Question 1

Carrying voice across the Internet is referred to as VoIP.

Accepted Answer

VoIP stands for Voice over Internet Protocol, which is a technology that allows for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.

Question 2

The three devices required to set up a VoIP call are:
A) Media Gateway, Frame Switch, SIP Proxy
B) Media Gateway, Application Server, SIP Proxy
C) Media Gateway, Media Gateway Controller, Signaling Proxy
D) None of the above

Accepted Answer

C) Media Gateway, Media Gateway Controller, Signaling Proxy are essential components for setting up a VoIP call. The Media Gateway connects different types of networks, the Media Gateway Controller manages the gateways, and the Signaling Proxy handles signaling for call setup and management.

Question 3

The IPCC stands for the ________ ________ ________ ________.

Accepted Answer

International Packet Communications Consortium

Question 4

Voice traffic traveling across the Internet is encapsulated in what layer 3 protocol _______.

Accepted Answer

The answer of Voice traffic traveling across the Internet is...

Question 5

A media gateway has to be located in every large city or regional office where VoIP service is provided.

Accepted Answer

A media gateway does not necessarily have to be located in every large city or regional office where VoIP service is provided. VoIP services can be delivered over long distances and through various network configurations without the need for a media gateway in every location, thanks to the internet and advanced networking technologies.

Question 6

The media gateway controller performs the same functions as a class ________ switch.

Accepted Answer

The answer of The media gateway controller performs the same...

Question 7

The media gateway controller may reside in any location as long as it has Internet connectivity.

Accepted Answer

The media gateway controller, which manages signaling and controls call processing, can indeed be located anywhere as long as it has a stable Internet connection to communicate with the media gateways and other components of the network.

Question 8

The traditional switching network was referred to as ________ switch architecture and the new VoIP service is referred to as a ________ switch architecture.
A) Consolidated, Distributed
B) Distributed, Consolidated
C) Hierarchical, Distributed
D) Hierarchical, Classful
E) None of the above

Accepted Answer

The answer of The traditional switching network was referred to...

Question 9

Two common signaling protocols utilized in the VoIP network are ________ and ________.

Accepted Answer

The answer of Two common signaling protocols utilized in the...

Question 10

Dial-tone coming from VoIP service sounds different than traditional dial-tone.

Accepted Answer

The dial-tone from VoIP service is designed to mimic the traditional dial-tone closely, so users have a familiar experience and often cannot tell the difference based on the sound alone.

Question 11

A SIP Proxy is used to:
A) Interpret and step up calls, tear down calls - all signaling functions related to calls.
B) Bill the customer.
C) Interrogate the call flow to determine call quality.
D) None of the above.

Accepted Answer

A SIP Proxy primarily handles the signaling for setting up, managing, and tearing down calls. It does not directly handle billing or call quality interrogation, which are functions typically managed by other systems or components in a VoIP infrastructure.

Question 12

VoIP service uses the ________ layer 4 protocol.
A) TCP
B) RTCP
C) RTP
D) UDP
E) None of the aboveF) All of the above

Accepted Answer

VoIP (Voice over Internet Protocol) primarily uses the UDP (User Datagram Protocol) at layer 4 because it allows for faster transmission of data without the overhead of error-checking, which is suitable for real-time voice communication.

Question 13

RTCP is used to monitor and quantify call quality.

Accepted Answer

RTCP (Real-Time Control Protocol) is used in conjunction with RTP (Real-Time Protocol) to monitor transmission statistics and quality of service (QoS) for media streaming, thus helping to quantify and manage call quality.

Question 14

The layer 4 and 3 protocols used to carry VoIP across the Internet are:
A) TCP/IP
B) UDP/IP
C) UDP/IPX
D) RTP/IP
E) All of the above

Accepted Answer

VoIP typically uses UDP/IP because UDP is faster and more efficient for real-time communication like voice, where speed is prioritized over reliability.

Question 15

Delay causes the user to experience
A) choppiness
B) talk over
C) dropped calls
D) all of the above

Accepted Answer

Delay in communication networks can cause choppiness in audio or video, talk over (where participants interrupt each other because they don't realize the other person is speaking due to the delay), and dropped calls if the delay disrupts the communication flow significantly.

Question 16

The term MOS score stands for ________ and is used as a call quality metric.
A)Method Operational Score
B) Measuring the Operational System
C) Mean Opinion Score
D) None of the above

Accepted Answer

The term MOS score stands for Mean Opinion Score and is widely used as a metric to evaluate the quality of voice calls in telecommunications.

Question 17

A MOS score of 2 indicates the call was:
A) Very good
B)Good
C) Fair
D) Poor

Accepted Answer

A MOS (Mean Opinion Score) score of 2 indicates the call quality was poor. MOS scores range from 1 to 5, with 1 being the worst quality and 5 being the best.

Question 18

A MOS score of 4.2 indicates the call quality was:
A) Toll quality
B) Cell phone quality
C) Satellite quality
D) None of the above

Accepted Answer

A MOS (Mean Opinion Score) of 4.2 is considered to be toll quality, which is high-quality voice transmission often associated with traditional landline telephone calls.

Question 19

The three key metrics used to qualify a VoIP call during troubleshooting are:
A) Audio test, MOS Score, Voltage Level
B) Latency, packet loss, jitter
C) MOS, RScore, Jitter
D) Latency, choppiness, echo

Accepted Answer

B) Latency, packet loss, and jitter are the three key metrics used to qualify a VoIP call during troubleshooting because they directly affect the quality and reliability of the call.

Question 20

Switch features reside within the local media gateway.

Accepted Answer

Switch features are typically part of the central office or network infrastructure, managing data paths in a network, not within a local media gateway, which connects different types of networks.

Quiz 11: Distributed Switching Architecture - Voice Over IP

Carrying voice across the Internet is referred to as VoIP.

The three devices required to set up a VoIP call are:

The IPCC stands for the .

Voice traffic traveling across the Internet is encapsulated in what layer 3 protocol _______.

A media gateway has to be located in every large city or regional office where VoIP service is provided.

The media gateway controller performs the same functions as a class ________ switch.

The media gateway controller may reside in any location as long as it has Internet connectivity.

The traditional switching network was referred to as switch architecture and the new VoIP service is referred to as a switch architecture.

Two common signaling protocols utilized in the VoIP network are and .

Dial-tone coming from VoIP service sounds different than traditional dial-tone.

A SIP Proxy is used to:

VoIP service uses the ________ layer 4 protocol.

RTCP is used to monitor and quantify call quality.

The layer 4 and 3 protocols used to carry VoIP across the Internet are:

Delay causes the user to experience

The term MOS score stands for ________ and is used as a call quality metric.

A MOS score of 2 indicates the call was:

A MOS score of 4.2 indicates the call quality was:

The three key metrics used to qualify a VoIP call during troubleshooting are:

Switch features reside within the local media gateway.