Question 1

In Voice Over IP, Term SIP stands for
A)session initiation protocol.
B)session initiation port.
C)session initiation path.
D)session initiation packet.

Accepted Answer

SIP stands for Session Initiation Protocol, which is a signaling protocol used for initiating, maintaining, managing, and terminating real-time sessions that involve video, voice, messaging, and other communications applications and services between two or more endpoints on IP networks.

Question 2

In Real-Time Transport Protocol (RTP), A source sends a bye message to shut down a
A)system.
B)frames.
C)ip.
D)stream.

Accepted Answer

In Real-Time Transport Protocol (RTP), a source sends a bye message to shut down a stream, indicating the end of participation in the streaming session.

Question 3

In Audio and Video Compression, term RBG expresses
A)red, blue, green.
B)red, black, grey.
C)rate, bit, giga bit.
D)red, bluish, greyish.

Accepted Answer

RGB stands for Red, Green, Blue, which are the primary colors used in electronic displays to create a wide range of colors.

Question 4

To perform tracking of an IP, Session Initiation Protocol (SIP), uses concept of
A)registration.
B)termination.
C)streaming.
D)translation.

Accepted Answer

SIP uses the concept of registration to perform tracking of an IP. This process allows SIP servers to know the current location of the user's endpoint (IP address) to correctly route incoming calls and messages.

Question 5

A simple session using Session Initiation Protocol (SIP), consists of three modules: establishing, communicating, and
A)transmission.
B)system.
C)streaming.
D)terminating.

Accepted Answer

A simple session using SIP involves establishing the session, communicating, and then terminating the session. Transmission, system, and streaming are not specific stages of a SIP session.

Question 6

Real-time traffic needs support of
A)multicasting.
B)translation.
C)integration.
D)security.

Accepted Answer

Real-time traffic often requires multicasting to efficiently deliver data to multiple recipients simultaneously, which is crucial for applications like live streaming and video conferencing.

Question 7

Session Initiation Protocol (SIP), is designed to be independent of underlying
A)linear layer.
B)lower layer.
C)transport layer.
D)protocol layer.

Accepted Answer

SIP is designed to be independent of the transport layer, meaning it can operate over different transport protocols like TCP, UDP, or SCTP.

Question 8

In Real Time Interactive Audio Video, data are stored in buffer at a possibly variable
A)pixels.
B)packets.
C)rates.
D)bytes.

Accepted Answer

In real-time interactive audio and video, data is often buffered at variable rates to accommodate fluctuations in network conditions and ensure smooth playback.

Question 9

In Real Time Interactive Audio Video, to prevent jitter, we can time-stamp packets and separate arrival time from the
A)frame time.
B)playback time.
C)pixels time.
D)packet time.

Accepted Answer

To prevent jitter in Real Time Interactive Audio Video, packets are time-stamped to separate their arrival time from their playback time. This allows for the buffering and synchronized playback of the audio and video streams, despite variations in network delay.

Question 10

Real-time Transport Protocol (RTP) is protocol designed to handle real-time traffic on the
A)frames.
B)internet.
C)ip.
D)protocol.

Accepted Answer

RTP is specifically designed to handle real-time traffic on the internet, providing end-to-end network transport functions suitable for applications transmitting real-time data, such as audio, video, or simulation data, over multicast or unicast network services.

Question 11

In Session Initiation Protocol (SIP), session can be terminated with a
A)ok message.
B)bye message.
C)terminate message.
D)quit message.

Accepted Answer

The correct way to terminate a session in SIP (Session Initiation Protocol) is by sending a "BYE" message. This message is used by either the caller or callee to indicate that the call is over.

Question 12

RTCP stands for
A)real-time transport control program.
B)real-time transport control packet.
C)real-time transport control protocol.
D)real-time transport control path.

Accepted Answer

RTCP stands for Real-Time Transport Control Protocol, which is used in conjunction with the Real-Time Protocol (RTP) to monitor transmission statistics and quality of service for streaming audio and video.

Question 13

A compressed audio/video file can be downloaded as a
A)image.
B)video.
C)frame.
D)text file.

Accepted Answer

A compressed audio/video file can be downloaded as a text file.

Question 14

When a caller needs to communicate with callee, caller can use e-mail address instead of IP address in the
A)ok message.
B)bye message.
C)invite message.
D)great message.

Accepted Answer

In SIP (Session Initiation Protocol), which is used for initiating, maintaining, and terminating real-time sessions that include voice, video and messaging applications, the INVITE message is used to initiate a call or session. The INVITE message can include a variety of information, including the caller's and callee's SIP URIs, which can resemble email addresses. This is because SIP addresses use a user@domain format, similar to email addresses, allowing for easier identification and communication between parties. The other options, such as OK, BYE, and a non-existent "great" message, serve different purposes in the SIP protocol and are not used for initiating a session with an email-like address.

Question 15

In Real Time Interactive Audio Video, a sequence number on each packet is required for
A)real-time traffic.
B)real-time playback.
C)real-time pixels.
D)real-time frames.

Accepted Answer

A sequence number on each packet is required for real-time traffic to ensure that the packets are received in the correct order.

Question 16

Before audio or video signals can be sent on Internet, they need to be
A)channelized.
B)managed.
C)digitized.
D)organized.

Accepted Answer

Before audio or video signals can be sent over the Internet, they need to be converted into a digital format, which is referred to as being digitized. This process involves converting the analog signals into a series of 0s and 1s so that they can be transmitted over digital networks like the Internet.

Question 17

For speech, we need to compress digitize signals at
A)128 khz.
B)256 khz.
C)64 khz.
D)1152 khz.

Accepted Answer

For speech signals, a common sampling rate used for digitization is 64 kHz. This rate is sufficient to capture the frequency range of human speech, which typically extends up to about 20 kHz, adhering to the Nyquist theorem that the sampling rate should be at least twice the highest frequency present in the signal.

Question 18

Moving Picture Experts Group (MPEG-1), was designed for a
A)pc.
B)cd.
C)dvd.
D)floppy.

Accepted Answer

MPEG-1 was designed for encoding video and audio onto digital storage media at about 1.5 megabits per second (Mbit/s), which is the data rate of a CD (Compact Disc).

Question 19

Perceptual encoding is based on science of
A)frames.
B)music.
C)rhythm.
D)psychoacoustics.

Accepted Answer

Perceptual encoding, especially in the context of audio and sound, is based on the science of psychoacoustics. Psychoacoustics is the study of the psychological and physiological responses associated with sound, including how we perceive frequencies, loudness, and the spatial location of sounds.

Question 20

Media player uses URL in metafile to access media server to
A)download file.
B)upload file.
C)stored the file.
D)stream file.

Accepted Answer

The answer of Media player uses URL in metafile to...

Quiz 2: Understanding the Fundamentals of Voice and Video Communication Technologies

In Voice Over IP, Term SIP stands for

In Real-Time Transport Protocol (RTP) , A source sends a bye message to shut down a

In Audio and Video Compression, term RBG expresses

To perform tracking of an IP, Session Initiation Protocol (SIP) , uses concept of

A simple session using Session Initiation Protocol (SIP) , consists of three modules: establishing, communicating, and

Real-time traffic needs support of

Session Initiation Protocol (SIP) , is designed to be independent of underlying

In Real Time Interactive Audio Video, data are stored in buffer at a possibly variable

In Real Time Interactive Audio Video, to prevent jitter, we can time-stamp packets and separate arrival time from the

Real-time Transport Protocol (RTP) is protocol designed to handle real-time traffic on the

In Session Initiation Protocol (SIP) , session can be terminated with a

RTCP stands for

A compressed audio/video file can be downloaded as a

When a caller needs to communicate with callee, caller can use e-mail address instead of IP address in the

In Real Time Interactive Audio Video, a sequence number on each packet is required for

Before audio or video signals can be sent on Internet, they need to be

For speech, we need to compress digitize signals at

Moving Picture Experts Group (MPEG-1) , was designed for a

Perceptual encoding is based on science of

Media player uses URL in metafile to access media server to