Chapter 5 Flashcards
A serial cable with an RJ-45 connector is capable of being used through an RJ-45 Ethernet port. T or F.
False
Multimode fiber contains a core that is larger than a single mode fiber core. T or F
True
A continuity tester should not be used on a live network segment. T or F
True
In order to achieve 1000Base-T over CAT5e cable, 2 pairs of copper are needed. T or F
False
The ST and SC fiber connectors are the most commonly found connectors due to their smaller sizes. T or F
False
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
True
Latency on data networks is based on a calculation of a packet’s round trip time (RTT). T or F
True
RG-59 is more expensive than RG-6, but has better resistance to attenuation. T or F
False
A short circuit is one where needed connections are missing, such as when a wire breaks. T or F
False
A wavelength mismatch occurs when transmissions are optimized for one type of cable but sent over a different type of cable. T or F
True
What is the minimum category of UTP cable required in order to support Gigabit speeds?
Cat 3
Cat 5
Cat 6
Cat 5e
Cat 5e
What is the maximum supported throughput of a CAT6 cable?
100 Gbps
10 Gbps
1 Gbps
100 Mbps
10 Gbps
PoE+ devices are defined by what IEEE standard?
- 3c
- 3fc
- 3at
- 3af
802.3at
Both 10GBase-ER and 10GBase-EW have what maximum distance limitation on a segment of single mode fiber?
40km
550m
10km
300m
40 KM
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.
NEXT is crosstalk that occurs between wire pairs near the source of a signal.
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
Coarse wavelength division multiplexing
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.
The cable must be a rollover cable.
Noise that can degrade or distort a signal on a network is measured with what unit?
decibels
farads
joules
volts
Decibels
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 customer modem is continuously losing signal due to large distance from the transmitting device.
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
Statistical time division multiplexing
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.
The materials used for shielding and conducting cores.
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
TIA/EIA 568A
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
1, 2, 3, 6
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
3/8 Inch
What is the fastest Ethernet standard that can possibly be used on twisted-pair cabling?
10TBase-T
100Base-T
10GBase-T
1000Base-T
10GBase-T
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.
Light experiences virtually no resistance when traveling through glass.
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
Fiber cleaver
What is the industry standard angle for an Angle Polished Connector (APC)?
8 degrees
16 degrees
14 degrees
12 degrees
8 degrees
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)
Local connector (LC)
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.
SFP+ is the same size as SFP, and supports a theoretical maximum transmission speed of 16 Gbps.
The 1000Base-LX utilizes light with what wavelength?
850 nanometers
1550 nanometers
1200 nanometers
1300 nanometers
1300 nanometers
What kind of tool can you use to measure voltage on a cable length?
light meter
multimeter
time domain reflectometer
continuity tester
Multimeter
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 mismatched connector will have different impedance ratings, causing data errors.
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
White/orange, orange, white/green, blue, white/blue, green, white/brown, brown
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)
Registered jack 11 (RJ-11)
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
Power over Ethernet requires CAT6 or better copper cable
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
Wavelength division multiplexing
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
Simplex
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.
Jitter is what happens when packets experience varying amounts of delay and arrive out of order.
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
RG-6
