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GCE JAN 2009 : ( A2 13) Networking and Communications

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Centre Number 71 Candidate Number ADVANCED General Certi cate of Education 2009 Applied Information and Communication Technology Assessment Unit A2 13 assessing Unit 13: Networking and Communications [A6J71] FRIDAY 16 JANUARY, MORNING TIME 1 hour 30 minutes. INSTRUCTIONS TO CANDIDATES Write your Centre Number and Candidate Number in the spaces provided at the top of this page. Answer all sixteen questions on the paper in the spaces provided. Quality of written communication will be assessed in all questions. For Examiner s use only Marks Question Marks available The total mark for this paper is 100. Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each question or part question. ADVICE TO CANDIDATES You are advised to take account of the marks for each part question in allocating the available examination time. 4323 6 8 6 2 6 8 15 10 4 5 4 3 6 3 6 8 Total INFORMATION FOR CANDIDATES 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 100 Remark 1 Each device in the table below may be connected to a computer using either a parallel port or a serial port when transferring data. In the table below tick ( ) to indicate which port the device named may typically have been connected to. (Note: It is possible to put a tick in both boxes) Device Parallel Examiner Only Marks Serial Modem Mouse Printer Scanner 2 [6] During data transmission parity checking is a checking method that is used to determine if a byte has been sent and received correctly. Complete the following sentences. When a byte is received (a) the sent byte will be transferred . (b) the start bits will be . (c) the number of bits in the data byte plus are . The total number of bits is compared and will give an odd or even number. (d) If the totals match then the and the byte is considered to have been sent (and received) properly. (e) If the totals do not match then it means that . (f) When this happens and . [8] 4323 2 Remark 3 Consider the following diagram (Fig. 1) which shows how a data packet is sent during synchronous data transmission. Examiner Only Marks Remark data packet SYN SYN SOH Header Text STX ETX BCC Direction of travel Fig. 1 The text in the data packet is surrounded by a number of bytes. Explain the main function of the bytes listed below. (a) SOH (b) STX (c) BCC [6] 4323 3 [Turn over 4 The diagram Fig. 2 shows a computer network card. Name the type of network in which you would expect to nd this card. Give one reason for your choice. Examiner Only Marks Fig. 2 [2] 4323 4 Remark 5 (a) A small business has four stand alone Personal Computers plus a laser printer. Using another piece of hardware that the company must buy, draw a labelled sketch to show how the computers, the printer and the hardware device might be linked in a simple peer to peer network. Examiner Only Marks Remark (b) Name and describe the hardware device that the company should buy. (c) Explain what type of software is needed to enable the four computers to function in the peer to peer network. [6] 4323 5 [Turn over 6 A small company with 12 employees has an older bus based network of 15 computers with a laser printer. The network has a dial up Internet connection. Some employees use the Internet a lot for business purposes, other employees send multimedia les across the local network and others are mainly using the network for administration and word processing. All employees print out on the laser printer. One of the employees has network management responsibilities and she has received a number of complaints about problems occurring on the network recently. Name two such problems which may occur and give a solution to each of the problems you have mentioned. (a) Problem 1 Solution to problem 1 (b) Problem 2 Solution to problem 2 [8] 4323 6 Examiner Only Marks Remark 7 A large commercial organisation uses a client server network to manage its business. The server supports over 30 stations distributed over three oors in the building (with a maximum of 12 computers per oor). Each group of computers on each oor is connected to a switch. Examiner Only Marks Remark (a) Explain what is meant by the term client server. [2] Give two business advantages for the company to use a client server network. Advantage 1: Advantage 2: [2] (b) Explain the purpose of the switch found on each oor. [2] 4323 7 [Turn over (c) The company wants to upgrade its existing IT software. Explain brie y how the client-server set up makes this a straightforward process. [2] (d) The company is considering giving all employees access to the Internet. Identify and describe one hardware component necessary to allow this to happen. Hardware component: Description of component: [3] (e) The company would also like the employees to use a company intranet. Describe two business items that the employees might expect to nd on the company intranet. Intranet business item 1: Intranet business item 2: [4] 4323 8 Examiner Only Marks Remark 8 (a) Employees in a manufacturing company communicate and send documents to other businesses by fax. They have found this unsatisfactory for a number of reasons and have decided to use e-mail instead. Brie y describe three main bene ts of using e-mail for business purposes. Examiner Only Marks Remark Bene t 1: Bene t 2: Bene t 3: [6] (b) Suggest two methods for protecting a user e-mail account from a virus attack. Method 1: Method 2: [4] 9 Consider the following sentences which relate to Ethernet. Ethernet follows a simple set of rules that governs its basic operation. It uses transmission where the to transmit the medium is used i.e. the raw data is transmitted using the full bandwidth of the medium with no . Fill in the blanks with words from the list below. (A word can only be used once). modulation transmit whole baseband signal broadband network [4] 4323 9 [Turn over 10 Complete the table below as shown by matching the most appropriate statements. 1 2 3. 4. 5 6. 7. A router DHCP . CSMA/CD . Wireless networking . A proxy server . A ring network topology .. The WEP key . A. B. C. D. E. F. G. Examiner Only Marks E C is a type of wireless encryption. uses radio waves to send data. is used within an Ethernet bus network. is a computer that stores recently accessed web pages. is used when connecting to the Internet. sends data using a token. is a protocol that allocates IP addresses. [5] 11 When a company s employees connect to the Internet the company will use a rewall to do some of the following tasks. Place a tick ( ) in the appropriate boxes that describe what a rewall does. A rewall prevents most viruses from entering the company network. is a sprinkler system that stops res from destroying the servers. can act as a proxy. controls traf c between networks. can prevent certain web pages from being viewed. contains the companies Acceptable Use Policy (AUP). [4] 4323 10 Remark 12 Tick ( ) the features below you would expect to nd in a star topology type network. Examiner Only Marks Remark A star topology assigns IP addresses to computers in the star. stores network card serial numbers in a data le. uses an address resolution protocol (ARP) to look up web pages. can use a hub to transmit to all stations in a network. can use a switch in a peer to peer network. can be used in a client-server network. [3] 13 The following sentence describes the term Uniform Resource Locator (URL) used on the Internet. URL is the name corresponding to the address of a computer on the Internet. URL is the of a resource on the Internet. URL must be access your . Internet users using your URL. An example of a URL is . Fill in the blanks with words from the list below. (A word can only be used once). unique numeric IP secure www.abc.com abc.com server website typical text address personal account [6] 4323 11 [Turn over 14 In the table below tick only those features that apply to wireless networking. It uses infra red transmission media to save les. It uses Ethernet technology to transmit data. It can be subject to war driving. It uses CAT5 cabling. It can be used in home networking. It can use encryption to protect data transmission. [3] 15 Local area networking has advantages and disadvantages. Name and describe two advantages and one disadvantage of LAN. Advantage of LAN: Advantage of LAN: Disadvantage of LAN: [6] 4323 12 Examiner Only Marks Remark 16 Choose the correct words from the list below to complete the following paragraphs on wireless networking. (A word can only be used once.) Examiner Only Marks rewall bigger WEP faster Ethernet detection parallel hotspots vulnerable video hub slower server encryption RAM text Wireless networks are than those that are directly connected through an cable. A serious problem for wireless networks is the speed of downloads. A wireless network is more than a network using cable because anyone can try to break into a network which is broadcasting a signal. Wireless networks use wireless traf c security. Many networks offer for because many wireless networks have been found to be susceptible to intrusion. Although this blocks some intruders, the security problems have caused some businesses to stick with wired networks until security can be improved. The use of a will also help prevent security breaches. Wireless networks may be available to the general public in areas called . The public can nd these in areas such as airports, hotels and train stations. [8] THIS IS THE END OF THE QUESTION PAPER 4323 13 Remark

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Additional Info : Gce Applied ICT January 2009 Assessment Unit A2 13 - Networking and Communications
Tags : General Certificate of Education, A Level and AS Level, uk, council for the curriculum examinations and assessment, gce exam papers, gce a level and as level exam papers , gce past questions and answer, gce past question papers, ccea gce past papers, gce ccea past papers

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