This means that it helps in maintaining a persistent connection. This version of HTTP eliminates the need for opening a TCP connection for each HTTP request. Being a one-way synchronous communication protocol, this may result in a lot of overheads while creating and destroying a TCP connection every time a message is sent in real-time chat applications. But this requires establishing a TCP connection every time data is sent to the server. The concept of HTTP request-response is widely used. The user might refresh the web page time-to-time to check for message updates. With the traditional request-response model, we have few options: The challenge arises in selecting and implementing a suitable development technique.
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