Apple QuickTime Technical Information download pdf (Page 71)

Glossary

access file A text file called qtaccess that contains information about users and groups

who are authorized to view media in the directory in which the access file is stored.

administrator A user with server or directory domain administration privileges.

Administrators are always members of the predefined “admin” group.

administrator computer A Mac OS X computer onto which you’ve installed the server

administration applications from the Mac OS X Server Admin CD.

announced broadcast A method such as Automatic Unicast (Announce) that enables

a broadcaster to negotiate with a server to accept a broadcast.

AppleScript A scripting language with English-like syntax, used to write script files that

can control your computer. AppleScript is part of the Mac operating system and is

included on every Macintosh.

Automatic Unicast (Announce) A method of delivering a broadcast to a streaming

server in which an SDP file is automatically copied and kept current on the server. A

broadcast user name and password must be created before starting such a broadcast.

AVI Audio Visual Interleave. A Windows video file format.

bandwidth The capacity of a network connection, measured in bits or bytes per

second, for carrying data.

bit A single piece of information, with a value of either 0 or 1.

bit rate The speed at which bits are transmitted over a network, usually expressed in

bits per second.

broadcast In a general networking context, the transmission of a message or data that

any client on the network can read. Broadcast can be contrasted with unicast (sending

a message to a specific computer) and multicast (sending a message to a select subset

of computers). In QuickTime Streaming Server, the process of transmitting one copy of

a stream over the whole network.

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Apple QuickTime Technical Information Page 71