The figure shows a network design. Use it to answer the questions that follow

​(a) The figure shows a network design. Use it to answer the questions that follow.

​(i) Explain the function of each of the following in the network.

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I. Router

It is the device meant to forward data packets between computer network in the school and the internet.

II. Firewall

It is a device that prevents unauthorized access to or from a private network (school's LAN)

III. File server

It is a computer attached to a network whose purpose is to provide location for shared disk access (shared storage of computer files).

​(ii) State two categories of software that must be installed in a computer so that users can use it to access the internet. (2 marks)

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Software to be installed in a computer

1. Network operating system
2. Browser/Mozilla Firefox
3. Necessary system drivers to supports installed hardware
4. Protocols(SMTP,HTTP)

​(b) State four ways in which computers may be used to manage data in a research environment. (4 marks)

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​Use of computers in research for data management

1. Used for data manipulation;
2. Computers aid in data capturing;
3. Computers can be used to store researched and analyzed data;
4. Information in computers can be a secondary source of data;
5. Computers can be used to generate reports;
6. Computers can be used to communicate researched work.

​(c) Some computer companies have opted to use the Internet to provide shared processing resources and online application services to users. State three advantages that this approach will have on their customers. (3 marks)

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Advantages of online application services and shared processing resources.

1. Users will not be required to have powerful processing devices;
2. Users can access the services from anywhere in the world;
3. Users can access services at any time (24/7);
4. Users can offload their data to the cloud infrastructure;
5. Users can collaborate with remote users to process the data;
6. The approach will cut out high cost of hardware;
7. Sharing of resources;
8. Faster access to service;
9. Cost effective;
10. Orders are made without going to the shop.

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