Which of the following is true about WebSockets in relation to Qlik Sense?

WebSockets are a protocol that enables interactive communication between a user's browser and a server. They provide a more efficient way of exchanging data in real time, which is particularly useful for applications like Qlik Sense that require frequent updates to the user interface and real-time data visualization.

In the context of Qlik Sense, it is crucial for proxies and routers to support WebSockets in order to facilitate seamless communication between clients and the Qlik Sense server. When a user interacts with a Qlik Sense app, if the infrastructure (i.e., proxies and routers) does not support WebSockets, the connection would likely revert to less efficient methods, leading to delays and degraded performance. Therefore, ensuring that WebSockets are supported by the network infrastructure is essential for optimal functioning of Qlik Sense applications.

Other options do not reflect the role of WebSockets accurately. For instance, it's not true that WebSockets are not supported at all, nor do they completely replace the standard HTTP protocol, as both can coexist. Additionally, while WebSockets are used during the interaction process that may include authentication, they are not limited to that purpose alone. Their primary advantage lies in enabling continuous data streams, which is broader than just authentication.