Learn how to resolve VoIP audio lag issues caused by saturated network buffers without upgrading hardware. Configuring Quality of Service (QoS) rules prioritizes voice traffic to eliminate latency and dropped packets. Expert tips from a CompTIA CV0-003 certification expert.
Table of Contents
Question
A systems administrator is troubleshooting issues with audio lag during phone conferences. When looking at the core switch, the administrator notices its buffers are consistently full, and packets are being dropped due to the large number being sent and received. There is no room in the budget for new hardware, but it is critical that the audio lag be fixed immediately. Which of the following will most likely resolve the issue?
A. Enable compression of audio traffic.
B. Configure QoS rules for VoIP traffic.
C. Verify that the gateway uplink is not saturated
D. Add an exception to IPS for voice traffic.
Answer
The best solution to resolve the audio lag issue during phone conferences without purchasing new hardware is B. Configure QoS rules for VoIP traffic.
Explanation
Quality of Service (QoS) is a network feature that allows certain types of traffic, such as VoIP, to be prioritized over other less time-sensitive traffic. When QoS rules are configured on network devices like switches and routers, the high-priority VoIP packets are processed and forwarded first before other traffic in the queue. This ensures that there is always available bandwidth for the voice data, minimizing latency and preventing packets from being dropped even when the network is congested.
Enabling compression (A) could help reduce bandwidth usage but would add overhead and latency when encoding/decoding the audio. Verifying the gateway uplink (C) is a good troubleshooting step but doesn’t directly address the issue of oversaturated switch buffers. Adding an IPS exception for voice traffic (D) prevents those packets from being deeply inspected but doesn’t give them priority treatment.
Therefore, configuring QoS to expedite the handling of VoIP packets through the saturated core switch is the most effective solution to eliminate the audio lag without requiring a hardware upgrade. The QoS settings reserve bandwidth for voice traffic and move it to the front of the processing queue to prevent latency and dropped packets.
CompTIA CV0-003 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the CompTIA CV0-003 exam and earn CompTIA CV0-003 certification.