Internet surfing and security
- 1. INTERNET – SURFING & SECURITY
- 2. INTERNET • Internet is the largest network that links millions of computers with each other to share information across the world. • The biggest advantage of the internet is that you can access it from a computer or mobile device anywhere: at home, at office, at school or at the restaurant.
- 3. HISTORY OF INTERNET • ARPANET (Advanced Research Project Agency Network) was the first form of network. • It was set up by the US Department of Defense. • It was developed for sharing information in research and development in science and technology. • Used by government and scientists. • Was later used to spread education. • Eventually, grew bigger and led to present form of Internet.
- 4. ADVANTAGES OF THE INTERNET • Can get information on any topic. • Can send and receive e-mail messages very quickly. • Can play online games. • Can listen to music and watch movies
- 5. DISADVANTAGES OF THE INTERNET • All information you get on the internet may not be 100% accurate. • People spend more time on the internet surfing irrelevant websites which may affect their work or study. • Personal information can be misused on the internet.
- 6. REQUIREMENTS FOR THE INTERNET To use Internet, you need : A Computer or a Mobile Modem Internet connection ISP
- 7. MODEM • Is a short form for Modulator / Demodulator. • Is a device that receives data from the internet and sends data from your computer to the internet.
- 8. INTERNET CONNECTION • BROADBAND is a high speed internet connection. • With broadband access we use a computer, a digital modem and a broadband line.
- 9. INTERNET SERVICE PROVIDER • The internet connection is provided by different companies called ISP. • ISP allow you to use Internet on monthly charge. eg Airtel, tatasky, BSNL (Bharat Sanchar Nigam Limited)
- 10. SEARCH ENGINE • Search engine is a program that searches through the collection of Web pages for a particular information. • Popular search engines are Google, Bing & Yahoo.
- 11. WEB BROWSER • A Web browser or browser, is a software used to access the Internet • Examples: • Microsoft Internet Explorer • Mozilla Firefox • Google Chrome • Microsoft Edge
- 12. WWW – (World Wide Web): it contains millions of websites that provide information in the form of text, animation, pictures and videos. Webpage – it is an information displayed in the form of a page on the internet. Website – It is a collection of related web pages that provide information. Homepage – It is the first page that appears when we open a website. E-mail – Email stands for electronic mail. An email address defines the location of an individual’s mailbox on the internet.
- 13. COMPUTER VIRUS • A computer virus is a type of malicious code or program written to alter the way a computer operates and is designed to spread from one computer to another. • It is a program that secretly enters into the computer system in order to corrupt and destroy the data. • There are several ways by which a computer is infected with a virus. Some of these are: Internet, Junk mail, pendrive etc.
- 14. SYMPTOMS OF A COMPUTER VIRUS • Unusually slow performance. • Frequent crashes. • Unknown or unfamiliar programs that start up when you turn on your computer. • Mass emails being sent from your email account. • Changes to your homepage or passwords.
- 15. PROTECTING COMPUTER FROM VIRUSES: • Install an anti-virus software on your computer and update it from time to time. eg – Norton, Quickheal, Avira etc. • Never open an email from an unknown person. It may harm your system.