Which description of medianet is true?

Medianet is an architecture, not merely a set of protocols - protocols are one component within it rather than its defining characteristic.

Medianet is a network-wide architectural framework, not a specific product family of switches and routers.

Medianet is defined as an end-to-end architecture in which the network works together with endpoints and applications to scale, optimize, and enhance media delivery. It is not a protocol set or hardware family but a holistic framework spanning the entire media path from source to destination.

Medianet addresses all media types end-to-end including voice and video, and is not limited to enhancing video streaming quality alone.

Medianet is a software and architecture framework that spans the entire network, and is not a proprietary feature built solely on hardware DSP resources.