A Cisco IP phone is connected to a switch port that is configured with 'trust dscp'. The phone is set to mark media with DSCP EF. However, the network team notices that the DSCP is being changed to 0 at the switch. What is the likely cause?

The switch port is in untrusted mode.

The phone is not configured to mark DSCP.

The switch is configured to re-mark all traffic to DSCP 0.

The phone is using CoS marking instead of DSCP.

Which of the following is a unique QoS challenge in wireless networks that is not typically a concern in wired networks?

Interference from other devices

A network administrator is configuring QoS on a router. The requirement is to ensure that voice media is not dropped during congestion, but also to prevent voice from using more than 30% of the link. Which configuration would achieve this?

Use CBWFQ with a bandwidth guarantee of 30% for voice.

Use LLQ with a policer set to 30% of the link rate.

Apply a policer to the voice class that limits it to 30% of the link rate.

Use FIFO with a rate-limit of 30%.

During a VoIP call, users report choppy audio and dropped calls. The network team suspects congestion. Which QoS mechanism would directly help reduce jitter for media traffic?

Policing media traffic to limit its rate.

Applying priority queuing to the media class.

Increasing the buffer size for all queues.

Using Weighted Fair Queuing (WFQ) for all traffic.

CiscoCertified Network Professional Collaboration

Domain 6Objective 2

6.2 Describe the QoS Considerations for Signaling and Media over Wired and Wireless Networks 350-801 Practice Questions (Page 4)

Part of the Media and QoS domain, which accounts for 10% of the 350-801 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~5–8 in this domain), expect 1–2 from this objective — we provide 20 practice questions to prepare you well beyond it. (estimate)

20questions here

4free pages

5concepts

10%of the exam

Questions 16–20

16expert · hard
A Cisco IP phone is connected to a switch port that is configured with 'trust dscp'. The phone is set to mark media with DSCP EF. However, the network team notices that the DSCP is being changed to 0 at the switch. What is the likely cause?
Select an answer first
17foundation · easy
Which of the following is a unique QoS challenge in wireless networks that is not typically a concern in wired networks?
Select an answer first
18foundation · easy
Which network condition has the most direct impact on the perceived quality of a real-time audio stream, causing choppy or garbled sound?
Select an answer first
19expert · hard
A network administrator is configuring QoS on a router. The requirement is to ensure that voice media is not dropped during congestion, but also to prevent voice from using more than 30% of the link. Which configuration would achieve this?
Select an answer first
20application · medium
During a VoIP call, users report choppy audio and dropped calls. The network team suspects congestion. Which QoS mechanism would directly help reduce jitter for media traffic?
Select an answer first

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