1. Which of the following should be replaced with question mark in the figure shown below ?

a) SMTP
b) HTTP
c) SIP
d) None of the mentioned

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2. Point out the correct statement:
a) SHOUTcast is best known for its SHOUTcast Radio
b) SHOUTcast is a proprietary server solution for streaming media on the Internet
c) NPR started out providing RealAudio files for streaming and then added Windows Media files as a second format
d) All of the mentioned

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3. Which of the following is the most commonly used VoIP standard ?
a) SDP
b) IMS
c) SIP
d) None of the mentioned

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4. Which of the following is more light weight protocol among listed below ?
a) H.323
b) MGCP
c) SIP
d) All of the mentioned

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5. Point out the wrong statement:
a) H.323 is used on short transmission lines
b) POTS is also referred to as the Public Switched Telephone Network (PSTN)
c) The ITU-T is the standards body for PSTN
d) None of the mentioned

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6. The Skype protocol is a proprietary (closed-source) protocol, parts of which use the Global Index ______ protocol.
a) C2C
b) P2P
c) RTCP
d) None of the mentioned

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7. Which of the following encryption method or algorithm is used in Skype communication ?
a) AES
b) DES
c) SHA
d) None of the mentioned

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8. Which of the following feature is supported by Skype application ?
a) Message logging
b) Instant messaging
c) File transfers
d) All of the mentioned

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9. How many streaming service does Google have which uses VoIP protocols ?
a) 2
b) 3
c) 4
d) All of the mentioned

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10. Google Talk is a service that uses the ______ protocol for the Google Chat IM client.
a) QuickTime
b) Jabber
c) Jaspersoft
d) None of the mentioned

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ANSWERS

1. c
Explanation:Voice over IP or VoIP is a set of communication protocols for delivering voice over the Internet.

2. d
Explanation:National Public Radio is a very good example of how audio streaming has evolved.

3.  b
Explanation:IMS stands for IP Multimedia Subsystem.

4.  c
Explanation:MGCP stands for Media Gateway Control Protocol.

5.  a
Explanation:H.323 is used on short transmission lines.

6.  b
Explanation:Skype uses the peer-to-peer model that was based on Kazaa.

7.  a
Explanation:Skype communication is encrypted using standard encryption methods.

8.  d
Explanation:Skype is perhaps the most widely used telephony application in the world.

9.  a
Explanation:Google has two streaming services that use VoIP protocols: Google Talk and Google Voice.

10.  b
Explanation:Google Voice is Google’s telephony application, which is also a VoIP service.