Uses of Internet Chapter Notes | Computer Science for Class 6 PDF Download

Introduction

• Internet is a collection of computers connected by network cables or through satellite links. Internet is a network of networks. It is also knows as Super Network. There are millions of computing devices that are connected to this network either permanently or for a short duration. These devices run network applications that communicate  hrough copper or fiber optic cables, radio or satellite transmission.
• The Internet connectivity is provided by Internet Service Providers (ISP) like BSNL, Airtel, Reliance, Aircel Vodafone etc.

 Advantages

Internet covers almost every aspect of life. Here, we will discuss some of the advantages of Internet.

• Internet allows you to communicate with the people sitting at remote locations using we site and applications like Facebook,Twitter,Yahoo,Google+,Flickr,Orkut etc.
• You can find any kind of information on any topic over the internet such as Technology, Health & Science, Social Studies, Geographical Information, Information Technology, Products etc.
• It also provides entertainment through various modes like online television, online games, songs, videos, social networking apps.
• Internet also allows us to use many services like Internet banking, matrimonial services, online shopping, online ticket booking, online bill payment, data sharing, e-mail etc.

Disadvantages

However, Internet has proved to be a powerful source of information in almost every field, yet there exists many disadvantages discussed below:

• There are always chances to loose personal information such as name, address, credit card number. Therefore, one should be very careful while sharing such information.
• Spamming corresponds to the unwanted e-mails in bulk. These e-mails serve no purpose and lead to block of entire system.
• Virus can easily be spread to the computers connected to internet.
• There are many pornographic sites that can be found, which indirectly affects your healthy and mental life.

Intranet: An intranet is a private network accessible only to an organization's staff. Intranet is system in which multiple PCs are connected to each other. PCs in intranet are not available to the world outside the intranet. Usually each company or organization has their own Intranet network and members of that company can access the computers in their intranet.

Similarities in Internet and Intranet

• Intranet uses the internet protocols such as TCP/IP and FTP.
• Intranet sites are accessible via web browser in similar way as websites in internet. But only members of Intranet network can access intranet hosted sites.
• In Intranet, own instant messengers can be used as similar to yahoo messenger/ Gtalk over the internet.

Differences in Internet and Intranet

• Internet is general to PCs all over the world whereas Intranet is specific to few PCs.
• Internet has wider access and provides a better access to websites to large population whereas Intranet is restricted.
• Internet is not as safe as Intranet as Intranet can be safely privatized as per the need.

Types of websites: There are various types of website available in Internet. Here we will discuss some basic types.

Web browser: A browser is a software application used to locate, retrieve and display content of Web pages, images, video and other files. The browser contacts the Web server and requests information and Web server sends the information back to the Web browser which displays the results on the computer. Example of Web browser are Mozilla firefox, Internet explorer, Google chrome ,epic etc.

Opening of Webpages and websites

• Opening a website is very easy process. First of all you must have a working internet connection on your computer.
• Search a browser which installed in your computer like Mozilla firefox, Internet explorer, Google chrome ,Epic, opera etc. double click on the icon of browser and type the name of website in address bar which you want to open. E.g www.kvsangathan.nic.in (See below).

Use of Search Engine

• Search engines are websites that sea rch the internet for you and give you a list of search results. Search engines can search for more than just written information. Depending on the search engine you’re using, you might also be able to search for other online content like images, video content, books and news, as well as products and services.
• You do not always have to know a website’s address in order to use the Internet. It is important to know how to search for information. One of the best methods to search is to use a search engine. You can use a search engine to help you find what you're looking for. You can also search for online maps and directions to help plan your travel from one place to another.
• Example: Google, Infoseek, Excite, Lycos, AltaVista etc.