Multimedia Networking Quiz

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)