Juniper MEDIA FLOW CONTROLLER 2.0.4 - ADMINISTRATOR S GUIDE AND CLI Administrator's Manual page 32

Preface Media Flow Controller Administrator's Guide
NFS (network file system) A protocol that allows a user on a client computer to access files
over a network similarly to how local storage is accessed.
NIC Network Interface Controller/Card.
NTP Network Time Protocol.
Origin library The source of media content, typically a server located at a data center.
Origin server The media content server. Juniper Networks Media Flow Controller can be
configured as an Origin 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.
Pre-stage Data placed on a Media Flow Controller or origin server before an HTTP request
comes in for it. Contrast with Ingest.
Profile (Bit-rate profile) A media "bit-rate profile" is the bit-rate encoding that allows optimal
downloads to different bandwidths.
Progressive Download (PDL) An HTTP media delivery mode in which the media file is
played while it is being downloaded; contrast with Full Download.
Proxy (reverse, mid-tier, transparent, virtual) A reverse proxy is a server processing in-
bound traffic, installed in front of origin servers. Reverse proxies are used for scaling origin
servers, caching (serving commonly-accessed files), load balancing, and security (denying
requests, preventing direct origin server access, and so forth.). A mid-tier proxy sits between
the origin servers and the edge, and serves requests from the edge caches. Mid-tier proxies
improve response time for requests because content is closer to the user; and off-load origin
servers from repeat requests from the edge. A transparent proxy is a proxy that does not
modify the request or response beyond what is required for proxy authentication and
identification. Transparent proxies help optimize networks transparently (no client
configuration required, no modification of traffic done). A virtual proxy uses the HOST header
of the incoming request to derive origin; use this variant of a reverse proxy as an alternate to
providing a single origin-server. Media Flow Controller can be used in any of these capacities.
Publishing Point (live-pub-point) A way to distribute content to your users (live or
broadcast as live); either through a defined SDP (service delivery protocol) file, or a
namespace.
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.
PXE (Preboot eXecution Environment) boot A way to boot computers using a network
interface without needing a CDROM or USB drive; PXE must be properly installed first.
Remote Authentication Dial In User Service. A networking protocol that provides centralized
access, authorization and accounting management for people or computers to connect and
use a network service.
Regex An extended regular expression. Enclose all regex entries in single quotes; for
example, a regex for www.example.com plus example.com could be this:
'^.*\example\.com'.
32 Terminology Copyright © 2010, Juniper Networks, Inc.