Apple QuickTime Informações Técnicas descarregar pdf (Página 72)

72 Glossary

broadcast user A user who has permission to broadcast to the streaming server. The

broadcast user name and password are set in the General Settings pane of Streaming

Server Admin and are used in conjunction with announced broadcasts. It isn’t

necessary to create a broadcast user for UDP broadcasts.

browser plug-in Software that you attach to a browser to enable it to display specific

data formats.

byte A basic unit of measure for data, equal to eight bits (or binary digits).

client A computer (or a user of the computer) that requests data or services from

another computer, or server.

codec Any technology for compressing and decompressing data. Codecs can be

implemented in software, hardware, or a combination of both.

data rate The amount of information transmitted per second.

DNS Domain Name System. A distributed database that maps IP addresses to domain

names. A DNS server, also known as a name server, keeps a list of names and the IP

addresses associated with each name.

DSL Digital subscriber line. A broadband data transmission technology that operates

over telephone lines.

DV Digital video. A digital tape-recording format using approximately 5:1 compression

to produce Betacam quality on a very small cassette.

firewall Software that protects the network applications running on your server. IP

firewall service, which is part of Mac OS X Server software, scans incoming IP packets

and rejects or accepts these packets based on a set of filters you create.

FireWire A hardware technology for exchanging data with peripheral devices, defined

by IEEE Standard 1394.

frame In QuickTime streaming, a single image in a movie or sequence of images.

frame rate In a movie, the number of frames per second.

FTP File Transfer Protocol. A protocol that allows computers to transfer files over a

network. FTP clients using any operating system that supports FTP can connect to a file

server and download files, depending on their access privileges. Most Internet browsers

and a number of freeware applications can be used to access an FTP server.

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Apple QuickTime Informações Técnicas Página 72