Examen Tisg 2005 Noviembre

c

IB DIPLOMA PROGRAMME PROGRAMME DU DIPLÔME DU BI PROGRAMA DEL DIPLOMA DEL BI

N05/3/ITGSX/SP1/ENG/TZ0/XX/M+

MARKSCHEME
NOVEMBER 2005

INFORMATION TECHNOLOGY IN A GLOBAL SOCIETY

Standard Level

Paper 1

10 pages

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N05/3/ITSGX/SP1/ENG/TZ0/XX/M+

This markscheme is confidential and for the exclusive use of examiners in this examination session. It is the property of theInternational Baccalaureate and must not be reproduced or distributed to any other person without the authorization of IBCA.

-31. (a)

N05/3/ITGSX/SP1/ENG/TZ0/XX/M+

Identify two peripherals, other than printers, that could be connected to the LAN. [2 marks] Award [1 mark] for each peripheral identified up to a maximum of [2 marks]. • • • • • • • • • • scanner webcam fax machine plottersCD-ROM tower DVD tower modem network capable photocopier interactive whiteboard projector.

Do not accept digital camera. Do not accept answers, which identify peripherals accessed only from a local computer. Reward other acceptable answers only with the approval of the team leader. (b) Describe two advantages of having a network of computers in the office instead of [4 marks] severalstand-alone computers. Award [1 mark] for each advantage that is clearly identified up to a maximum of [2 marks]. Award [1 additional mark] for the further description or consequence of each advantage up to a maximum of [2 additional marks]. Identification of the advantage [1 mark] and further description [1 additional mark] share data files across the network [1 mark] • description (e.g. time efficiency)[additional 1 mark] share peripherals [1 mark] • description (e.g. cutting costs of buying peripherals, maximizing use of peripherals) [1 additional mark] • use networked versions of software [1 mark] description (e.g. cutting costs of software, consistency of workers accessing common versions of software and/or applications/ease of performing upgrades) [1 additional mark] • work collaboratively onthe same files [1 mark] description (e.g. improving efficiency) [1 additional mark] • monitor use/abuse by recording network access by users [1 mark] description (e.g. improving efficiency of office workers by record keeping, identify potential unauthorized access and problems) [1 additional mark] • capability to filter incoming data on server [1 mark] description (e.g. save time and cost byprotecting the network instead of installing filtering software on individual stand-alone computers) [1 additional mark]. • central control [1 mark] description (e.g. unlocking blocked accounts or other maintenance) [1 additional mark]. • messaging / communication [1 mark] description (e.g. can log on from any station, flexible and efficient) [1 additional mark]. Reward other acceptable answers onlywith the approval of the team leader.

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(c)

Describe two ways in which a network administrator could protect the computers in the network against virus attack. [4 marks] Award [1 mark] for each way that is clearly identified up to a maximum of [2 marks]. Award [1 additional mark] for further description of each way up to a maximum of [2 additionalmarks]. Identification of the way [1 mark] and further description [1 additional mark] • installing anti-virus software on all computers [1 mark] description (e.g. regularly updating) [1 additional mark] Do not accept brand name for second mark. • installing network software that strips executable files from email attachments [1 mark] description (e.g. viruses are often spread through executable filesattached to emails) [1 additional mark] • controlling access permissions [1 mark] description (e.g. using network login to restrict users’ access to other parts of the network so viruses are not spread) [1 additional mark] • preventing users downloading files from the Internet [1 mark] description (e.g. many viruses are hidden in downloaded files) [1 additional mark] • locking or disabling the...