CompTIA Network+ (N10-008) — Question 113

A voice engineer is troubleshooting a phone issue. When a call is placed, the caller hears echoes of the receiver's voice. Which of the following are the causes of this issue? (Choose two.)

Answer options

• A. Jitter
• B. Speed mismatch
• C. QoS misconfiguration
• D. Protocol mismatch
• E. CRC errors
• F. Encapsulation errors

Correct answer: A, C

Explanation

Jitter can cause packets to arrive at irregular intervals, leading to echoes during calls. QoS misconfiguration can affect the prioritization of voice traffic, contributing to latency and echo issues, while the other options do not typically result in echo problems in voice communications.