Preface : Terminology

Terminology
This section provides definitions for Juniper Networks and industry-standard terms that may be unfamiliar to the reader.
AFR
Assured Flow Rate. An Media Flow Controller option that, when enabled, ensures that media content is delivered at a rate that is minimally needed for the video to play smoothly.
Bit-rate
A data rate (the amount of data transferred in one direction over a link divided by the time taken to transfer it) expressed in bits per second. Juniper Networks notation examples: Kbps (kilobits per second), KB/s (kilobytes per second).
Edge cache
An appliance placed between the Internet and the Web server which caches content (like Java Script, CSS, images, etc.) and delivers them for the Web server, freeing up that server for other processes. Media Flow Controller as an edge cache is effectively a “reverse proxy,” that provides these benefits: reduces the load (network and CPU) on an origin server by servicing previously retrieved content and enhances the user experience due to a decrease in latency.
Full Download
A media delivery mode in which the entire media file is downloaded before playback begins; contrast with Progressive Download (see PDL, Progressive DownLoad).
KB and KiB
KB=1000 Kilo Bytes (networking), KiB=1024 Kilo Bytes (storage).
MB and MiB
MB=1,000,000 Mega Bytes (networking), MiB=1,005,376 (1024 x 1024) Mega Bytes (storage).
Media Flow Manager:
A management interface that allows you to push configurations to a number of Media Flow Controllers from a central interface.
Origin Library
The source of media content.
Origin Server
The media content server.
Player (media player software)
Any media player for playing back digital video data from files of appropriate formats such as MPEG, AVI, RealVideo, Flash, QuickTime, and so forth. In addition to VCR-like functions such as playing, pausing, stopping, rewinding, and forwarding, some common functions include zooming/full screen, audio channel selection, subtitle selection, and frame capturing.
Profile
A media “bit-rate profile” is the bit-rate encoding that allows optimal downloads to different bandwidths.
PDL, Progressive DownLoad
A media delivery mode in which the media file is played while it is being downloaded; contrast with Full Download (see Full Download).
Pull vs. Push
Pull refers to media fetches from the origin server initiated by Media Flow Controller based on received requests. Push refers to scheduled media deliveries from the origin server to Media Flow Controller.
UOL, URI, URL
These terms stand for Uniform Object Locator, Uniform Resource Identifier, Uniform Resource Locator (respectively).
uri-prefix
This namespace argument refines what requests Media Flow Controller accepts. In the URL shown below, the uri-prefix could be defined as / (slash), /vod, or /vod/path1. If / (slash) is used, all incoming requests to that domain are honored; if /vod, only requests containing “/vod” are honored; if /vod/path1 requests must include that prefix and that path to be honored.
 
Virtual Player
This is a Media Flow Controller term referring to the sever-side player provided by Media Flow Controller to assist in media viewing. Media Flow Controller offers several types of virtual player for use in different scenarios; for SmoothFlow, the Type smoothflow virtual player is used exclusively.

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Media Flow Manager Administrator's Guide and CLI Command Reference
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