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Glossary of terms used on this site

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C

Term Definition
cable modem

A modem for use with cable systems. Offers much higher data rates than conventional analogue modems.

Where a cable modem has LEDs on the front, these are typically one or more of: LED Short for Description PWR Power Power on indicator. USB USB Indicates activity on USB connection. ENET Ethernet Indicates activity on Ethernet connection. U/S Up Stream
D/S Down Stream
SYNC
RDY Ready Indicates that the modem is ready for normal use. Off indicates that it is performing its self test or that there is a fault.
CD
  1. Compact Disc. CDs typically contain audio (Audio-CD), video (Video-CD) or data (CD-ROM).

Audio CDs contain audio sampled at 16-bit, 44.1kHz and provides 74 or 80 minutes of two-channel (stereo) audio.

CD-ROMs can store up to 650MB of data.

  1. Change Directory. The cd command is a command-line command to change the current directory. It is available on a number of operating systems (including Windows and Unix/Linux.) The 'cd' command is normally expressed in lower case.

  2. Abbreviation for candela, the SI unit for the luminous intensity of light.
CD-R

CD-Recordable. A recordable (normally write once) compact disc (CD), cf CD-RW.
CD-RW

CD-Readable-Writable. A compact disc (CD) which can be recorded to and overwritten many times. cf CD-R.
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