Deck 5: Network Cabling

Question 1

 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?

A) Router console ports are only used when connected to other routers.
B) The router console port is providing an Ethernet connection, instead of a serial connection.
C) The USB standard is incompatible with the serial connection used by the console port.
D) The cable must be a rollover cable.

Answer 1

D

Question 2

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

Answer 2

False

Question 3

 A time domain reflectometer sends a signal and analyzes the return signal's change in amplitude to determine where cable imperfections may exist.

Answer 3

True

Question 4

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

A) Cat 3
B) Cat 5
C) Cat 5e
D) Cat 6

Question 5

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

Question 6

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

Question 7

 What is the maximum supported throughput of a CAT6 cable?

A) 100 Mbps
B) 1 Gbps
C) 10 Gbps
D) 100 Gbps

Question 8

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

Question 9

 PoE+ devices are defined by what IEEE standard?

A) 802.3at
B) 802.3af
C) 802.3fc
D) 802.3c

Question 10

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

A) NEXT is crosstalk that occurs between wire pairs near the source of a signal.
B) NEXT is crosstalk that occurs near the opposite end of a signal source.
C) NEXT is crosstalk that occurs when an EMI source is near the data signal source.
D) NEXT is crosstalk that occurs only when a cable segment exceeds the bend radius.

Question 11

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

A) statistical time division multiplexing
B) dense wavelength division multiplexing
C) coarse wavelength division multiplexing
D) spaced wavelength division multiplexing

Question 12

 Latency on data networks is based on a calculation of a packet's round trip time (RTT).

Question 13

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

Question 14

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

A) joules
B) volts
C) decibels
D) farads

Question 15

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

Question 16

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

A) time division multiplexing
B) statistical time division multiplexing
C) frequency division multiplexing
D) wavelength division multiplexing

Question 17

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

Question 18

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

A) A customer modem is continuously losing signal due to large distance from the transmitting device.
B) A network switch interface is dropping due to a powerful radio transmitter in the adjacent room.
C) A customer's video conferencing application is experiencing delay in audio and video that comes and goes.
D) Two network interfaces are experiencing problems at the same time due to the cables having adjacent runs.

Question 19

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

A) 550m
B) 300m
C) 10km
D) 40km

Question 20

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

Question 21

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

A) full-duplex
B) duplex
C) half-duplex
D) simplex

Question 22

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

A) The number of twists in the copper core.
B) The overall thickness of the cable.
C) The maximum distance the cable is rated for, in kilometers.
D) The materials used for shielding and conducting cores.

Question 23

 What statement correctly describes "jitter"?

A) Jitter is what happens when packets experience varying amounts of delay and arrive out of order.
B) Jitter is the loss of 50% or more packets in a given data stream, causing a connection to falter.
C) Jitter is the fluctuation of a signal's strength as it travels away from its source.
D) Jitter is the transmission of signal onto unintended pairs in a copper cable.

Question 24

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

A) continuity tester
B) multimeter
C) time domain reflectometer
D) light meter

Question 25

 What statement regarding the Power Over Ethernet standards is inaccurate?

A) The amount of power provided is 15.4 watts for standard PoE devices.
B) Power over Ethernet requires CAT6 or better copper cable.
C) Electric current may run over a pair of wires used for data transmission.
D) A device that supplies power for PoE is known as power sourcing equipment.

Question 26

 Telephone connections follow what registered jack standard?

A) registered jack 11 (RJ-11)
B) registered jack 12 (RJ-12)
C) registered jack 45 (RJ-45)
D) registered jack 100 (RJ-100)

Question 27

 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?

A) subscriber connector (SC)
B) straight tip (ST)
C) Mechanical Transfer-Registered Jack (MTRJ)
D) local connector (LC)

Question 28

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

A) TIA/EIA 568A
B) TIA/EIA 568B
C) TIA/EIA 568F
D) TIA/EIA rollover

Question 29

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

A) A mismatched connector will have different impedance ratings, causing data errors.
B) A mismatched connector will not fit the coaxial cable for termination.
C) A mismatched connector will work fine, but breaks cabling standards.
D) A mismatched connector will destroy the equipment it is connected to.

Question 30

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

A) RG-59
B) RG-6
C) RG-20
D) LRG-50

Question 31

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

A) fiber stripper
B) fiber snipper
C) fiber cleaver
D) fiber saw

Question 32

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

A) Fiber-optic cabling has a low resistance to signal noise.
B) Light experiences virtually no resistance when traveling through glass.
C) Fiber-optic cable is cheaper than shielded twisted pair cabling.
D) The maximum length for a fiber segment is 20km.

Question 33

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

A) 8 degrees
B) 12 degrees
C) 14 degrees
D) 16 degrees

Question 34

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

A) wavelength division multiplexing
B) time division multiplexing
C) frequency division multiplexing
D) statistical time division multiplexing

Question 35

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

A) white/green, green, white/orange, blue, white/blue, orange, white/brown, brown
B) blue, white/blue, green, white/green, orange, white/orange, brown, white/brown
C) white/orange, orange, white/green, blue, white/blue, green, white/brown, brown
D) white/brown, brown, white/green, blue, white/blue, green, orange, white/orange

Question 36

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

A) 1/2 inch
B) 3/8 inch
C) 4/5 inch
D) 1/5 inch

Question 37

 The 1000Base-LX utilizes light with what wavelength?

A) 850 nanometers
B) 1200 nanometers
C) 1300 nanometers
D) 1550 nanometers

Question 38

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

A) 1, 2, 4, 5
B) 1, 2, 3, 5
C) 1, 2, 3, 6
D) 1, 2, 7, 8

Question 39

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

A) SFP+ provides the same function as GBICs and is more compact. It is theoretically capable of 5 Gbps.
B) SFP+ supports up to 10 Gbps and is slightly larger than SFP, with lower power consumption than XFP.
C) SFP+ is the same size as SFP, and supports a theoretical maximum transmission speed of 16 Gbps.
D) SFP+ complies with the 802.3ba standard, allowing four channels in a single transceiver and supporting up to 40 Gbps data rates.

Question 40

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

A) 100Base-T
B) 1000Base-T
C) 10GBase-T
D) 10TBase-T

Question 41

 What is the difference between single mode fiber and multimode fiber, and how do they compare?

Question 42

 What is a fiber distribution panel, and how is it used?

Question 43

 What are the different transceiver types that have made the GBIC obsolete?

Question 44

 When tracing a wire, how do you utilize a toner and probe kit?

Question 45

 Describe the two different shapes and polishes currently used on SMF ferrules to reduce back reflection.

Question 46

 Noise can degrade or distort a signal on a network; what are some of its causes?

Question 47

 How does a time domain reflectometer (TDR) work?

Question 48

 What is the difference between bandwidth and throughput?

Question 49

 How does modal bandwidth affect the performance of a multimode fiber segment?

Question 50

 What is the biggest limiting factor on fiber-optic cable length?