350-401 Question 63
Select 3A network administrator is tasked with configuring Quality of Service (QoS) on a Cisco router to prioritize voice traffic over other types of traffic. Which QoS components are involved in ensuring that voice traffic is prioritized effectively?
- A
Classification and Marking
- B
Congestion Management
- C
Traffic Policing
- D
Congestion Avoidance
- E
Shaping and Queuing
Show answer and explanation
Correct answers: A, B, E
Explanation
To effectively prioritize voice traffic, QoS components like Classification and Marking, Congestion Management, and Shaping and Queuing work together. Classification and Marking identify and tag voice traffic, ensuring it is recognized across the network. Congestion Management ensures prioritized queuing for voice traffic during congestion, and Shaping and Queuing help allocate bandwidth effectively to meet performance requirements. Traffic Policing and Congestion Avoidance are important for other QoS objectives but are not directly relevant to prioritizing voice traffic in this scenario.
- A. Correct.
Classification and Marking are essential for identifying and tagging voice traffic so it can be treated with higher priority throughout the network.
- B. Correct.
Congestion Management involves using mechanisms like priority queuing to ensure that critical traffic, such as voice, is transmitted before less important traffic.
- C. Incorrect.
Traffic Policing is used to enforce bandwidth limits but does not directly prioritize traffic, making it less relevant to this scenario.
- D. Incorrect.
Congestion Avoidance focuses on preventing buffer overflows through mechanisms like Weighted Random Early Detection (WRED), but it does not actively prioritize voice traffic.
- E. Correct.
Shaping and Queuing are used to smooth out traffic flows and allocate bandwidth to high-priority traffic, such as voice, ensuring timely delivery.