2.1.1.2 State the meaning of input, process, output and storage.

Input

Input is any data or instructions that we enter into the computer system for processing. There are four types of input: which are text, graphic, audio and video. Example of input devices are keyboard, light pen, joystick, microphone, mouse, video & digital camera.

Process

The processing unit controls all activities within the system. The CPU is an example of a processor. It has the same important as the brain to human being.

Storage

Storage is a location which data, instruction and information are held for future use. It is the physical material that keeps keeps data, instruction and information. There are two types of storage. They are the primary storage and secondary storage. The example of storage devices are hardisk, Floppy Disk, diskette, RAM, CD ROM and DVD ROM.

Output

Output is data that has been processed into a useful form, called information. There are four types of output, which are texts, graphics, audio and video. Example of output devices are monitor, printer, speaker and plotter.

2.1.1.3 Describe the information processing cycle which includes input, process, output and storage.

Input

Users input data or instruction into the computer system to be process. Input could be either text, graphic, audio or video. Input devices are used by users to input data. Input devices are any electronic device connected to a computer and produces input signals.

Process

Data or instruction being input into the computer system is then processed by the CPU which controls all activities within the system. The results of the processed data are then sent to an output device as usable data.

A CPU interprets the and carries out the instructions by processing data and controlling the rest of the computer’s components.

A CPU consists of two subcomponents; the Control Unit (CU) and the Arithmetic Logic Unit (ALU). CU’s main function is to direct the CPU to process data by extracting instructions from memory and decodes and executes them. The CU manages a four-step basic operation which is called a machine cycle. The steps are Fetching, Decoding, Executing & Storing:

Storage

Computer storage is important to help users store programs and data to be used at a later time.

It is also useful to keep current data while being processed by the processor until the information is saved in a storage media such as a hard disk or a diskette. Computer storage also stores instructions from a computer program. There are two type of computer storage; primary storage and secondary storage.

2.1.1 Overview Of Computer System

2.1.1.1 Define computer systems.

A computer system is defined as combination of components designed to process data and store files. A computer system consists of four major hardware components; input devices, output devices, processor and storage devices. A computer system requires hardware, software and a user to fully function.

1.4.1.1 Locate information from various sources

Informations or study materials are available offline and online. We can search for the information that we want in books, journals, articles or other resource materials found in the library and the Internet. A list of all the books, journals and electronic materials are available from the library. We can use the online databases to find the most useful materials for our study.

1.4.1.2 Describe the impact of ICT on society

The computer has change the society today as much as industrial revolution changed society in 18th and 19th century. People interacts directly with computer in education, finance, government, health care, science, publishing, tourism, and industry.

Computers help them to do their work faster and more efficient by using the software application that consist of special program for specific task.

Education

Today, computers are used in schools, colleges and universities to promote better education. Students use software packages to complete their assignments. Educators use the computer-based training and web-based training as replacements for lecture presentation.

Computers for Higher Education

Open Distance Learning (ODL) or online learning can be implemented as computers are the main medium in delivering the knowledge from one location to the other locations. This type of learning consists of online forum, discussion, quizzes, test questions and many more. The example of the Open Distance Learning institution is the Open University of Malaysia.

Business

People use finance or accounting software to balance check books, pay bills, track personal income and expenses, manage investments and evaluate their financial plans. Accounting software helps companies to record and report their financial transactions.

Computers in Banking

In the banking sector, many financial institutions offer online banking. People can access their financial records from anywhere in the world. One example of online banking is Maybank2u. Most of the packages on banking offer a variety of online services which requires access to the web. For example we can track our investment online, compare insurance rates and do online banking.

Industry

By using the CAM system, computers record actual labour, material, machine and computer time used to manufacture a particular product. Computers process this data and automatically update inventory, production, payroll and accounting records on the company’s network.

Examples of companies using this system are Proton and Perodua.

Graphics and Multimedia

Computers are crucial in publishing especially in the process of making works available to the public. These works include magazines, books, newspapers, music and film production. Special software applications are used to assist graphic designers to develop graphics, texts, photographs and composing songs.

Communication

A government provides society with direction by making and administering policies. Most government offices or agencies have websites in order to provide citizens with up-to-date or latest information. Examples of software applications used for communication include e-mail, web browsers, newsgroups, instant messaging and video conferencing. We can access government websites to:

• check information on taxes (www.hasil.org.my)
• pay parking tickets and check summons (www.jpj.gov.my)
• register online for IPTA/IPTS application (www.moe.gov.my)
• Computers in Tourism

Today, people will go online to get all related information about traveling. They can visit websites to get information on destinations, prices, hotels, flights and car rentals. They can also purchase ticket online, all payments can be made by using credit card.

Computers in the Healthcare

In the medical field, computers are very important in running the operations. Medical staffs use computers for various purposes, namely: • maintaining patient records monitoring patients’ vital sign assisting doctors, nurses and technicians with medical tests by using computer and computerised devices .

• using medical software to help with researching and diagnosing health conditions.

Furthermore, computers and the internet are important sources for people to get all information on medical, nutrition, fitness and other tips from several available websites. The latest development in the medical field is telemedicine which help professional to conduct live conference in separate locations around the globe.

Science

In the scientific world, computers are used in all fields of science from biology to astronomy to meteorology and others. These are things that can be done by computers, namely:

• collecting, analyzing and modelling data
• serving as medium of communication with colleagues around the world
• contributing to new inventions or breakthrough in surgery, medicine and treatment
• imitating functions of the central nervous system, retina of the eye and others by tiny computers
• allowing a deaf person to listen through cochlear implant

1.4.1.3 Present results in a clear, concise manner.

A good presentation should contain three well-defined sections, they are:

1. Introduction

• is at the beginning of the research
• includes the objectives of the research
• provides a clear statement on why the study was undertaken
• includes the limitations/assumptions and analytical techniques

2. Content

• consists of facts or arguments related to subject matter
• can be presented in an argument format or just as an overview

3. Conclusion

• is a review of content (not repetition of content)
• relates to the statement of objectives in the introduction
• should not introduce new issues
• should contain judgment or decision that has been reached

1.4.1.4 Display cooperation in conducting study.

Cooperation in conducting study can be display through delegation of works among team members. Delegation is the ability to assign tasks to others with the authority, responsibility and accountability to finish the tasks. This means it is not enough to just give out orders to people but as a team leader you also need to give specific instructions on what to do. Tell your team members that they are responsible for the task given to them and explain to them what would happen to the project if they failed to finish the task.

Computer security means protecting our computer systems and the information they contain against unwanted access, damage, destruction or modification. Three types of computer security are: hardware security software security/data security network security

We need to protect our computer from any intruders such as hackers, crackers and script kiddie.

 

Malicious code

Malicious code is also known as a rogue program. It will cause undesired effects in the programmer’s part. The effect is caused by an agent, with the intention to cause damage. The agent for malicious code is the writer of the code who causes its distribution. There are various kinds of malicious code. They include virus, Trojan horse, logic door, trapdoor and backdoor, worm and many others.

Hacking

Hacking is defined as unauthorised access to the computer system by a hacker. Hackers are persons who learn about the computer system in detail. They write program referred to as hacks. Hackers may use a modem or cable to hack the targeted computers.

Natural disaster

Computers are also threatened by natural or environmental disaster. Examples of natural and environmental disasters:

• Flood
• Fire
• Earthquakes, storms and tornados
• Excessive Heat
• Inadequate Power Supply
• Theft

Two types of computer theft:

1) Computer is used to steal money, goods, information and resources.

2) Stealing of computer, especially notebook and PDAs.

1.3.3.2

Apply the correct security procedures.

Data Protection

We need to protect the data in the computer as it may somehow get lost or corrupted due to some viruses or mishap like fire, flood, lightning, machine failures and even human errors. There are a few ways to protect the information namely:

• make backup files

• detect the virus and clean the computer

• warn others on virus attacks

Detecting Illegal Access To Systems

The computer system is able to detect any illegal access to the system by a user who does not have any authorisation. Tcpwrappers and tripwire are often used to detect any illegal access (unauthorize) to the system. User's access will be reviewed periodically by computer operations. On going internal audits will be made to ensure detection of violations of security and unauthorised modifications to software and data .

Tcpwrappers will control access at the application level, rather than at the socket level like iptables and ipchains. The system will run tcpwrappers to log access to ftp, tftp, rch, rlogin, rexec and telnet.

Tripwire will detect and report on any changes in the thousands of strategic system files. The system will run tripwire to determine if system files have changed.

Preventing Illegal Access To Systems

Computer systems would not allow any unauthorised users to simply access the system. Ways to prevent illegal access to systems: • Run anlpassword to make password cracking difficult. Run tcpwrappers to check if the name for an ip address can be provided by DNC Use a callback system to prevent unauthorised use of stolen passwords.

Preventing Illegal Root Access

To prevent any illegal root access, we should have Sudo (stands for Superuser do) so that people can perform on some machine without getting access to the entire root if that is not required. In addition, with Sudo we did not have to give out the root password.

Sudo is a program in Unix, Linux and similar operating systems such as Mac OS X that allows users to run programs in the form of another user (normally in the form of the system's superuser). Sudo allows a permitted user to execute a command as the superuser or another user, as specified in the sudoers file.

Patch

Patch supplies small updates to software, provided that the source code is available. Patch is a name of an UNIX utility. It applies a script generated by the different program to a set of files that allows changes from one file to be directly applied to another file. Resources are not enough to patch all security holes that we hear about through the bugtraq list.

 

Computer fraud is defined as having an intention to take advantage over or causing loss to other people, mainly on monetary basis through the use of computers. Computer fraud includes e-mail hoaxes, programme fraud, investment schemes, sales promotions and claims of expertise on certain fields.

Students need to be aware of other computer frauds such as health frauds, scams and hacking. Students will also most likely get false information while researching information on the Internet.

Copyright Infringement:

Copyright infringement is defined as a violation of the rights secured by a copyright. It involves illegal copy or reproduction of copyrights material by the black market group. The open commercial sale of pirated item is also illegal. With the current technology, the most perfect copy of the original copy can be downloaded from the internet.

Theft:

Computer theft is defined as the unauthorised use of another person’s property with the intention to deny the owner the rightful possession of that property or its use. Examples of computer theft include: • transfer of payments to the wrong accounts tap into data transmission lines on database at no cost divert goods to the wrong destination

Attacks:

Computer attack may be defined as any activities taken to disrupt the equipment of computer systems, change processing control or corrupt stored data.

Computer attack can be in the forms of: physical attack that disrupt the computer facility or its transmission lines. an electronic attack that uses the power of electromagnetic energy to overload computer circuitry. a computer network attack that uses a malicious code to exploit a weakness in software, or in the computer security practices of a computer user.

Cyber Law is needed as in the recent years, many concerns and issues were raised on the integrity and security of information, legal status of online transactions, privacy and confidentiality of information, intellectual property rights and security of government data placed on the Internet.

Cyber Law is needed as in the recent years, many concerns and issues were raised on the integrity and security of information, legal status of online transactions, privacy and confidentiality of information, intellectual property rights and security of government data placed on the Internet.

Pornography

Pornography: can lead to criminal acts such as exploitation of women and children can lead to sexual addiction or perversion can develop low moral value towards other men, women or children can erode good religious, cultural and social beliefs and behaviour

Slander: can develop into a society that disregards honesty and truth can develop bad habit of spreading untruths and rumours can lead to unnecessary argument can cause people to have negative attitudes towards another person

1.2.3.2 Describe the process of filtering to control access to controversial contents.

Internet filtering is a process that prevents or blocks access to certain materials on the Internet.

It is a process of controlling the access to the internet by means of filtering software. It is used to prevent children from accessing inappropriate material and to keep employees productive on the Internet.

The current preferred method of choice to limit access on the Internet is to filter content either by: keyword blocking site blocking web rating systems

These methods require software to be installed at a client of server level.