Mapa mental

Online World

mh1574 Inglês

Conteúdo do mapa

Online World

CONNECTION TO THE INTERNET
- A computer- electronic device which is capable of receiving data
- ISP- provides access to the internet
- Modem- device or program that enables a computer to transmit data over
- broadband- high bandwidth connection to the internet
INTERENT PREVENTION
- Physical barriers- this includes turning off computers and locking offices
- password control of access- password sequence of numbers
- anti-virus software- software that can isolate the virus
  - firewall
  - encryption
  - backup and recovery
DATA EXCHANGE
- SIMPLEX- sends data in one direction only, radio broadcast
- half-duplex- allows two way transmissions, walkie talkie
- coder/decoder- program that is used to encode and/or decode binary data
- duplex- a communication system, allowing transmission of two signals in opposite dierctions-mobile
NETWORKS
- parallel transmission- a number of bits of data that are transmitted over number of wires
  - SERIAL TRANSMISSION- BITS THAT ARE TRANSMITTED ONE TIME AT OVER A SINGLE WIRE
    - bi-directional transmission- transmits in both directions