CCNA: Cisco Certified Network Associate — Question 289

Which QoS tool is used to optimize voice traffic on a network that is primarily intended for data traffic?

Answer options

• A. WRED
• B. FIFO
• C. WFQ
• D. PQ

Correct answer: D

Explanation

PQ, or Priority Queuing, is specifically designed to give voice traffic higher priority over other types of data, ensuring it is transmitted without delay. In contrast, WRED, FIFO, and WFQ do not prioritize voice traffic as effectively, which can lead to latency and jitter that adversely affect voice quality.