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300-820 · Question #178

When does the Webex App Endpoint send media to the Video Mesh cluster during a meeting?

The correct answer is C. when the round-trip delay to the Video Mesh cluster is shorter than the round-trip delay to the. The Webex App sends media to the Video Mesh cluster rather than the Webex cloud when the round-trip delay to the Video Mesh node is lower, ensuring the lowest-latency media path is selected.

Cisco Webex Core Components

Question

When does the Webex App Endpoint send media to the Video Mesh cluster during a meeting?

Options

  • Awhen the Webex cloud media services are offline
  • Bwhen there is insufficient bandwidth at the MPLS WAN edge.
  • Cwhen the round-trip delay to the Video Mesh cluster is shorter than the round-trip delay to the
  • Dwhen there is insufficient bandwidth at the internet edge

How the community answered

(51 responses)
  • A
    2% (1)
  • B
    2% (1)
  • C
    90% (46)
  • D
    6% (3)

Why each option

The Webex App sends media to the Video Mesh cluster rather than the Webex cloud when the round-trip delay to the Video Mesh node is lower, ensuring the lowest-latency media path is selected.

Awhen the Webex cloud media services are offline

Video Mesh is not a failover for cloud media outages; it is a performance optimization that operates in parallel with the cloud, not as a backup.

Bwhen there is insufficient bandwidth at the MPLS WAN edge.

MPLS WAN edge bandwidth is not a metric used by the Webex cascade selection algorithm to determine whether to send media to Video Mesh.

Cwhen the round-trip delay to the Video Mesh cluster is shorter than the round-trip delay to theCorrect

Webex Video Mesh uses a cascade selection algorithm that compares the round-trip time (RTT) from the endpoint to the on-premises Video Mesh cluster against the RTT to the Webex cloud media node. When the Video Mesh cluster has a shorter RTT, the endpoint sends media locally, reducing latency and conserving internet bandwidth.

Dwhen there is insufficient bandwidth at the internet edge

Internet edge bandwidth is not a direct input to the Video Mesh node selection decision; RTT delay, not bandwidth, is the determining factor.

Concept tested: Webex Video Mesh cascade selection based on round-trip delay

Source: https://help.webex.com/en-us/article/nqv0gd/Deploy-Webex-Video-Mesh

Topics

#Webex App#Video Mesh#Media Routing#Latency Optimization

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