300-445 Question 117
Select 3An enterprise network team is troubleshooting complaints from users about poor voice call quality in a VoIP application. Upon investigation, they notice the following network characteristics: high packet loss, significant jitter, and elevated latency. Which combination of these factors is most likely to negatively impact the VoIP application performance?
- A
High packet loss
- B
Significant jitter
- C
Elevated latency
- D
Low bandwidth availability
- E
High throughput
Show answer and explanation
Correct answers: A, B, C
Explanation
VoIP applications are highly sensitive to network characteristics such as packet loss, jitter, and latency. High packet loss can cause missing audio packets, jitter can create uneven call quality, and elevated latency can lead to delays in conversation. These three factors combined are most likely to degrade the performance of VoIP applications in the given scenario. While bandwidth and throughput are important, they are not the primary issues identified in this case.
- A. Correct.
High packet loss can cause voice packets to be dropped, resulting in audible gaps or distorted sound in VoIP calls, directly affecting call quality.
- B. Correct.
Significant jitter causes variations in packet arrival times, leading to uneven audio quality or delays in VoIP communication.
- C. Correct.
Elevated latency results in delays in voice data transmission, causing noticeable lags in conversations, which is highly detrimental to real-time communication like VoIP.
- D. Incorrect.
Low bandwidth availability could cause issues, but it is not directly mentioned as a problem in this scenario. The focus here is on packet loss, jitter, and latency.
- E. Incorrect.
High throughput is generally a positive characteristic for network performance and does not negatively affect VoIP call quality unless it is accompanied by other issues like congestion.