Editing Microsoft Media Server (section)

{{short description|Network-streaming protocol by Microsoft}}
'''Microsoft Media Server''' ('''MMS'''), a Microsoft [[proprietary protocol|proprietary]] network-streaming protocol, serves to transfer [[unicast]] data in [[Windows Media Services]] (previously called '''NetShow Services'''). MMS can be transported via [[User Datagram Protocol|UDP]] or [[Transmission Control Protocol|TCP]]. The MMS default [[TCP and UDP port|port]] is [[List of TCP and UDP port numbers|UDP/TCP 1755]].<ref>{{cite web|url=https://msdn.microsoft.com/en-us/library/cc875824.aspx|title=Network Ports Used by Key Microsoft Server Products|accessdate=2017-09-29|author=Microsoft|date=5 November 2014 }}</ref>

Microsoft deprecated MMS in favor of [[Real Time Streaming Protocol|RTSP]] (TCP/UDP port 554) in 2003 with the release of the Windows Media Services 9 Series, but continued to support the MMS for some time in the interest of [[backward compatibility]]. Support for the protocol was finally dropped in [[Windows Media Services]] 2008.<ref name=autogenerated1>[http://www.microsoft.com/windows/windowsmedia/licensing/netprokit.aspx#TechnicalSpecificationDelivery Microsoft's Windows Media Networking Protocols Porting Kit]</ref>

{{As of | 2012}} Microsoft still recommends<ref name=autogenerated1 /> using "mms://" as a "protocol rollover<ref>[http://msdn2.microsoft.com/en-gb/library/aa390673.aspx Microsoft's Windows Media Format 11 SDK Protocol Rollover]</ref> [[Uniform Resource Locator|URL]]". As part of protocol rollover a [[Windows Media Player]] version 9, 10, or 11 client opening an "mms://" URL will attempt to connect first with RTSP over UDP and if that fails it will attempt RTSP over TCP. After an RTSP attempt fails, Windows Media Player versions 9 and 10 will attempt MMS over UDP, then MMS over TCP.<ref>{{cite web|url=http://msdn.microsoft.com/en-us/library/aa390673(VS.85).aspx|title=Protocol Rollover|website=[[Microsoft Developer Network]]|date=12 June 2009 |publisher=[[Microsoft]]}}</ref> If using Windows Media Player 11 and an [[RTSP]] attempt fails, or if using a previous version of Windows Media Player and MMS fails, a modified version of a [[HyperText Transfer Protocol|HTTP]] over TCP connection will be attempted. This modified version is referred to by some third parties as MMSH,{{Citation needed|date=December 2016}} and by Microsoft as MS-WMSP (Windows Media HTTP Streaming Protocol).<ref>[http://msdn.microsoft.com/en-us/library/cc251059.aspx Windows Media HTTP Streaming Protocol Specification]</ref> The [[Uniform resource identifier|uniform resource identifier (URI)]] scheme <code>mms</code> has also been proposed to be used for the unrelated [[Multimedia Messaging Service]] (MMS) protocol.<ref>[http://tools.ietf.org/html/draft-wugofski-mms-uri-scheme draft-wugofski-mms-uri-scheme-00 - MMS URI Schemes]. Tools.ietf.org. Retrieved on 2014-02-22.</ref>

For several years developers of the [[SDP Multimedia]] download-tool [[Reverse engineering|reverse engineered]] the MMS protocol and published unofficial documentation for it. However, Microsoft finally released the protocol specification in February 2008.<ref>[http://sdp.ppona.com/news2008.html SDP multimedia news update 2008]. Sdp.ppona.com (2008-02-08). Retrieved on 2014-02-22.</ref>