350-801 · Question #68
Which issue can occur if QoS is not Deployed on a Cisco Collaboration architecture across the WAN?
The correct answer is D. Excessive jitter. Without Quality of Service (QoS) deployed on a WAN, real-time collaboration traffic like voice and video can suffer from excessive jitter, latency, and packet loss due to network congestion, leading to poor call quality.
Question
Which issue can occur if QoS is not Deployed on a Cisco Collaboration architecture across the WAN?
Options
- AUnexpected shut-down on Cisco Unified Communications Manager
- BPacket fragmentation
- C403 Forbidden errors on SIP calls
- DExcessive jitter
How the community answered
(43 responses)- A2% (1)
- B2% (1)
- C7% (3)
- D88% (38)
Why each option
Without Quality of Service (QoS) deployed on a WAN, real-time collaboration traffic like voice and video can suffer from excessive jitter, latency, and packet loss due to network congestion, leading to poor call quality.
An unexpected shutdown on Cisco Unified Communications Manager is typically caused by software defects, hardware failures, or resource exhaustion, not directly by a lack of QoS on the WAN.
Packet fragmentation can occur due to MTU mismatches but is not a direct consequence of lacking QoS; QoS primarily addresses prioritization and bandwidth management, not fragmentation prevention.
403 Forbidden errors on SIP calls are related to authorization or authentication issues, indicating a call is rejected due to policy, not a lack of QoS.
Excessive jitter is a common issue for real-time traffic, such as voice and video, when QoS is not implemented on a WAN. Without QoS, packets can experience variable delays as they contend for network resources, leading to an inconsistent arrival time at the destination and degraded audio/video quality.
Concept tested: QoS impact on real-time traffic
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/qos.html
Topics
Community Discussion
No community discussion yet for this question.