Addressing the inherent limitations of HTTP protocol, Google researchers are proposing a new transfer protocol. SPDY uses a single SSL-encrypted session between a browser and a client, and then compresses all the request/response overhead. The requests, responses, and data are all put into frames that are multiplexed over the one connection. This makes it possible to send a higher-priority small file without waiting for the transfer of a large file that's already in progress to terminate. Compressing the requests is helpful in typical ADSL/cable setups, where uplink speed is limited. For good measure, unnecessary and duplicated headers in requests and responses are done away with. SPDY also includes real server push and a "server hint" feature.
Long established protocols like HTTP are resistant to change, but the ideas proposed are a good way forward in terms of making the web more secure and faster for everyone.
Source: Ars
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