To protect our data from theft and viruses we can take the following actions:-
(a) Use passwords to login to your computer
(b) Install Anti-virus and Firewall
(c) Encrypt Data
(d) Secure sites
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To protect our data from theft and viruses we can take the following actions:-
(a) Use passwords to login to your computer
(b) Install Anti-virus and Firewall
(c) Encrypt Data
(d) Secure sites
Threats are the ways in which personal information can be leaked from a computer without our knowing.
(a) Theft: Theft means stealing of information or hardware.
These maybe of two types:
(a) Physical: Where a person may steal your desktop computer or laptop.
(b) Identity: Where a hacker steals your personal information and assumes your identity. Using this false identity, the hacker can gain access to your account information or perform illegal activity.
(b) Virus: Viruses are computer programs that can damage the data and software programs or steal the information stored on a computer. Major types of viruses are Worms and Trojan horse.
Computer security and privacy deals with the measures used to prevent loss of data. Security break is leakage of information stored in a computer.
Personal information can be lost or leaked in two ways:
1. We are not careful in giving out personal information over the Internet. For example, we share our account details and password on unsecure sites.
2. A person gets unauthorized access to our computer. This can happen in the
Office, if we leave are computer without logging out.
Backing up data means to save the information present on your computer on another device, such as CD/DVD drives or hard disk. Data can recovered from here in case the computer stops working completely.
Computers can crash, humans can make mistakes and natural disasters, such as floods can happen. So, it is important for companies, hospitals, banks, etc., to keep their information safe — so that their business can continue to function smoothly and their customers do not face problems.
Folder is a location where a group of files can be stored. For example, we can create a folder where all the files for all the other documents can be stored.
To create a folder, do the following steps:-
(a) Choose a location where the folder has to be created for example ‘Desktop’.
(b) Right-click and then choose the ‘New Folder’.
(c) Type the name of the folder as ‘Demo’.
All information stored in a computer is kept in files. Different types of files store different types of information. Each file is given a file name and has a file name extension that identifies the file type. The file name and file name extension are separated by a period or a ‘dot’.
File Extensions:-
Paint = .bmp (bitmap images)
Notepad = .txt (text file)
Wordpad = .rtf (rich text file)
MS-Word = .doc or .docx (document)
Ms-Excel = .xls or .xlsx (spreadsheet)
Ms-Pawerpoint = .ppt or .pptx (presentation)
Ms-Database= .mdb or .db (database)
To start a computer, press the Power button on the CPU. This will start the operating system and display the desktop or the main screen on the monitor.
You can shut down the computer by clicking Systems button at the top right and then click Shut Down. When you click Shut down, the Operating System will close all the applications and turn off the computer.
A computer system consists of two main parts—
1 hardware
2 software.
The physical parts that we can see and touch are called hardware. It is the machinery of a computer. These are the keyboard, monitor, CPU, etc.
There is another important part i.e., the software. Though we cannot see it, it makes the hardware work the way we want.
ICT stands for Information and Communication Technology. ICT refers to all the methods, tools, Concepts related to storing, recording and sending digital information. ICT devices are tablets, smartphones and laptops. ICT skills help us to communicate, run our business and stay connected with our family and friends.