2.1 Transport

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The Windows Media HTTP Streaming Protocol uses HTTP 1.0, as specified in [RFC1945], or HTTP 1.1, as specified in [RFC2616], as the transport layer.

A TCP port has not been reserved for this protocol. TCP port 80 is commonly used because many HTTP proxy servers only forward HTTP traffic that uses port 80.

The protocol uses the access authentication functionality of the HTTP layer. The supported HTTP access authentication schemes are implementation-specific.<1> Clients SHOULD use the X-Accept-Authentication (section 2.2.1.9) header to specify the preferred list of authentication schemes. For more information about HTTP access authentication, see HTTP 1.0, as specified in [RFC1945], section 11.