I would like to know which network protocols are used for media streaming by online music and video sites ?
closed as too broad by Mike Pennington, Teun Vink♦, YLearn♦ May 29 '15 at 20:50
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If by music and video sites, you mean web servers you can access with a web browser, then the protocol in use is the one you see at the beginning of the URL within your web browser, ex.:
. It is plain HTTP (i.e. 80/tcp) or HTTPS (i.e. 443/tcp).
There are many network protocols at play. Some at the network layer (IP), some at the transport layer (TCP / UDP). Then there are formats or codecs for the media such as mp3 and mp4 and webm.