300-445 Question 115
Select 3An enterprise network team is troubleshooting poor performance issues with a video conferencing application. Users are experiencing delays in conversations, choppy audio, and inconsistent video quality. Which combination of network characteristics should the team investigate to resolve the problem?
- A
Packet loss
- B
Jitter
- C
Latency
- D
Bandwidth utilization
- E
DNS lookup times
Show answer and explanation
Correct answers: A, B, C
Explanation
Video conferencing applications are highly sensitive to network characteristics like packet loss, jitter, and latency. Packet loss disrupts the continuity of audio and video streams, while jitter affects the timing consistency of packet delivery. High latency introduces delays that can make real-time communication impractical. While bandwidth and DNS lookup times are important in other scenarios, they are not the primary contributors to the specific issues described in this case.
- A. Correct.
Packet loss directly affects video and audio stream continuity. Even small amounts of lost packets can result in choppy audio and missing video frames, making it a critical factor to investigate.
- B. Correct.
Jitter, or the variation in packet arrival times, causes inconsistent playback of audio and video streams. High jitter can lead to stuttering and poor synchronization, making it a key issue to address.
- C. Correct.
Latency refers to the delay in transmitting data from one point to another. High latency can result in noticeable delays in conversations, making real-time communication difficult.
- D. Incorrect.
Bandwidth utilization impacts overall network performance, but in this scenario, the symptoms described point more towards specific issues like loss, jitter, and latency, rather than insufficient bandwidth.
- E. Incorrect.
DNS lookup times are related to resolving domain names and are unlikely to cause the described issues in a video conferencing application, as these problems occur at the transport layer.