Basics of Internet

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Basics of Internet

The Internet is a huge network of computers around the world. Using the Internet you can get any information that is stored in a web page on the World Wide Web. You can do all this by connecting your computer to the Internet. If your computer is connected to the Internet, you say that your computer is online. With the help of the Internet, you can gather a lot of knowledge which is available on it. The knowledge is stored in a big library/ storehouse, called the World Wide Web (WWW) or the Web. It is a collection of different websites that you can view if you are connected to the Internet. You can also use these websites to buy something, watch movies, read books, learn new skills, educate yourself, find the best colleges to study further, etc.

 

Uses of the Internet

 

Search information: You can get the latest information about anything that is uploaded on the web, whether it is result, news about an earthquake, a cricket match or the election details. Shopping: You can buy and sell products, such as books and electronic goods over the Internet. You can also pay for these products via digital modes of payments, such as wallets, plastic cardsor through e-banking
Entertainment: You can listen to music, play games, watch movies or share pictures. Online booking: You can book movie tickets, hotels, bus/train/ plane tickets, etc., online.
E-mail and chatting: You can talk or send messages to people all around the world quickly and easily. The messages you send over the Internet can reach any part of the world in just a few seconds. For example, Gmail and Outlook. Online learning: There are a number of courses available online─some are free while others are not. You can do a course on a topic you like or want to know more about.
Social networking: You can share your interests, knowledge and stories with your family and friends around the world. For example, Facebook and Twitter. Online banking: You can do banking operations, like checking details of your bank account or transferring money from one account to another through mobile banking/NEFT/RTGS.

 

Types of connections 

 

(a) Wired connections: When our computer is connected to the Internet using a wire, it is called a wired connection (as shown in Figure 3.38). We use Ethernet cables (cables used for connecting to the Internet) to connect to the modem which connects to the ISP using a phone line. 

(b) Wireless connection: You can also connect your computer to the Internet using wireless technology as shown in Figure 3.38A. Laptops need a wireless Internet card to connect to a modem using any cables. 

 

Bandwidth 

 

Bandwidth is the amount of data that can be transmitted over a network in a certain amount of time. To understand Figure 3.37: Connecting to the Internet Figure 3.38: Wired connection bandwidth, Let us take the example of a pipe, the amount of water flowing through a pipe depends on its thickness. Similarly, the amount of data that your network can receive or send depends on its bandwidth. In case of digital devices, the bandwidth is usually expressed in bits per second (bps) or bytes per second and in case of analog devices, the bandwidth is expressed in cycles per second, or Hertz (Hz). Data transfer speed over the networks (including the internet) is calculated in terms of bits per second. 

1 Kbps (kilo bits per second) = 1000 bits per second 1 Mbps (megabits per second) = 1000 kilo bits per second 1 Gbps (giga bits per second) = 1,000 megabits per second 

 

Internet browser 

 

To see the information on the various websites, you need an Internet Browser. An Internet Browser is an application or a software program on your computer or laptop which helps you visit the various websites. Some examples of browsers are Google Chrome, Mozilla Firefox and Internet Explorer.

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