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      Question

      In a real-time video conferencing application, users

      report delays and poor video quality. Which QoS mechanism would most effectively address the issue?
      A Best-effort service Correct Answer Incorrect Answer
      B FIFO queuing Correct Answer Incorrect Answer
      C Priority queuing Correct Answer Incorrect Answer
      D Traffic shaping Correct Answer Incorrect Answer
      E Token bucket filtering Correct Answer Incorrect Answer

      Solution

      Traffic shaping manages the flow of network traffic to ensure a smooth delivery experience. By controlling the rate at which data packets are sent, it minimizes congestion and optimizes bandwidth for real-time applications like video conferencing. 1. It smoothens bursty traffic patterns, reducing jitter and delay, which are critical for video streams. 2. Ensures a steady flow of packets, preventing abrupt network overloads. 3. Helps prioritize video conferencing traffic over less critical data transfers, improving overall quality. Why Other Options Are Incorrect: β€’ A) Best-effort service: Offers no guarantees for delay-sensitive applications. β€’ B) FIFO queuing: Processes packets in order, but does not prioritize critical traffic. β€’ C) Priority queuing: Provides preference to specific traffic types but does not control traffic flow rates. β€’ E) Token bucket filtering: Controls packet bursts but is less effective for sustained traffic regulation.

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