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HTTP is an acronym for Hyper-Text Transfer Protocol. It is the standard method by which your web browser communicates with web servers via the internet. HTTP is encapsulated in TCP packets, guaranteeing delivery. In a multimedia technology context, HTTP is often used as a lowest common denominator for delivering multimedia content. HTTP packets are invariably allowed to pass through firewalls and connections operate from client -> server using TCP. More advanced, multimedia-specific networking protocols operate using UDP and make other requirements regarding firewalls which make their operation more complicated, but flexible by contrast.

See also