Juniper MEDIA FLOW CONTROLLER 2.0.4 - ADMINISTRATOR S GUIDE AND CLI Administrator's Manual page 31

Media Flow Controller Administrator's Guide Preface
Broadcast A type of network routing scheme where data is sent to all possible destinations on
a network. Contrast with Multicast and Unicast.
CDN Content Delivery Network. A system of computers networked together across the
Internet that cooperate transparently to deliver content most often for the purpose of improving
performance, scalability, and cost efficiency, to end users.
CHD Computed Historical Datapoints; traffic samples that have been computed in some
manner, such as summation and averaging.
CLI Command Line Interface.
Client Node or software program (front-end device) that requests services from a server.
CMC Central Management Console, Juniper Networks management interface that allows you
to push configurations to a number of Media Flow Controllers from a central interface. In
Release 2.0.4, only client configuration is supported.
DHCP Dynamic Host Configuration Protocol.
DSR Direct Server Return. A method of handling TCP traffic in the context of utilizing a proxy.
Edge cache An appliance, placed between the Internet and close to the end user, that caches
and delivers content (like Java Script, CSS, images, and so forth.) freeing up Web servers 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.
FMS Flash Media Server.
Full Download An HTTP media delivery mode in which the entire media file is downloaded
before playback; contrast with Progressive Download (PDL).
HDD Hard Disk Drives.
"Hot" Content (Short Tail vs. Long Tail) When content is often requested it becomes "hot."
Media Flow Controller caches content hierarchically based on hotness. Short tail videos are
those that are often requested: a few videos requested by many different clients. Long tail
videos are those that are seldom requested: many different videos requested by few clients.
Ingest Data placed on a Media Flow Controller, analyzed, and queued; contrast with Pre-
stage.
KB and KiB KB=1000 Kilo Bytes (networking), KiB=1024 Kilo Bytes (storage).
Local boot This refers to booting from the default boot partition on the system; for example,
when the reboot command is given.
MB, MiB, and Mbit MB=1,000,000 Mega Bytes (networking). MiB=1,048,576 (1024 x 1024)
Mega Bytes (storage). Mbit=1,000,000 x 8 Megabits (data transfer).
MTU Maximum transmission unit. The size (in bytes) of the largest packet or frame that a
given layer of a communications protocol can pass onwards.
Multicast A type of network routing scheme where data is sent to certain destinations based
on address. Contrast with Broadcast, and Unicast.
Namespace A defined collection of delivery policies for different categories of content or
domains.
Network prefix An IPv4 network prefix specifying a network. Used in conjunction with a
netmask to determine which bits are significant. For example, "192.168.0.0".
Terminology 31