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Feature released: Server Load Balancer supports the WSS protocol in all regions. A variety of web applications mushroom with the boom of the Internet. As a result, many applications begin to require that the server end have the real-time push capability (such as live streaming chat rooms). In the past, many websites used the polling technology for push. In the polling mode, the browser sends an HTTP request to the server at set intervals (such as one second), and the server returns the latest data to the browser on the client. But this traditional mode has an obvious flaw: The browser needs to send requests again and again, and an HTTP request may contain a long header followed by just a small size of valid data, which would waste a lot of bandwidth and other resources. To address this issue, HTML5 defines the WebSocket protocol to save server resources and bandwidth while enabling more real-time communications. WebSocket provides the full-duplex communication between the browser and the server, allowing the server to send data to the client. Target customers: all public cloud users.