Network+ Chapter 5

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Simplex, simplex, half-duplex
When an Ethernet NIC has been configured by the OS to use half-duplex, the transmit pair of the twisted-pair cable uses _____ transmissions, the receive pair in the cable uses ____ transmissions, and the twisted-pair cable uses ______ transmissions.
Ethernet
Which of the following is not an example of a broadband transmission?
Statistical multiplexing
Which kind of multiplexing assigns slots to nodes according to priority and need?
Analog
Which type of transmission is measured by baud rate?
Coaxial cable, coaxial cable, F-connector
What kind of cable uses BNC connectors? F-connectors? Which connector is likely to be used by cable TV?
Cat 5e and higher
Which categories of twisted-pair cable can support Gigabit Ethernet?
Cat 6
What is the earliest twisted-pair cabling standard that meets the minimum requirements for 10GBase-T transmissions?
NEXT
Which type of cross-talk occurs between wire pairs near the source of a signal?
Amplifier, repeater
What device can boost an analog signal? A digital signal?
Probe
Which part of a toner and probe kit emits a tone when it detects electrical activity on a wire pair?
​sheath
​What term below is used to describe the outer-most layer of protective covering of a coaxial cable?
10Base2
What Ethernet standard below is also referred to as “thinnet”?​
​Cat 5e
What is the minimum category of UTP cable required in order to support Gigabit speeds?​
​10 Gbps
What is the maximum supported throughput of a CAT6 cable?​
4
How many cable pairs are needed for 1000Base-T transmission over CAT5e cable?​
​15.4 watts
Standard PoE devices ​must be provided with how much power in order to function?
40km
What is the maximum distance for 10GBase-ER and 10GBase-EW on a segment of single mode fiber?​
near end cross talk
What type of cross-talk occurs between wire pairs near the source of a signal? ​
​MT-RJ
Which of the following connectors is the most common for multimode fiber?​
​amplitude
​A measure of a signal’s strength at any given time is known as which term below?
​frequency
The number of times that a wave’s amplitude cycles from its starting point, through its highest amplitude and its lowest amplitude, and back to its starting point over a fixed period of time, is known as ​what term below?
​amplitude
​40
​WDM divides a beam of light into how many different wavelengths or colors?
CWDM
Which type of multiplexing is defined by wavelength instead of frequency?​
75 ohms
​Which option below reflects the standard impedance of an RG-6 cable?
FDM
Phone companies make use of what type of multiplexing in order to allow for phone services and DSL services over the same line?​
​DWDM
The most common multiplexing technology used in conjunction with fiber optics is which option below?​
​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?​
baseband
Ethernet is an example of what type of technology?​
​broadband
Since cable TV and cable ​Internet can share the same coaxial cable, they are considered to be what type of technology?
​multiplexing
Using a form of transmission that allows multiple signals to travel simultaneously over one medium is known as which of the following options?​

Using DWDM, a single fiber can carry between what two numbers of channels?​

a.
​60

b.
​80

c.
​160

d.
​200

b.
​80
c.
​160

What two items below are commonly expressed as bits transmitted per second?

a.
frequency

b.
​amplitude

c.
​throughput

d.
​bandwidth

c.
​throughput
d.
​bandwidth

8. ​What two connector types are typically used to terminate RG-6 and RG-59 cables?

a.

​f-connectors

b.

​BNC

c.

​ST couplers

d.

J-hooks

a.

​f-connectors

b.

​BNC

Frequencies used to convey speech over telephone lines fall between what two frequencies below?​

a.
​100 Hz

b.
​300 Hz

c.
​3.3 KHz

d.
​5.5 KHz

b.
​300 Hzc.
​3.3 KHz

What is the maximum supported throughput and bandwidth / signal rate of Cat 5e?​

a.
​100 Mbps

b.
​1000 Gbps

c.
​100 MHz

d.
​350 MHz

b.
​1000 Gbpsd.
​350 MHz

What term below is used to describe the outer-most layer of protective covering of a coaxial cable?

a.
​sheath

b.
​shield

c.
​braiding

d.
​insulation

a.
​sheath

What Ethernet standard below is also referred to as “thinnet”?​

a.
​100Base2

b.
​10Base2

c.
​100BaseT

d.
​10BaseT

b.
​10Base2

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

c.
​Cat 5e

. What is the maximum supported throughput of a CAT6 cable?​

a.
​100 Mbps

b.
​1 Gbps

c.
​10 Gbps

d.
​100 Gbps

c.
​10 Gbps

20. How many cable pairs are needed for 1000Base-T transmission over CAT5e cable?​

a.

​2

b.

​4

c.

​6

d.

​8

b.

​4

Standard PoE devices ​must be provided with how much power in order to function?

a.
​5 watts

b.
​12 watts

c.
​15.4 watts

d.
​25.5 watts

c.
​15.4 watts

What is the maximum distance for 10GBase-ER and 10GBase-EW on a segment of single mode fiber?​

a.
​550m

b.
​300m

c.
10km

d.
​40km

d.
​40km

What type of cross-talk occurs between wire pairs near the source of a signal? ​

a.
​far end cross talk

b.
​near end cross talk

c.
​alien cross talk

d.
pair migration cross talk

b.
​near end cross talk

Which of the following connectors is the most common for multimode fiber?​

a.
​ST

b.
​SC

c.
​FC

d.
​MT-RJ

d.
​MT-RJ

A measure of a signal’s strength at any given time is known as which term below?

a.
​amplitude

b.
​frequency

c.
​phase

d.
​wavelength

a.
​amplitude

The number of times that a wave’s amplitude cycles from its starting point, through its highest amplitude and its lowest amplitude, and back to its starting point over a fixed period of time, is known as ​what term below?

a.
​amplitude

b.
​frequency

c.
​wavelength

d.
​phase

b.
​frequency

WDM divides a beam of light into how many different wavelengths or colors?

a.
​10

b.
​20

c.
​30

d.
​40

d.
​40

. Which type of multiplexing is defined by wavelength instead of frequency?​

a.
​CWDM

b.
​DWDM

c.
​WDM

d.
​FDM

a.
​CWDM

. ​Which option below reflects the standard impedance of an RG-6 cable?

a.
​50 ohms

b.
​60 ohms

c.
​65 ohms

d.
​75 ohms

d.
​75 ohms

Phone companies make use of what type of multiplexing in order to allow for phone services and DSL services over the same line?​

a.
​WDM

b.
​FDM

c.
​DWDM

d.
​CWDM

b.
​FDM

The most common multiplexing technology used in conjunction with fiber optics is which option below?​

a.
​DWDM

b.
​CWDM

c.
​FDM

d.
​WDM

a.
​DWDM

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?​

a.
​A modem

b.
​A transceiver

c.
​A demuxer

d.
​A multiplexer

a.
​A modem

Ethernet is an example of what type of technology?​

a.
​broadband

b.
​baseband

c.
​wideband

d.
​narrowband

b.
​baseband

34. Since cable TV and cable ​Internet can share the same coaxial cable, they are considered to be what type of technology?

a.

​broadband

b.

​baseband

c.

​narrowband

d.

​wideband

a.

​broadband

35. Using a form of transmission that allows multiple signals to travel simultaneously over one medium is known as which of the following options?​

a.

embedding

b.

​multiplexing

c.

​coupling

d.

​modulating

b.

​multiplexing

A Physical layer standard for networks that
achieves 1 Gbps over Cat 6 or better cabling using only two
pairs of wires.
b.
1000Base-TX​
42. A character encoding system consisting of 128 characters.​
ANSWER:
​ASCII
A term used to refer to a type of twisted-pair cable. All of the category cables fall under the TIA/EIA 568 standard.
CAT
A form of transmission that allows multiple signals to travel simultaneously over one medium.​
multiplexing
45. An unwanted connection, such as when exposed wires touch each other.​
short circuit​
Physical layer standard for networks that specifies 1-Gbps transmission over fiber-optic cable using baseband transmission, relying on 1300 nanometer wavelengths.​
1000Base-LX
47. The distance between corresponding points on a wave’s cycle, expressed in meters or feet.
wavelength
Cross-talk measured at the far end of the cable from the signal source. ​
far end cross-talk (FEXT)​
The amount of data that a medium transmits during a given period of time.
throughput
A multiplexing technique used over single-mode or multimode fiber-optic cable in which each signal is assigned a different wavelength for its carrier wave.​
DWDM (Dense Wavelength Division Multiplexing)

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