Chapter 12 Quiz Flashcards

1
Q

All VoIP calls are carried over the Internet.
True
False

A

False

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2
Q

IP telephones are directly connected to the local loop.
True
False

A

False

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3
Q

An off-the-shelf workstation can be programmed to act like an IP telephone.
True
False

A

True

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4
Q

SIP and H.323 account for communication between media gateways.
True
False

A

False

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5
Q

It is more difficult to transmit VoIP and video over IP signals over a packet-switched network than it is to transmit data signals.
True
False

A

False

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6
Q

____ is the use of one network to simultaneously carry voice, video, and data communications.
Multicasting
Unicasting
Divergence
Convergence

A

Convergence

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7
Q

____ describes the use of any network to carry voice signals using the TCP/IP protocol.
Telephony
Internet telephony
IP telephony
Voice telephony

A

IP telephony

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8
Q

When VoIP relies on the Internet, it is often called ____.
telephony
Internet telephony
IP telephony
voice telephony

A

Internet telephony

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9
Q

IPTV, videoconferencing, streaming video, and IP multicasting belong to the range of services known as ____.
voice over IP
data over IP
video over IP
Web over IP

A

video over IP

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10
Q

____ messaging is a service that makes several forms of communication available from a single user interface.
Unified
Instant
Diversified
Open

A

Unified

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11
Q

Using VoIP over a WAN allows an organization to avoid paying long-distance telephone charges, a benefit known as ____.
charge bypass
distance bypass
toll bypass
easypass

A

toll bypass

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12
Q

When using an analog telephone, a VoIP adapter that performs analog-to-digital conversion is known as a(n) ____.
VTA (voice telephone adapter)
ATA (analog telephone adapter)
DTA (digital telephone adapter)
DTA (data telephone adapter)

A

ATA (analog telephone adapter)

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13
Q

In general, a(n) ____ is a private switch that accepts and interprets both analog and digital voice signals.
IP-PBX
analog PBX
Data PBX
IT-PBX

A

IP-PBX

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14
Q

When a caller uses an IP telephone, his or her voice is immediately digitized and issued from the telephone to the network in ____ form.
segment
frame
circuit
packet

A

packet

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15
Q

A computer programmed to act like an IP telephone is known as a(n) ____.
video phone
softphone
streaming server
compu-phone

A

softphone

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16
Q

The popular Internet telephony software, Skype, is a type of ____.
IP telephone
softphone
teleapplication
compu-phone

A

softphone

17
Q

Among all video-over-IP applications, ____is perhaps the simplest.
VoIP
videoconferencing
IPTV
streaming video

A

streaming video

18
Q

One drawback to ____ video is that content may not be edited before it’s distributed.
on demand
live streaming
streaming server
VoIP

A

live streaming

19
Q

Many streaming video services - and nearly all of those issued over a public network, such as the Internet - are examples of ____ transmissions.
multicast
broadcast
unicast
telecast

A

unicast

20
Q

When more than two people participate in a videoconference, for example, in a point-to-multipoint or multipoint-to-multipoint scenario, a video ____ is required.
bridge
switch
gateway
router

A

bridge

21
Q

____ signaling functions are more limited than those performed by the protocols in the H.323 group.
RTCP
MGC
MEGACO
SIP

A

SIP

22
Q

SIP and H.323 regulate ____ for VoIP or video-over-IP clients and servers.
call signaling only
control only
call signaling and control
communication between media gateways

A

call signaling and control

23
Q

A(n) ____ is a computer that manages multiple media gateways.
MPLS
MGCP
MEGACO
MGC

A

MGC

24
Q

Many network engineers consider ____ to be superior to MGCP.
SIP
RTCP
MEGACO
MGC

A

MEGACO

25
Q

____ is preferred over TCP for real-time applications such as telephone conversations and videoconferencing.
RTP
UDP
RTCP
SIP

A

UDP

26
Q

____ is a measure of how well a network service matches its expected performance.

A

QoS