> In case of Webex, all sessions created in the US appear to be relayed via its infrastructure in US-east. This causes the sessions among users in US-west to be

> In case of Webex, all sessions created in the US appear to be relayed via its infrastructure in US-east. This causes the sessions among users in US-west to be subject to artificial detour, inflating their streaming lag. Former webexer here. That depends on many criteria, sessions can go through multiple locations depending on where the customer is located, the features being used, the type of customer, etc. Since Webex also does transcoding (useful when a 4k wall system and a cell phone are on a same meeting), that can influence where the traffic flows. Webex, Zoom and Google also all have their own backbones to reduce the number of hops over the public internet. In this case the researchers appear to be based in New Jersey so they would be more likely to enter the internal network via the eastern POPs.