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When the connection is first established it will use default settings. HTTP2 is addressing all these issues, by providing the receive window (rwnd), which communicates the size of transferring data between sender and receiver. Flow Control: Flow control is the mechanism to prevent the sender from overwhelming with data to a receiver, it may not able to process the data because of many reasons like a receiver is busy, it is under heavy load, or it may not have allocated sufficient buffer space t process the data.

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Huffman coding provides the specific values to be compressed when transferred, and the indexed list of before transferred values enables us to encode duplicate values by transferring index values that can be used to efficiently look up and rebuild the full header keys and values.ĥ.

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It also requires both server and client to maintain and update the indexed list of previously sent header fields which is then used as a reference to efficiently encode previously transmitted values. It allows the transmitted header fields to be encoded via a static Huffman code, which reduces their individual transfer size.HTTP2 provides a better solution for this overhead transfer of the data by using HPACK compression format using below technique. In HTTP1.1 all header values will have sent in a plain-text format which will take 500-800 bytes per each request, the size will increase if HTTP cookies are being used. Header Compression: Each HTTP transfer carries a set of headers that will describe the transferred resources and its properties. To hasten the load time of the page, all new browsers prioritize requests based on type of asset, their location on the page, and even learned priority from previous visit exp, if the rendering was blocked on a certain asset in a previous visit, then the same asset may be prioritized raised in the future.ģ. The server will use the information to prioritize the stream processing and controlling the system resources like CPU, memory and other resources, once the response is available then it will allocate the bandwidth to ensure the delivery of the high priority responses to the client. The combination of both dependencies and weights will allow a client to construct a prioritization tree that expresses how the client wants to receive the preferences.

Each stream may provide explicit dependency on other streams.

Each stream may assign an integer weight between 1-256.

For providing the prioritization HTTP2 standards has a feature to provide associated weight and dependency (if the stream is depending on another stream).

Stream Prioritization: The client can indicate which if the resources are more important than others to a server.