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WorksheetsMultimedia Networking Quiz
Total questions: 15
Worksheet time: 8mins
Which of the following best describes the primary goal of "Recovering from Packet Loss" in multimedia networking?
To increase network bandwidth.
To reduce the number of devices in a network.
To ensure data integrity and maintain a high Quality of Service (QoS).
To encrypt data for security purposes.
What are the two key mechanisms employed by Automatic Repeat reQuest (ARQ) protocols to ensure reliable data transmission?
Encryption and decryption.
Compression and decompression.
Acknowledgments and timeouts.
Routing and switching.
In Stop-and-Wait ARQ, what must the sender do after transmitting a data packet before sending the next one?
Transmit all remaining packets.
Wait for a negative acknowledgment (NACK).
Wait for an acknowledgment (ACK) for the previous packet.
Increase its transmission window size.
A sender transmits packets 1, 2, 3, 4, 5, 6. If packet 3 is lost and the system uses Go-Back-N ARQ, which packets will the sender typically retransmit?
Only packet 3.
Packets 1, 2, and 3.
Packets 3, 4, 5, and 6.
All packets from 1 to 6.
Which ARQ protocol is considered the most efficient for high-bandwidth networks with scattered packet loss because it retransmits only the specific lost or corrupted packets?
Stop-and-Wait ARQ
Go-Back-N ARQ
Selective Repeat ARQ
Hybrid ARQ
What is the primary advantage of Forward Error Correction (FEC) over Automatic Repeat reQuest (ARQ) for real-time multimedia applications?
FEC adds less bandwidth overhead.
FEC eliminates the need for any error detection.
FEC allows the receiver to correct errors without retransmission, reducing latency.
FEC encrypts data more securely.
What is a "burst error" in data transmission?
An error that affects only one bit at a time.
An error that causes the network to shut down.
An error where two or more consecutive bits in a data unit have changed.
An error that only occurs in wireless networks.
Which FEC technique reorganizes existing data packets before transmission to disperse the impact of burst errors, without adding extra redundant data?
Piggyback-based approach.
Checksum appending.
Selective Repeat.
Interleaving.
Which two protocols are primarily responsible for end-to-end transport functions suitable for real-time data like audio and video, and typically run over UDP?
TCP and IP.
HTTP and FTP.
RTP and RTCP.
SMTP and POP3.
Which transport layer protocol prioritizes reliability, guaranteed delivery, and ordered delivery, making it suitable for applications like file transfers and video-on-demand?
UDP (User Datagram Protocol)
ICMP (Internet Control Message Protocol)
TCP (Transmission Control Protocol)
IGMP (Internet Group Management Protocol)
For which type of application is UDP (User Datagram Protocol) typically preferred over TCP, due to its speed and low latency, even with the possibility of packet loss?
Downloading large software updates.
Sending and receiving emails.
Live video streaming and online gaming.
Secure web browsing (HTTPS).
What is the primary function of the Real-time Streaming Protocol (RTSP) in multimedia networking?
To transfer the actual audio and video data stream.
To compress multimedia files for efficient transmission.
To control the delivery of real-time multimedia data from a media server (e.g., PLAY, PAUSE commands).
To ensure the security of multimedia content.
Which transport layer protocol is typically used by RTSP for its control messages, to ensure reliability of commands like SETUP and PLAY?
UDP
RTP
ICMP
TCP
In a multimedia protocol stack, which layer is responsible for logical addressing and routing packets across different networks, commonly using IP?
Application Layer
Transport Layer
Network Layer
Data Link Layer
What is the main drawback of Interleaving as an FEC technique for conversational applications like VoIP?
It increases bandwidth requirements significantly.
It relies on retransmissions, causing delays.
It introduces an initial playout delay due to buffering for de-interleaving.
It can only correct single-bit errors.
