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Transfer of data in ICT systems

Transfer of data in ICT systems. Using ICT networks. Basic elements of an ICT network . There are four basic elements of an ICT network. These are: communication devices network software data transfer media network standards and procedures . Communication devices.

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Transfer of data in ICT systems

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  1. Transfer of data in ICT systems Using ICT networks

  2. Basic elements of an ICT network There are four basic elements of an ICT network. These are: • communication devices • network software • data transfer media • network standards and procedures

  3. Communication devices A network interface card: • prepares data for sending over the network • sends the data • controls the flow of data from the computer terminal to the transmission medium

  4. Communication devices A hub: • is used to join computers in a network • allows the connection of cables • allows the sharing of files and Internet access

  5. Communication devices A switch: • is a similar device to a hub but more intelligent • can look at a packet of data to decide where it should go • reduces the number of packets of data on a network, which speeds the network up

  6. Communication devices A router: • can be wired or wireless • is used to join several networks together • is often used to connect several computers in the home to the Internet

  7. Networking software Network software consists of: • network operating systems – specialist operating systems designed specifically for networks • network management software – used to help a network manager run a network by keeping track of software, keeping software up-to-date, installing software security patches, helping to manage the help-desk, etc.

  8. Data transmission medium The medium/method by which the data is transmitted in a network can be: • metal wire • fibre optic cable • wireless

  9. Standards and protocols • communication software manages the flow of data across the medium • it also establishes certain rules, called protocols, by which computers can communicate • standards are needed so that all network devices work in a similar way

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