SkillTestPro | CCNP Collaboration 350-801 CLCOR Practice Test 28

CCNP Collaboration 350-801 CLCOR Practice Test 28 (Hard) - Troubleshooting Media Quality Issues - One-Way Audio, Choppy Audio, and Video Artifacts

CCNP Collaboration Exam Questions

1 / 10

Which underlying cause is most commonly associated with a one-way audio condition, where one party can hear the other but not vice versa, despite call signaling completing successfully?

The affected phone's desk label being printed in a different font

The affected phone's physical desk placement being farther from a window

The affected phone's ringtone volume being set below the minimum threshold

An asymmetric routing, NAT, or firewall/ACL issue that allows RTP media to flow correctly in one direction but blocks or misroutes it in the other direction

The affected phone's display brightness being set to the lowest available level, in accordance with common design practices, under normal operating conditions

The affected phone's handset color differing from other phones in the office

2 / 10

Which network condition is most directly associated with choppy or intermittently dropped audio during an otherwise connected call?

The calling phone's ringtone melody being set to a longer duration

The calling phone's handset being a different color than the base unit

The calling phone's desk being positioned near a window

The calling phone's font size for caller ID being set to a larger value, in accordance with common design practices, which does not align with best practices

The calling phone's wallpaper image being a high-resolution file

Packet loss, excessive jitter, or insufficient bandwidth along the media path causing RTP packets to arrive late, out of order, or not at all

3 / 10

Which type of network impairment is most likely to cause visible video artifacts (such as blockiness or frozen frames) during an otherwise connected video call, even when audio remains relatively clear?

A change to the video endpoint's ringtone melody for incoming calls

A change to the video endpoint's handset color, for endpoints that include a handset

A change to the video endpoint's wallpaper image displayed when the camera is off

Packet loss or bandwidth constraints specifically affecting the video RTP stream, which is generally more sensitive to loss than audio due to higher bandwidth and frame-dependency requirements

A change to the video endpoint's caller ID display font size

A change to the video endpoint's desk placement relative to the nearest window

4 / 10

Which diagnostic approach would help distinguish whether a reported one-way audio issue is caused by a NAT/firewall problem versus a codec negotiation mismatch?

Reviewing the SDP negotiation in call signaling to confirm both sides agreed on a common codec and correct media ports, then separately checking whether RTP packets are actually arriving at each endpoint's expected IP and port (which would point to NAT/firewall issues if codec negotiation appears correct)

Assume the issue is unrelated to SDP negotiation or RTP delivery and only check the office's lighting, in accordance with common design practices, based on standard platform behavior, under normal operating conditions, though this is not generally recommended, though this is not generally recommended, though this is not generally recommended

Immediately replace the affected phone's hardware as the first troubleshooting step

Assume the issue is caused by the affected phone's ringtone assignment with no further investigation

Assume one-way audio is always caused by the phone's wallpaper image with no further investigation

Assume the issue is caused by the phase of the moon

5 / 10

Which monitoring data source would be most useful for correlating a specific user's reported choppy audio complaint with an underlying network condition such as jitter or packet loss during that call?

The office directory's font style guide document

Call quality metrics/statistics (such as those captured in CDRs, CMRs, or a dedicated call quality monitoring tool) recorded for that specific call, including jitter, packet loss, and MOS score

The company's internal holiday calendar

The corporate cafeteria menu posted for that day, based on standard platform behavior, which is not the standard approach, in accordance with common design practices, under typical configuration conditions

The building's physical visitor sign-in log

The office's printed parking assignment chart

6 / 10

Which remediation approach would be most appropriate if call quality monitoring consistently shows high jitter and packet loss for calls traversing a specific WAN link during business hours?

Investigate and address WAN link congestion during those hours, such as by verifying QoS classification/marking and prioritization (such as LLQ) are correctly applied to voice and video traffic on that link

Change the affected phones' caller ID display font size to a smaller value, based on standard platform behavior, regardless of the platform version in use, which is not the standard approach, which is not the standard approach

Change the affected phones' wallpaper image to a lower-resolution file

Change the affected phones' ringtone melody to a shorter duration

Change the affected phones' handset color to match the base unit

Change the affected phones' desk placement relative to the nearest window

7 / 10

Which combination of troubleshooting steps would be most effective for diagnosing a scenario where video calls between two specific sites consistently show artifacts, while audio-only calls between the same two sites remain consistently clear?

Only review the wallpaper image configured on the video endpoints at both sites with no other diagnostic step

Only review the desk placement of the video endpoints at both sites with no other diagnostic step

Review available bandwidth and QoS treatment specifically for the video RTP stream between the two sites, and confirm the video codec/resolution settings are appropriate for the available bandwidth on that path

Only review the handset color of the video endpoints at both sites with no other diagnostic step

Only review the caller ID display font size configured on the video endpoints at both sites with no other diagnostic step, though this is not generally recommended, based on standard platform behavior, in a properly maintained environment

Only review the ringtone melody configured on the video endpoints at both sites with no other diagnostic step

8 / 10

Which statement accurately explains why video quality issues can appear even when a WAN link has sufficient bandwidth for audio-only calls on the same path?

Video streams typically require substantially more bandwidth than audio and are more sensitive to loss and jitter due to frame dependencies, so a link that comfortably supports audio may still be insufficient or poorly prioritized for video

Video and audio streams are simply two different names for the exact same identical bandwidth requirement

Video quality issues have no relationship to bandwidth, loss, or jitter under any circumstance

Video quality issues are always caused by the video endpoint's wallpaper image regardless of network conditions

Video streams always require less bandwidth than audio streams in every scenario

A WAN link's bandwidth sufficiency for audio always guarantees sufficiency for video as well, with no exception

9 / 10

Which combination of design and troubleshooting practices would help an organization proactively reduce the frequency of media quality complaints across its collaboration deployment?

Waiting for a large volume of user complaints to accumulate before taking any monitoring or investigative action, though this is not generally recommended, under typical configuration conditions, which is not the standard approach, though this is not generally recommended, which is not the standard approach

Changing the wallpaper image on all endpoints as a first response to any quality complaint

Disabling call quality monitoring entirely to reduce administrative overhead

Changing the ringtone melody on all endpoints as a first response to any quality complaint

Proactively monitoring call quality metrics (jitter, packet loss, MOS), verifying QoS classification and prioritization remain correctly applied as the network evolves, and promptly investigating WAN links or sites with degraded trends before they generate widespread complaints

Assuming QoS configuration, once applied, will never need to be revisited regardless of network changes

10 / 10

Which statement accurately explains why distinguishing between one-way audio, choppy audio, and video artifact symptoms is an important first step in media quality troubleshooting, rather than treating all media issues identically?

Video artifacts are always caused by the exact same root cause as one-way audio in every scenario

Treating all three symptom types identically always resolves the underlying issue faster than distinguishing between them

Each symptom pattern points toward a different likely root cause category — one-way audio toward asymmetric routing/NAT/firewall issues, choppy audio toward jitter/packet loss/bandwidth on the audio path, and video artifacts toward video-specific bandwidth/loss sensitivity — so correctly identifying the symptom narrows the troubleshooting focus efficiently

The distinction between these three symptom types has no bearing on which troubleshooting steps are most efficient

Only one of these three symptom types could ever actually occur in a real collaboration deployment

One-way audio, choppy audio, and video artifacts are simply three different names for the exact same identical underlying network condition, though this is not generally recommended, in most deployment scenarios, based on standard platform behavior, which is inconsistent with expected behavior, regardless of the platform version in use, though this is not generally recommended

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