
224 Glossary
QTSS QuickTime Streaming Server. A technology that lets you deliver media over the
Internet in real time.
realm Definition TBD; general term with multiple applications. See WebDAV realm,
Kerberos realm.
relay In QuickTime Streaming Server, a relay receives an incoming stream and then
forwards that stream to one or more streaming servers. Relays can reduce Internet
bandwidth consumption and are useful for broadcasts with numerous viewers in
different locations. In Internet mail terms, a relay is a mail SMTP server that sends
incoming mail to another SMTP server, but not to its final destination.
relay point See open relay.
RTSP Real Time Streaming Protocol. An application-level protocol for controlling the
delivery of data with real-time properties. RTSP provides an extensible framework to
enable controlled, on-demand delivery of real-time data, such as audio and video.
Sources of data can include both live data feeds and stored clips.
RTP Real-Time Transport Protocol. An end-to-end network-transport protocol suitable
for applications transmitting real-time data (such as audio, video, or simulation data)
over multicast or unicast network services.
scope A group of services. A scope can be a logical grouping of computers, such as all
computers used by the production department, or a physical grouping, such as all
computers located on the first floor. You can define a scope as part or all of your
network.
SDP Session Description Protocol. A text file used with QuickTime Streaming Server
that provides information about the format, timing, and authorship of a live streaming
broadcast and gives the user’s computer instructions for tuning in.
search path See search policy.
search policy A list of directory domains searched by a Mac OS X computer when it
needs configuration information; also the order in which domains are searched.
Sometimes called a search path.
shadow image A file created by the NetBoot daemon process for each NetBooted
client where applications running on the client can write temporary data.
share point A folder, hard disk (or hard disk partition), or CD that’s accessible over the
network. A share point is the point of access at the top level of a group of shared items.
Share points can be shared using AFP, Windows SMB, NFS (an “export”), or FTP
protocols.
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