Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

2018 MM > CT3 (IS 2018) > Flashcards

CT3 (IS 2018) Flashcards

1
Q

What does eMTA stand for?

A

embedded mutimedia terminal adapter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what does CMTS stand for?

A

Cable Modem Termination System

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

There are three major music licensing organizations which provide the rights for businesses to play licensed recordings:

A

ASCAP, BMI, SESAC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

A complex number with a resistive and reactive component. It is a function of the frequency of the applied signal, and is unrelated to length

A

Characteristic Impedance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Business Internet Customer Support a technician can be dispatched within ______, including on weekends and holidays

A

4 hours

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Business TV is not available to venues that:

A

Charge an admission or entry fee. (However, a monthly or yearly membership is not considered as admission fee. Thus, Business TV is made available to health clubs or special interest clubs.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

(Attenuation x Footage)

A

Cable Loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a Byte (B)?

A

8 bits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Short for “picture element.”

A

Pixel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What DOCSIS standard brought about channel bonding and IPv6?

A

DOCSIS 3.0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Roughly one thousand megabytes.

A

Gigabyte (GB)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Roughly 1000 bits.

A

Kilobit (Kb)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is a bit?

A

a single character of data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What numbers do you need to dial in order to place an international call?

A

011 + country code

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Television pictures are displayed in a single pass, instead of the two fields used with interlaced scanning

A

progressive scanning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Insulate wiring disconnected at the NID with __________or similar if it is going to have continuity back to the eMTA.

A

Scotchloks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Roughly one million bits

A

Megabit (Mb)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The variable in calculating attenuation is always

A

The frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Preferred method of coax cable routing

A

Home Run

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Central Office (CO) server that routes calls to other IP-based phones or through the PSTN

A

Soft switch (Software Switch, VoIP Switch, or CMS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What website would you direct a customer to for anything business class related?

A

http://business.comcast.com/

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

FCC part 76.614

A

States that any leakage source which produces a field strength of 20 uV/m or greater at a distance of 3 meters in the aeronautical radio frequency bands shall be noted and such leakage sources shall be repaired within a reasonable period of time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Ring voltage for CDV?

A

60-90 VAC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the difference between dB and dBmV?

A

dB is relative, dBmV is absolute

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

The opposition a material offers to the flow of electrical current

A

Resistance (R)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

The width of a band of frequencies

A

Bandwidth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Refers to the telephone only portion of the eMTA. It is typically used for provisioning XFINITY Voice when using the IVR

A

MTA-MAC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Single pair silver satin utilizes pins ______ of the connector

A

2 and 3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Large 24-pin connector in which audio is not provided

A

DVI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Series-6 cable bending radius:

A

2.5”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Often called Cable Modem MAC, is typically used when provisioning an installation for both XFINITY Voice and Internet

A

CMAC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

The modem waits for an opportunity to communicate with the CMTS. If it does not get an opportunity within about 12 seconds, a __ timeout occurs.

A

T2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Managed Internet access, available to corporations that have a distributed, mobile workforce of at least 100 persons

A

Teleworker Internet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

The most important part of a Home Theater system is the?

A

video display

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

German physicist, investigated galvanic currents and established the mathematical relationship between voltage, current, and resistance

A

Georg Simon Ohm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

CPE that may have REN specifications:

A

Answering machine, Fax machine, Phone modem, Monitoring devices, Alarm systems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

DHCP

A

Dynamic Host Configuration Protocol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Indicates the pair polarity, detects a short circuit, and indicates the presence of “talk battery” (connection to the network)

A

Toner

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

The ____ format utilizes two sequential fields of 540 lines each

A

1080i

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Interlacing produces __ fields or __ complete frames every second

A

6030

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

What tools can you use to check polarity on a phone line?

A

Butt Set and Toner

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

At 400 MHz, 100 feet of RG6 cable loses roughly

A

4 dB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

What is the supervisory voltage provided by an eMTA?

A

42-48 VDC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

MoCA 1.1 offers ___ ____ MAC rates and __ node network extensions

A

175 Mbps16

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

DOCSIS 1.1 added full standardization and quality of service capabilities

A

April 1999

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

What is DHCP?

A

Dynamic Host Configuration Protocol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

what are the names of of the two levels of teleworker?

A

Standard and enhanced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

In homes with loop-through wiring, the primary line may have been moved to the ____________ pair because of damage to the _________ pair somewhere in the wall

A

black/yellow red/green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

The flow of electrons through a conductor

A

Current (I)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

(Cable Loss + Passive Loss)

A

Total Loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

List 2 safety precautions to take before working on phone lines.

A

Disconnect ILEC, Disconnect eMTA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

A return path impairment that can have a severe effect on return path signal quality

A

CPD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

Uses LED backlighting instead of the cold cathode fluorescents CCFL

A

LED-backlit LCD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

Each 10 degree increase in temperature results in a

A

1.2% increase in attenuation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

An _____ jack isolates the alarm panel from the eMTA in the telephone circuit.

A

RJ31X

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

At 750 MHz, 100 feet of RG6 cable loses roughly

A

5.5 dB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

When troubleshooting a data device what is the first thing you should check?

A

dial tone and polarity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

What tool can you use to connect your butt set to a modular outlet?

A

banjo

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

Includes audio and video input/output ports; Audio input to AV receivers internal preamplifier; Audio output fed to system speakers; Video for selected device is fed from the receivers output jacks to connected video display

A

Audio/Video Receiver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

voltage =

A

current X resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

A device that allows the telephone company to route and connect customers to one another

A

Telephone Switch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

Visible fading of luminance between scan cycles on video displays

A

Flicker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

Creates a picture by shooting an electronic beam at a phosphor-coated glass screen

A

Cathode Ray Tube (CRT)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

talk battery

A

approx 3-9 VDC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

When multiple carriers oscillating at different frequencies are transported simultaneously in the same medium

A

Frequency Division Multiplexing (FDM)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

The cable modem has sent a ranging request upstream to the CMTS for transmit and timing information. If the modem does not get a response within 200 milliseconds, a __ Timeout occurs

A

T3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

What are the installation options for Xfinity Internet?

A

Self installation and professional installation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

(Known Level – Total Loss)

A

Expected Level

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

When a telephone is on-hook, there is a potential difference of 48 volts between the tip and ring. This is called?

A

Supervisory or idle voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

A passive signal splitting device, with minimum signal loss between the input port and the output port (through loss), a specified coupling loss between the input port and the tap port (tap or coupler loss), and very high loss between the output port and tap port (isolation)

A

Directional coupler

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

How would a teleworker customer add or disconnect accounts?

A

Teleworker order center

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
72
Q

Enables media files—movies, TV shows, music, and so on—to be played on TV, from various sources like computers, hard drives, the Internet, and media servers

A

Home Media Streaming

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
73
Q

Connect RF to power in order to prevent what?

A

Ranging

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
74
Q

What is the web address for most Comcast modems and eMTAs

A

http://192.168.100.1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
75
Q

Electromagnetic wave that generally falls in the frequency range of 3 kHz to 300 GHz

A

RF or Radio Frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
76
Q

Passage of outside signal into the cable is known as what?

A

Ingress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
77
Q

What are the 3 troubleshooting areas in CDV?

A

Before eMTA, At eMTA, After eMTA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
78
Q

Why is it improper to cut a center conductor a second time to (trim it) to fit a fitting?

A

A jagged center conductor can scratch the contacts inside the F-port creating reflections.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
79
Q

What frequency range is tested in a downstream Ingress resistance test?

A

88-108 MHz(FM Band) downstream

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
80
Q

The twists in CAT5 wire help to prevent these 2 things?

A

crosstalk, noise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
81
Q

What is ICFR?

A

In Channel Frequency Response

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
82
Q

Damage to the copper or silver skin of the center conductor will directly affect ____ _________ signals

A

high frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
83
Q

Out of the following colors: Green/Red Yellow/Black list the tip and ring.

A

green-tip, red-ring, yellow-ring, black-tip

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
84
Q

A general term for non-projection types of TVs, which include conventional tube TVs and flat-panel plasma and LCD TVs

A

Direct View TV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
85
Q

Older wiring is often referred to as ____________, or Category 1 (CAT 1) wire.

A

station wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
86
Q

An increase of 3 dB _______ the signal power

A

doubles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
87
Q

How many pairs should there be in a fax machine flat satin?

A

1 pair

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
88
Q

The method of displaying television pictures in which the picture is displayed in two halves (one of odd-numbered lines, one of even-numbered lines)

A

Interlaced scanning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
89
Q

A term used in IP telephony for methodologies and transmission techniques that manage the delivery of voice, using IP packets

A

Voice over Internet Protocol (VoIP)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
90
Q

What does the term POTS mean?

A

Plain Old Telephone System

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
91
Q

A home run system is also known as what?

A

Star topology

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
92
Q

Cable modems communicate with the CMTS every _________ to characterize network conditions

A

20 seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
93
Q

Keenness and depth of perception, discernment, or discrimination especially in practical matters

A

Acumen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
94
Q

Ideal if there is little or no space for a TV or projector; Can be hung on the wall; Can be plasma or LCD

A

Flat Panel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
95
Q

Performs a function similar to that of a cable amplifier’s equalizer. However, instead of equalizing the entire 50-860 MHz downstream or 5-42 MHz upstream, it deals with just a single channel.

A

Adaptive Equalization Technology

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
96
Q

Also known as Touch-Tone, this form of audio signaling was introduced by Western Electric in 1963

A

DTMF: Dual-tone multi-frequency signaling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
97
Q

What frequency range is tested in an upstream spectrum test?

A

5-42 MHz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
98
Q

What are the three main components of a home theater system?

A

Audio, Video, Environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
99
Q

The total REN value in an individual circuit should not be greater than?

A

5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
100
Q

DOCSIS supports frequencies anywhere between:

A

88 MHz and 860 MHz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
101
Q

What is QAM?

A

Quadrature Amplitude Modulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
102
Q

Aspect ratio of HDTV

A

16:9

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
103
Q

Signal leaking out of the system is known as what?

A

Egress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
104
Q

Coax attenuation specifications are based on:

A

100 feet of cable at 68 deg F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
105
Q

What four services are business class TV customers not eligible to receive?

A

DVR, VOD, Impulse Pay Per View (IPPV), Premium channel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
106
Q

The difference between transmitted and received power resulting from the loss through equipment, lines, or other transmission devices; usually expressed in decibels.

A

Attenuation

107
Q

A return path problem that is caused by the corrosion of dissimilar metals?

A

CPD

108
Q

All lights flashing on an eMTA indicate what type of problem?

A

Foreign Voltage

109
Q

What is our loop current?

A

23-40 mA

110
Q

MHz (Megahertz):

A

Equal to one million Hz. Video signal bandwidth is typically expressed in megahertz

111
Q

The twists in Category 3,5 and 6 wire help prevent __________ and cancel out noise that might be induced onto the wire from adjacent pairs or exposed wire.

A

cross talk

112
Q

_________circuits are almost always used in IP voice telephony

A

Loop start

113
Q

Signals propagate through either of two mediums

A

guided and unguided

114
Q

What ensures interoperability of cable modems from various manufacturers?

A

DOCSIS

115
Q

Is a measure of the ability of a circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output

A

Gain

116
Q

A telephone line dedicated to a specific subscriber. This line sends signals through the system, based on a subscriber making and receiving calls.

A

Subscriber Line

117
Q

Aims to support capacities of at least 10Gbit/s downstream and 1Gbit/s upstream

A

DOCSIS 3.1

118
Q

Anytime an RF signal changes by 3 dB, the signal power is either _______ (+3 dB) or ___ __ ____ (-3 dB)

A

doubledcut in half

119
Q

Delay associated with inconsistencies, or impairments, in the data transport stream.

A

Latency

120
Q

Allows customers to link home TVs from any PC or hand-held device

A

Slingbox

121
Q

What is the acceptable measurement for both the upstream spectrum test and the Ingress resistance test?

A

-30 dBmV or lower

122
Q

Images result when electrically charged gases illuminate colored phosphors

A

Plasma

123
Q

What must be placed between the eMTA and the customers telephones if they have an alarm system?

A

RJ31X

124
Q

6P6C connector -

A

6 wire - RJ25 – three phones

125
Q

What is CRT?

A

cathode ray tube

126
Q

how any levels of teleworkers are there?

A

2

127
Q

Series-7 cable bending radius:

A

4”

128
Q

CPE

A

Customer Premise Equipment

129
Q

High frequencies travel in the very ____ of the center conductor

A

skin

130
Q

The property of higher frequencies travelling on the outer portion of a conductor is called the ____ ______

A

skin effect

131
Q

Business Voice is transported over _____________________________, giving customers the clarity they expect.

A

Comcast’s private, advanced broadband network

132
Q

Business customers are required to sign a ______________________ in order to establish service.

A

service order agreement/contract

133
Q

In legacy telephone networks, talk battery and ring voltage come from the?

A

Central Office

134
Q

How far should seating be away from TV for Optimum viewing in a Home Theater setup?

A

Seating should be two times the diagonal wide-screen TV away from TV (example: seating should be 84” away from a 42” TV screen)

135
Q

The number one cause of ingress and egress occurs where in the system?

A

Drop system

136
Q

The transfer of energy from one device to another is most successful when both devices are of the same

A

Impedance

137
Q

At 50 MHz, 100 feet of RG6 cable loses roughly

A

1.5 dB

138
Q

How much REN do we suppoprt?

A

5

139
Q

5 factors of attenuation

A

Diameter of center conductor, Dielectric, Frequency, Temperature, Length of cable

140
Q

The demarcation point for Small Business Voice services is?

A

Network (left) side of the 66 block or if there isnt a block, The RJ telephone connector on the back of the eMTA

141
Q

The amount of pressure required to cause one ampere of current to flow through one ohm of resistance

A

One volt

142
Q

Allows an alarm panel to control access to active phone pairs, and seize those pairs even if the customer is using the telephone

A

Line seizure

143
Q

The number of times per second that the scan sequence is repeated from the top of the display

A

Vertical Scan Rate

144
Q

what is the major difference between the two teleworker service levels?

A

speed

145
Q

List the 4 main types of displays

A

Direct view, Rear Projection, Front projection, Flat Panel

146
Q

_____ ___________ utilize more of the cross-sectional area of the conductor and are more forgiving when it comes to imperfections in the copper plating

A

Lower frequencies

147
Q

Contrary to popular belief, the handset cord is not a ______________ It has been erroneously referred to as an RJ22, RJ10, or RJ9. It is simply a unique sized 4P4C connector designed for the handset.

A

registered jack

148
Q

Worldwide network of public circuit-switches used by traditional, local, and long-distance companies

A

Public Switched Telephone Network (PSTN)

149
Q

After __ T4s, the cable modem will reset

A

16

150
Q

The ability to make good judgments and quick decisions, typically in a particular domain

A

Business acumen

151
Q

MoCA 2.0 operates in the ___ - ____ MHz frequency range

A

500 - 1650

152
Q

List 2 types of call forwarding.

A

Selective, Variable

153
Q

What connection type provides both audio and video?

A

HDMI

154
Q

Separating successive frames into two types of video information—that which remains unchanged from frame to frame, and that which is updated frame to frame

A

Digital Compression

155
Q

Separating successive frames into two types of video information is also known as what?

A

compression

156
Q

Suite of applications that enable customers to enjoy the services they have from Comcast on as many platforms as possible

A

Converged Products:

157
Q

Typically private/professional businesses where food and/or alcohol is not sold for immediate consumption/not the main source of revenue.

A

Private View

158
Q

The number of scans from the left side of the display to the right and back that occur in one second

A

Horizontal Scan Rate

159
Q

What does DLNA stand for?

A

Digital Living Network Alliance

160
Q

The voice portion of the eMTA can interpret both

A

DTMF and pulse signaling

161
Q

If the power light is flashing on an eMTA it indicates what?

A

AC power failure

162
Q

DOCSIS

A

Data Over Cable Services Interface Specification

163
Q

Passage of an outside signal into the cable; can result in noise and disruption of the desired signal

A

Ingress

164
Q

Tiny dots that convey light and combine to form a video picture

A

Pixel

165
Q

ILEC

A

Incumbent Local Exchange Carrier

166
Q

What is it called when packets are received in the wrong order?

A

jitter

167
Q

Ground loop issues are basically caused by

A

A 60-cycle AC component in the audio connections

168
Q

6P2C connector -

A

2 wire – RJ11 – one phone

169
Q

The insulating material separating two conductors such as that between the center conductor and sheath in a coaxial cable

A

Dielectric

170
Q

An eMTA or modem that has not been activated receives a ____________boot file which allows it to communicate with our network but not surf the Internet

A

walledgarden

171
Q

Equation for calculating Exact Loss

A

Cable Loss + Passive Loss = Total Loss

172
Q

___________ circuits can be noisy and more susceptible to migration and corrosion

A

Ground start

173
Q

A signal of 0 dBmV corresponds to

A

1 mV across a 75-ohm impedance

174
Q

What frequencies are assigned to the downstream and upstream?

A

Up- 5-42 MhzDown- 54-1002 Mhz

175
Q

MoCA 1.1 operates in the ___ – ____ MHz frequencyrange

A

500 – 1500

176
Q

Consisting of a separate projector (typically placed on a table or ceiling-mounted) and screen; Can display images up to 20 feet across, or larger

A

Front Projection

177
Q

It is the process of modifying IP address information in IPv4 headers

A

NAT

178
Q

What does MoCA stand for?

A

Multimedia over Coax Alliance

179
Q

6P4C connector -

A

4 wire – RJ14 – two phones

180
Q

Load-sharing technique for logically combiningmultiple DOCSIS channels

A

Channel Bonding

181
Q

In a ____________ wiring configuration, the twisted-pair coming in from the NID goes, consecutively, through all the phone jacks

A

loop-through

182
Q

1 Baud equals ____, thus 9600 Baud is _______.

A

1 bps, 9.6kbps

183
Q

A network architecture developed by the cable industry, which typically uses fiber optic cables to bring signals to selected areas of the system called nodes, which are usually based on the number of subscribers to be served

A

Hybrid Fiber Coax (HFC)

184
Q

In earlier pulse dialing systems, noise generated in the copper pairs could be interpreted as a pulse by the switch rendering:

A

Wrong telephone numbers

185
Q

The number 1 cause of ingress and egress?

A

Poorly installed connectors

186
Q

Includes, but is not limited to, locations where the bulk of the revenue is derived from the sale of food and/or alcohol

A

Public View

187
Q

Provides a physical path along which the signals are transported; such as those used in cable TV

A

Guided media

188
Q

The adaptive equalizers are sent fresh commands for equalization every?

A

20 seconds

189
Q

Internet phone services transmit calls over a ______ network.

A

Public

190
Q

Creates images by passing light through a layer of liquid crystal sandwiched between two panes of polarized glass.

A

Liquid Crystal Display(LCD)

191
Q

4-pin video only connector

A

S-Video

192
Q

Operate components located throughout the household; Generates signals of given radio frequency

A

RF Remotes

193
Q

A site where telecommunications companies (such as cellular and long-distance providers) physically interconnect their systems with other networks (such as local telephone companies or cable companies)

A

Point of Presence (POP)

194
Q

A flow of IP data supplied to a processor at a rate fast enough forreal-time decoding

A

Streaming

195
Q

The condition that results when two components of a system are operating at a different impedance

A

Impedance Mismatch

196
Q

In North America, a ____ pattern is the standard ring cycle.

A

2-4, two seconds of ring voltage followed by a four-second pause

197
Q

4P4C connector -

A

4 wire (handset coil cord)

198
Q

A measure of the received carrier strength relative to the strength of the received noise

A

Carrier to Noise (C/N) ratio

199
Q

A condition caused when packets are not received in the correct order, or when they take too long to arrive at their destination.

A

Jitter

200
Q

Three components of an electrical circuit:

A

Voltage, Current, Resistance

201
Q

Once a cable modem is online, it continues to communicate with the CMTS. The modem watches for Keep Alive requests from the CMTS. If it does not receive one after 30 seconds, a __ timeout occurs.

A

T4

202
Q

MPEG identifies and removes what type of information between successive frames of the picture?

A

Redundant / Static

203
Q

Comcast has allocated downstream DOCSIS carriers to be located in the higher end of the downstream bandwidth, somewhere between:

A

500 and 700 MHz

204
Q

Be sure that the alarm system is in ________ before beginning work, to ensure that an alarm is not triggered

A

Test Mode

205
Q

MoCA 2.0: offers net throughput MAC rates of ________(baseline mode) and _______ (enhanced mode)

A

400 Mbps800 Mbps

206
Q

Uses an RCA connector to Analog Audio

A

Stereo Connection

207
Q

Identifies and removes redundant information between successive frames of the picture

A

MPEG compression

208
Q

RCA wiring that uses Yellow Red and White connectors

A

Composite video

209
Q

Latent or out-of-sync audio

A

Lip-Sync

210
Q

What is the measure of voice, data and or video quality provided to a customer called?

A

Quality of Service (QoS)

211
Q

One coulomb passing a given point in one second is equivalent to

A

One amp

212
Q

With station wire the_____ and___ wires are used for the primary line.

A

green, red

213
Q

In a home-run wiring configuration, also known as ____, each outlet is fed directly from a central location

A

star

214
Q

Boosts low level signals from the components to the speakers.

A

Amplifier

215
Q

DOCSIS 3.0 released; it supported enhanced upstream and downstream transmission speeds and Internet Protocol version 6 (IPv6).

A

August 2006

216
Q

A customer can access Enhanced Voicemail while away from home bypressing

A

, once the greeting begins

217
Q

What is a rugged, inexpensive to repair bandwidth versatile transmission medium?

A

Coaxial cable

218
Q

The different types of audio formats are:

A

Mono, Stereo, Surround Sound

219
Q

The three main components of a Home Theater system are:

A

Audio, Video, Environment

220
Q

Two versions of Business TV:

A

Private ViewPublic View

221
Q

Can be water or the air around us. The signal is transmitted from a transmit antenna to a receive antenna

A

Unguided media

222
Q

The modem scans the downstream QAM channels, looking for an upstream channel descriptor. A __ occurs if the cable modem does not find one within a few seconds

A

T1

223
Q

Some ILECs utilize “______________,” a service that keeps talk battery on the pairs even if the location no longer subscribes to their phone service

A

soft dial tone

224
Q

Formula for voltage

A

E=IxR

225
Q

What is the 4 step troubleshooting process?

A

Identify, Isolate, Repair, Verify

226
Q

What does EDTV stand for?

A

Enhanced Definition TV

227
Q

What does VOIP stand for?

A

Voice Over Internet Protocol

228
Q

The common progressive scan standards that you will see are:

A

480p, 720p, and 1080p

229
Q

Toslink or EIA-J are types of what?

A

Optical Digital Audio connectors

230
Q

Only _________ alarm systems should be connected to the phone service

A

monitored

231
Q

DOCSIS 2.0 released, to meet the demand for enhanced upstream transmission speeds

A

December 2001

232
Q

A standard for home entertainment networking in which existing subscriber drop coaxial cabling and components are used to interconnect set-top boxes

A

MoCA

233
Q

All FM radio stations transmit in a band of frequencies between:

A

88 and 108 MHz

234
Q

Multiple carriers oscillating at different frequencies transported in the same medium is what?

A

Frequency Division Multiplexing

235
Q

What does REN stand for?

A

Ring equivalency number

236
Q

When an eMTA is upgrading firmware what lights are flashing?

A

U/S and D/S

237
Q

What type of cable is needed to backfeed an eMTA to a wallplate?

A

electrically straight

238
Q

What is the resolution of EDTV?

A

480p

239
Q

Uses an RCA connector to carry Digital Audio

A

SPIF coax cable (Coaxial Digital connection)

240
Q

What is an internet product for companies that have a mobile workforce?

A

Teleworker

241
Q

There are three significant considerations in a Home Theater application

A

Audio quality, Audio formats, Audio equipment

242
Q

What is the delay between transmission and arrival of a packet?

A

latency

243
Q

Some routers come with a ___________option which, when enabled, essentially disables the networking functionality and the gateway basically becomes a modem.

A

Bridge Mode

244
Q

What is the name of the dial tone a customer will hear when they have voicemail?

A

stutter

245
Q

Projects light from microscopic mirrors onto big, widescreen, rear-projection TVs (or micro-displays)

A

Digital Light Processing(DLP)

246
Q

what are four benefits to an employer who uses teleworker?

A

Single contract, unified billing, online ordering and management, business class customer support

247
Q

A measurement of how consistent the signal response is from the beginning to the end of the channel space

A

ICFR

248
Q

8P8C connector -

A

8 wire – RJ45 - Ethernet

249
Q

The cumulative effect of ingress from multiple homes is known as what?

A

Funnel effect

250
Q

DOCSIS 1.0 issued

A

March 1997

251
Q

Name four COMCAST business services

A

TV, Phone, Internet, Teleworker, (smartoffice)

252
Q

What defines where COMCAST may physically disconnect a customer from the ILEC network?

A

Interconnection Agreement

253
Q

The electromotive force (or pressure) that causes electrons to flow in a circuit

A

Voltage (E)

254
Q

what are four benefits of teleworker for employees?

A

Multiple connections, comcast.net email, after hours use, Portal services

255
Q

A subunit of a larger unit called the bel:

A

decibel

256
Q

Exceptions to opening the alarm panel:

A

When you do not know the color/pair of inside wiring that has been previously used to supply dial tone from the NID to the RJ31XWhen you need to isolate a trouble condition

257
Q

Voice packets are given priority over other types of data traveling within the Comcast network. This managed delivery ensures high-quality voice packet interpretation.

A

Dynamic Quality of Service (DQoS)

258
Q

Excess debris left in a punch down block that can cause a short is known as?

A

shiners

259
Q

Standard television pictures are composed of ___ horizontal lines that scan across the screen in less than the blink of an eye

A

480

260
Q

The Top 5 Types of Connector Problems

A
  1. Moisture damage2. Long/short center conductor3. Connector not tightened to port4. Braid removed or too short/long5. Improper connector for cable type
261
Q

Upstream carriers are currently located somewhere between:

A

5 and 42 MHz

262
Q

Latent or out of sync audio is known as?

A

Lip sync

263
Q

List the 3 pairs in order of older station wire?

A

Green/Red Black/Yellow White/Blue

2018 MM (59 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions