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Unit 1 - Data Exchange
Understand Data Exchange
19
Computer Science
12th Grade
09/04/2013

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Term
Data Exchange
Definition
passing data between computers,network or internet.
Term
Simplex
Definition
Data Transfer ONE direction ONLY
Term
Half - Duplex
Definition
Data Transfer - BOTH directions ONE at a time
Term
Full Duplex
Definition
Data Transfer - BOTH directions as the SAME time
Term
VoIP
Definition
Voice over Internet Protocol - Voice on a data network e.g. SKYPE
Term
Web/Video Conferencing
Definition
2 way video communication over a fast internet connection in REAL time
Term
CODEC
Definition
Coder-Decoder. Video and Audio compression, to speed up transfer of data on VoIP/Video Conference
Term
Fibre Optic
Definition
Fast/Large Bandwidth/Laser or LED transmission/Long Distances/Expensive/Secure
Term
Wireless
Definition
Wifi / Infrared / microwave / satellite / BlueTooth
Term
Wifi
Definition
Wireless inside a building - 802.11a,b,g,n - fast about 50m distance
Term
InfraRed
Definition
Wireless - Short Distance / slow / line of sight
Term
Microwave
Definition
Wireless - Fast over a few KM distance - surface of the earth
Term
Satellite
Definition
Wireless - Large Distances - Slow - used in remote locations
Term
Wired Connection
Definition
UTP (Unshielded Twisted Pair, Co-Axil,)
Term
Parallel
Definition
8 BITS at one time
Term
Serial
Definition
1 bit at a time
Term
Bi-Directional
Definition
transmit in Both directions
Term
Packet Switching
Definition
Transmission over the internet - packets spli and delivered individually
Term
BandWidth
Definition
The maximum transmission speed. BITS PER SECOND bps
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