How does Webex Calling ensure call quality?

Webex Calling ensures call quality primarily through the implementation of Quality of Service (QoS) measures. QoS is a set of technologies and techniques used to manage network resources and prioritize certain types of traffic, such as voice calls, to ensure that they maintain a high level of quality even when there is congestion on the network.

In the context of Webex Calling, QoS helps to guarantee that voice packets are transmitted with minimal delay, jitter, and packet loss, which are critical for maintaining clear and uninterrupted communication during calls. This is particularly important since voice traffic is sensitive to such parameters. By prioritizing voice data over less time-sensitive traffic, Webex can provide a stable and reliable calling experience for users.

The other choices do not directly contribute to achieving the same standard of call quality. Limiting user numbers could have a temporary effect on reducing congestion, but it doesn't inherently improve call quality. Random call routing may help distribute the load, but it doesn't guarantee that calls will maintain a high quality. Similarly, restricting internet speeds could lead to poorer call quality rather than enhance it, as it may result in delays and dropped calls due to insufficient bandwidth. Therefore, QoS measures stand out as the primary mechanism by which Webex Calling ensures a consistent and