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IB CS SL Topic 3
Some terms for IB Computer Science Standard Level Topic 3
21
Computer Science
11th Grade
01/07/2018

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Term
bus topology
Definition
Computer network in which a "bus" connects all the devices together through a common cable.
Term
cable
Definition
Allows for the connection of computers over a network; made from copper wire and fiber
Term
check digit
Definition
Extra digit added to numerical data that is used to check data integrity after input, transmission, storage, and processing
Term
data integrity
Definition
The accuracy of data after input, transmission, storage, or processing
Term
check sum
Definition
Error-detecting procedure that generates a sum from the digits of a number
Term
data packet
Definition
Portion of a message that is transmitted through a network; contains data such as check digits and destination address
Term
gateway
Definition
Link that resides between computer networks and is responsible for converting data passing through into the appropriate format so it can be understood by the receiving network.
Term
handshaking
Definition
Exchange of predetermined signals to signify that a connection has been established between two ssytems
Term
hub
Definition
Network connection point for devices; data arriving at a hub is copied and sent to all devices on the network
Term
ISDN (integrated services digital network)
Definition
International communications standard that allows for the transmission of audio/video and other data over digital telephone lines
Term
local area network (LAN)
Definition
Computer network where all the connected computers are within a limited geographical area (ex. home, school); connection between the computers may be through cables and/or microwave transmission
Term
microwave transmission
Definition
Electronic communication without the need for cables
Term
modem
Definition
Electronic equipment that converts computer digital signals into audio signals and back. The audio signals are transmitted over telephone lines, which allows for distant communication.
Term
network
Definition
Computer systems that are interconnected and can share resources and data
Term
packet
Definition
Groups of bits. May include control signals, error control bits, coded information, and the destination
Term
packet switching
Definition
Network communication method that creates and transmits small units of data (packets) through a network, independently of the overall message
Term
networking
Definition
Making use of a network
Term
parity bit
Definition
Error-detecting procedure that appends a binary digit to a group of binary digits. The sum of all the digits, including the appended binary digit, establishes the accuracy of the data after input, transmission, storage, or processing
Term
protocol
Definition
International rules that ensure the transfer of data between systems. A protocol that is recognized as the standard for a specific type of transfer is called standard protocol (ex. TCP/IP)
Term
TCP/IP (transmission control protocol / internet protocol)
Definition
Communications protocols used to connect hosts on the internet
Term
wide area network (WAN)
Definition
Computer network where all the connected computers are in a larger geographic area than that served by a LAN or MAN (metropolitan area network)
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