A small company recently added VoIP through its ISP.

Comprehensive and Detailed Explanation

CompTIA A+ VoIP and network performance topics stress the importance of Quality of Service (QoS) and traffic separation.

Creating a separate VLAN for VoIP:

Reduces congestion

Prioritizes voice traffic

Prevents voice packets from competing with data traffic

Improves latency, jitter, and packet loss issues during peak hours

This directly fixes intermittent VoIP quality issues.

Why the other options are incorrect

B. Route calls through a gigabit port – Internal port speed is not the bottleneck; congestion is.

C. Shielded cable – Does not solve bandwidth or QoS issues.

D. Increase bit rate – Makes the problem worse, requiring more bandwidth.