with a 1.25-mm ferrule that requires a connector. What is the most commonly used connector for this ferrule size?

local connector (LC)

Mechanical Transfer-Registered Jack (MTRJ)

subscriber connector (SC)

straight tip (ST)

A

Local connector (LC)

30
Q

Which of the following statements correctly describes the SFP+ transceiver?

SFP+ complies with the 802.3ba standard, allowing four channels in a single transceiver and supporting up to 40 Gbps data rates.

SFP+ supports up to 10 Gbps and is slightly larger than SFP, with lower power consumption than XFP.

SFP+ provides the same function as GBICs and is more compact. It is theoretically capable of 5 Gbps.

SFP+ is the same size as SFP, and supports a theoretical maximum transmission speed of 16 Gbps.

A

SFP+ is the same size as SFP, and supports a theoretical maximum transmission speed of 16 Gbps.

31
Q

The 1000Base-LX utilizes light with what wavelength?

850 nanometers

1550 nanometers

1200 nanometers

1300 nanometers

A

1300 nanometers

32
Q

What kind of tool can you use to measure voltage on a cable length?

light meter

multimeter

time domain reflectometer

continuity tester

A

Multimeter

33
Q

Why should you terminate coaxial cable with connectors that are rated for the exact cable type?

A mismatched connector will have different impedance ratings, causing data errors.

A mismatched connector will destroy the equipment it is connected to.

A mismatched connector will not fit the coaxial cable for termination.

A mismatched connector will work fine, but breaks cabling standards.

A

A mismatched connector will have different impedance ratings, causing data errors.

34
Q

When viewing the pinout for T568B, what is the correct order of wire colors, starting at pin 1?

blue, white/blue, green, white/green, orange, white/orange, brown, white/brown

white/green, green, white/orange, blue, white/blue, orange, white/brown, brown

white/brown, brown, white/green, blue, white/blue, green, orange, white/orange

white/orange, orange, white/green, blue, white/blue, green, white/brown, brown

A

White/orange, orange, white/green, blue, white/blue, green, white/brown, brown

35
Q

Telephone connections follow what registered jack standard?

registered jack 11 (RJ-11)

registered jack 12 (RJ-12)

registered jack 100 (RJ-100)

registered jack 45 (RJ-45)

A

Registered jack 11 (RJ-11)

36
Q

What statement regarding the Power Over Ethernet standards is inaccurate?

Electric current may run over a pair of wires used for data transmission.

The amount of power provided is 15.4 watts for standard PoE devices.

A device that supplies power for PoE is known as power sourcing equipment.

Power over Ethernet requires CAT6 or better copper cable

A

Power over Ethernet requires CAT6 or better copper cable

37
Q

Bidirectional transceivers utilize what technology to separate the data in each direction?

statistical time division multiplexing

wavelength division multiplexing

time division multiplexing

frequency division multiplexing

A

Wavelength division multiplexing

38
Q

Signals that can travel in only one direction on a medium are referred to as what type of signal?

simplex

duplex

half-duplex

full-duplex

A

Simplex

39
Q

What statement correctly describes “jitter”?

Jitter is what happens when packets experience varying amounts of delay and arrive out of order.

Jitter is the fluctuation of a signal’s strength as it travels away from its source.

Jitter is the loss of 50% or more packets in a given data stream, causing a connection to falter.

Jitter is the transmission of signal onto unintended pairs in a copper cable.

A

Jitter is what happens when packets experience varying amounts of delay and arrive out of order.

40
Q

Broadband cable Internet service and cable TV are most commonly delivered over long distances via what type of cable?

RG-59

RG-20

RG-6

LRG-50

A

RG-6

Networking (12 decks)

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