Option 1: Artificial Intelligence, Simulation and Modelling



Name Date Class

Literacy worksheet 6.4

Data handling

Common two- and three-letter words have been substituted with symbols. Decode the information.

Networking systems ( designed ( ( transfer • data. Files may ( stored ( a central server, ( access ( them may rely ( ( network ( place. Most networks transfer data with serial transmission. Data ( sent one bit after another along ( connecting channels, usually ( packets • data. Packets contain data ( ( front indicating ( destination • ( packet.

Broadband systems transfer data ( a similar fashion ( parallel data transfer. Multiple packets • data can ( sent ( once through ( connecting cabling. Optic fibres utilise broadband transmission.

( speed • a network ( measured ( how many bits can ( transferred per second. ( main parts • larger networks usually have transmission rates measured ( gigabits per second.

Data security becomes an issue with computer networks because • ( large volumes • data being transferred through ( network. Encryption technology ‘scrambles’ ( data before it ( sent, ( it ( decrypted when it arrives ( its destination. ( receiving computer must possess ( correct ‘key’ ( ( able ( decode ( data correctly. Insecure network sections often involve wireless data transmission—infra-red signals ( radio transmitters (short distance), microwave signals (mid-distance), ( satellites (long distance).

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