Cambridge A Level Applied Information and Communication Technology 9713 — 2015 May/June Paper 3 · Variant 2

This document consists of 18 printed pages and 2 blank pages. DC (NF) 101349/3 © UCLES 2015 [Turn over Cambridge International Examinations Cambridge International Advanced Level * 3 4 7 5 7 2 7 6 0 5 * APPLIED INFORMATION AND COMMUNICATION TECHNOLOGY 9713/32 Paper 3 May/June 2015 1 hour 15 minutes Candidates answer on the Question Paper. No additional materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. Do not use staples, paper clips, glue or correction fluid. You may use an HB pencil for any diagrams, graphs or rough working. DO NOT WRITE IN ANY BARCODES. Answer all questions. The number of marks is given in brackets [ ] at the end of each question or part question. The businesses described in this paper are entirely fictitious.

2 9713/32/M/J/15 © UCLES 2015 Scenario 1 Questions 1, 2 and 3. Stoner school has a cabled local area network (LAN) and a wireless local area network (WLAN) that allows users to share peripherals, to exchange data and to access the internet. The network uses a variety of protocols to transfer data. A user is required to provide a UserID (user name) and a password when logging into the network.

3 9713/32/M/J/15 © UCLES 2015 [Turn over 1 (a) Describe how the UserID (user name) is processed to allow the user to gain access to the network. … … … … … … … … [3] (b) Describe how the entry of a password by a user completes the login process. … … … … … … … … [3]

4 9713/32/M/J/15 © UCLES 2015 2 (a) Describe two benefits to staff and students of using the WLAN. 1 … … … … … … 2 … … … … … … [4] (b) Describe two drawbacks to staff and students of using the WLAN. 1 … … … … … … 2 … … … … … … [4]

5 9713/32/M/J/15 © UCLES 2015 [Turn over 3 Tick one box in each table to choose the most appropriate protocol for each of the tasks listed. (a) Downloading a file over the internet. () FTP https SSH Telnet UDP [1] (b) Transferring a web page from a server to a client computer. () FTP https SSH Telnet UDP [1] (c) Remote access to a computer. () FTP https SSH Telnet UDP [1]

6 9713/32/M/J/15 © UCLES 2015 (d) Streaming video over a network. () FTP https SSH Telnet UDP [1]

7 9713/32/M/J/15 © UCLES 2015 [Turn over Scenario 2 Questions 4, 5, 6, 7 and 8. A bridge is to be constructed across a river. The bridge will be modelled in a computer system and a scale model prototype will be built before the real bridge is constructed. Computer Aided Design and Computer Aided Manufacture software (CAD/CAM) will be used to create the prototype. A mainframe computer will be used to create and test a computer model of the bridge. Project management software is to be used to create a project plan for the building of the bridge.

8 9713/32/M/J/15 © UCLES 2015 4 Describe how features of CAD/CAM could be used to create the prototype of the bridge for testing. … … … … … … … … … … … … … … … … … … … … [8] 5 Explain why a mainframe computer was chosen to create and test a computer model of the bridge. … … … … … … [2]

9 9713/32/M/J/15 © UCLES 2015 [Turn over 6 (a) Describe two advantages of using a computer model to test the bridge. 1 … … … … 2 … … … … [2] (b) Describe two disadvantages of using a computer model to test the bridge. 1 … … … … 2 … … … … [2]

10 9713/32/M/J/15 © UCLES 2015 7 Describe two features of project management software that could be used to organise the stages of the planning and construction of the bridge. 1 … … … … … … 2 … … … … … … [4] 8 Designing and testing a prototype are two stages in the construction project that must be scheduled in the project plan. State three other stages in the bridge construction that must be scheduled. 1 … … 2 … … 3 … … [3]

11 9713/32/M/J/15 © UCLES 2015 [Turn over Scenario 3 Questions 9, 10, 11 and 12. Governments provide online facilities to increase access to employment opportunities and to health, legal and political services. The digital divide is the gap between individuals and groups of people who are able to make effective use of ICT and those who are not able to do so. The digital divide affects many areas including access to health services and employment opportunities.

12 9713/32/M/J/15 © UCLES 2015 9 Explain, with an example, what is meant by the global digital divide. … … … … … … … … … … [4]

13 9713/32/M/J/15 © UCLES 2015 [Turn over 10 Explain how the digital divide can limit people’s employment opportunities. … … … … … … … … … … … … … … … … … … … … [8]

14 9713/32/M/J/15 © UCLES 2015 11 Discuss the benefits and drawbacks of individuals being able to access legal information online. … … … … … … … … … … … … … .…….….……… ………………………………………..………………….………………… … … … … … … [8]

15 9713/32/M/J/15 © UCLES 2015 [Turn over 12 Explain how the digital divide can affect access to health services. … … … … … … … … … … … … [5]

16 9713/32/M/J/15 © UCLES 2015 Scenario 4 Questions 13, 14 and 15. Sensors are used to collect data about physical variables. The data is sent to a computer for storage and analysis. Weather stations use sensors to collect data about the weather such as the temperature and barometric pressure. Hospitals use sensors to collect data, such as body temperature and blood pressure, which are used by computers for monitoring patients in intensive care units.

17 9713/32/M/J/15 © UCLES 2015 [Turn over 13 Other than sensors for measuring temperature and barometric pressure, state four sensors that could be used when monitoring the weather and describe a use for each. 1 … … … 2 … … … 3 … … … 4 … … … [4] 14 Describe how the data from sensors could be used for monitoring a patient in an intensive care unit. … … … … … … … … … … [4]

18 9713/32/M/J/15 © UCLES 2015 15 Explain the benefits and drawbacks of monitoring patients using computers in an intensive care unit. … … … … … … … … … … … … … … … … … … … … [8]

19 9713/32/M/J/15 © UCLES 2015 BLANK PAGE

20 9713/32/M/J/15 © UCLES 2015 BLANK PAGE Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cie.org.uk after the live examination series. Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.

® IGCSE is the registered trademark of Cambridge International Examinations. CAMBRIDGE INTERNATIONAL EXAMINATIONS Cambridge International Advanced Level MARK SCHEME for the May/June 2015 series 9713 APPLIED INFORMATION & COMMUNICATION TECHNOLOGY 9713/32 Paper 3 (Written B), maximum raw mark 80 This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers. Cambridge will not enter into discussions about these mark schemes. Cambridge is publishing the mark schemes for the May/June 2015 series for most Cambridge IGCSE®, Cambridge International A and AS Level components and some Cambridge O Level components.

Page 2 Mark Scheme Syllabus Paper Cambridge International A Level – May/June 2015 9713 32 © Cambridge International Examinations 2015 1 (a) Three from: [3] database of UserIDs stored on system system checks entered User ID against database (of user IDs on server) when it finds a match it retrieves details such as passwords (when password entered), system allows access based on UserID ...and allocates privileges ...if server cannot find User ID, login is rejected (b) Three from: [3] database of passwords linked to UserIDs stored on system system checks the password against database of passwords/stored passwords ...to check that the password is associated with the entered User ID if password found, login is completed if password is incorrect, user is asked to retype password if e.g. three failed attempts are made, then login is rejected for that User ID 2 (a) Two benefits from e.g.: [4] can access WLAN from anywhere within range/building ...can be mobile/move around ...can use same device anywhere in building can access same peripherals e.g. printers while mobile can use own devices ...at home and at school health/safety issue e.g. reduced trip hazard from trailing cables can have extended network coverage beyond the wired LAN (b) Two drawbacks from e.g.: [4] security concerns ...WLANs must use security keys ...security key will be known to many ...less secure than a wired connection interference from other devices ...reduces data transfer rates leading to apparent slower speeds of e.g. web access increased distance from connection/access point ...low signal strength ...can lead to loss of connectivity bandwidth is lower than cabled networks ...reduces data transfer rates leading to apparent slower speeds of e.g. download ...large number of users can lead to slower rate of data transfer

Page 3 Mark Scheme Syllabus Paper Cambridge International A Level – May/June 2015 9713 32 © Cambridge International Examinations 2015 3 (a) Tick as shown: [1] (
) FTP
https SSH Telnet UDP (b) Tick as shown: [1] (
) FTP https
SSH Telnet UDP (c) Tick as shown: [1] (
) FTP https SSH Telnet
UDP

Page 4 Mark Scheme Syllabus Paper Cambridge International A Level – May/June 2015 9713 32 © Cambridge International Examinations 2015 (d) Tick as shown: [1] (
) FTP https SSH Telnet UDP
4 Eight from: [8] CAD design accurate drawings of bridge components ...using database/library of pre-prepared components to speed up design process component tested before produced ...under variety of conditions 3D views to allow walk-around/view final product total cost of a product can be calculated …using a database of parts held by program CAM Computer Aided Manufacture linked to computer system CAD generates a list of instructions ..for the manufacturing device/lathe/3D printer to cut components to designed dimensions using LOGO type commands to set the dimensions of the prototype 5 Two from: [2] mainframes have high processing power/fast processing speed vast amount of data to be processed ...which would take too long if done by human/non-mainframe computer large number of rules/parameters to be processed 6 (a) Two from e.g.: [2] parameters can be changed model can be tested to destruction tests can be repeated extreme conditions can be modelled no danger of hurting people no materials wasted can investigate the financial implications of different designs

Page 5 Mark Scheme Syllabus Paper Cambridge International A Level – May/June 2015 9713 32 © Cambridge International Examinations 2015 (b) Two from e.g.: [2] not all parameters can be modelled/tested so test is incomplete the assumptions/rules of the model may be faulty/not accurate so test results may not be accurate custom software is needed for large/complex models which maybe expensive/take too long to produce need access to fast/mainframe for large/complex models which may be expensive 7 Two from: [4] Gantt charts: ...show clearly the stages /tasks in project ...can be used as a communication device between team members ...permits time management of project ...allows flexibility in project management ...parallel and sequential tasks with appropriate examples can be represented ...progress of each task with appropriate example can be shown Pert (Project Evaluation and Review Technique) Charts: facilitates decision making ...number events sequentially to allow the later insertion of additional events two consecutive events in a PERT chart are linked by activities ...represented as arrows events shown in a logical sequence ...no activity can commence until its immediately preceding event is completed milestones should be PERT events and decides their “proper” sequence may have multiple pages with many sub-tasks Critical path analysis ...to determine the most cost-effective/time-effective order of tasks Event chain diagrams events are shown as arrows ...names and/or IDs of events are shown next to the arrow events with negative impacts (risks) are represented by down arrows events with positive impacts (opportunities) are represented by up arrows individual events are connected by lines showing the event chain PRINCE divides project into number of processes uses common language so all can understand Max 3 per feature 8 Three from e.g: [3] hiring (construction) workers preparing the ground building foundations construct main supports constructing bridge sections delivery of bridge sections testing of construction project completion

Page 6 Mark Scheme Syllabus Paper Cambridge International A Level – May/June 2015 9713 32 © Cambridge International Examinations 2015 9 Four from: [4] disparities/gap ...between developed and developing countries/regions regarding access to computing/ICT regarding skills in computing/ICT regarding opportunities related to computing/ICT One mark for valid example e.g. access to internet 10 Eight from e.g.: [8] ICT skills enhance employment prospects people in some countries/regions may not have access to computers/IT facilities infrastructure, people in some countries/regions may not support computers/IT facilities people lacking ICT skills will not be employed so easily people lacking ICT skills will not be able to use ICT to search for jobs people lacking ICT skills will not be able to use ICT to apply for jobs people lacking ICT skills will not be able to use ICT to create CVs areas lacking ICT infrastructure will not be able to access advertising for jobs/job searches schools and colleges without ICT access cannot teach ICT skills richer schools have ICT facilities to teach their students so increasing the digital divide/providing employable skills for their students 11 Eight from e.g.: [8] Benefits: access to legal information from e.g. home no need to book an appointment with lawyer ...some people may be intimidated by lawyers ...reduced costs e.g. travel costs access to legal information without having to pay law firms can access the information whenever it is convenient access to information on family matters e.g. divorce, child care without visiting a lawyer access to advice on e.g. house purchases without paying estate agents fees access to changes in regulations and laws/updated regulations and laws online consultations with lawyers to get personalised advice Drawbacks: legal advice may be misinterpreted/not understood online data may be deliberately altered to mislead unqualified people may use advice and mislead others individuals may not be able to find/make of all the relevant information Max 6 for all benefits or all drawbacks

Page 7 Mark Scheme Syllabus Paper Cambridge International A Level – May/June 2015 9713 32 © Cambridge International Examinations 2015 12 Five from e.g.: [5] areas with good access to ICT have better access to (online) health services areas with poor access have reduced/no access to (online) health services online consultations possible in areas with ICT access ...not possible in areas without access to ICT disabled people/valid example with ICT skills have increased access to health services ...those without the skills cannot get access health services without e.g. travelling updated/general health information is available on the internet for those with ICT access ...those without ICT access are denied the health information updates 13 Four sensors from e.g.: [4] humidity to measure water in air anemometer speed of wind angle sensor direction of wind tipping sensor rainfall light sensor sunshine/light 14 Four from: [4] sensors to measure the variable when connected to patient data from physical variables sent to computer system .. via ADC example of physical variable e.g. breathing rate computer analyses data/compares with pre-set data displays results on monitor for viewing by nurses/doctors computer produces alert/warning if physical variables go outside set parameters 15 Eight from e.g: [8] Benefits: automatic recording of data from patient for review automatic chart production for reports/analysis by medical staff remote monitoring of patient ...nurses can be alerted quickly computers can monitor more than one variable per patient simultaneously computers can monitor many patients at once ...nurses can supervise/watch over many patients at once ...nurses are freed up to other tasks patients monitored 24/7 patients monitored continuously Drawbacks: patient does not get personal care not all parameters may be monitored (e.g. blood sugar level) alarm may be overlooked/ignored cost of equipment purchase/maintenance power failure/computer failure can cause loss of data/monitoring/affect patient safety Max six for all benefits or all drawbacks.