Deck 11: Distributed Switching Architecture - Voice Over IP

Question 1

Carrying voice across the Internet is referred to as VoIP.

Answer 1

True

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

Answer 2

Media Gateway, Media Gateway Controller, Signaling Proxy

Question 3

The IPCC stands for the ________ ________ ________ ________.

Answer 3

International Packet Communications Consortium

Question 4

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

Question 5

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

Question 6

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

Question 7

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

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

Question 9

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

Question 10

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

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.

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

Question 13

RTCP is used to monitor and quantify 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

Question 15

Delay causes the user to experience

A) choppiness
B) talk over
C) dropped calls
D) all of the above

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

Question 17

A MOS score of 2 indicates the call was:

A) Very good
B)Good
C) Fair
D) Poor

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

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

Question 20

Switch features reside within the local media gateway.

Question 21

Switch features reside within the local media gateway.

Question 22

A softswitch contains a feature set comparable to a traditional circuit switch.

Question 23

A device referred to as a ________ adapter interfaces with the customers traditional ________ telephone set.

A) voice, digital
B) MTA, analog
C) ATA, analog
D) ATA, digital
E) MTA, digital
F) both b and c
G) both d and e

Question 24

A softphone connects directly to the PC.

Question 25

A call between a VoIP end point and a traditional PSTN phone requires a handoff between the ________ network and ________ network.

A) IP to PSTN
B) Access to PSTN
C) IP to PSTN to IP
D) IP to ATM to IP
E) None of the above

Question 26

A VoIP call that stays on-net travels between the ________ network and the ________ network.

A) IP to IP other than using outside SS7 signaling network.
B) IP to IP
C) IP to PSTN to IP
D) IP to local PSTN to local PSTN to IP
E) None of the above

Question 27

The major drawback associated with VoIP service is the lack of E911 capability.

Question 28

A phone connected to a VoIP device functions in the same way as a traditional telephone circuit.

Question 29

Dial-tone across all jacks in the home is not possible with VoIP service.

Question 30

The customer can keep their existing telephone number when they transfer to VoIP service.

Question 31

When the power goes out VoIP service continues to work.