INTERNET

     

      

           The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to serve several billion users worldwide.

   It is a connection, established between two or more computers to allow items to share data and resource with each other.

BROWSERS:

          A web browser (commonly referred to as a browser) is a software application for retrieving, presenting and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URI/URL) and may be a web page, image, video or other piece of content. Hyperlinks present in resources enable users easily to navigate their browsers to related resources.

    It is an application program, which enables the internet users to access requested by the user on www and loads it on the computer system. A browser is typically of the following two types:

Non-Graphical: It allows the users to browse only text-based web pages on the internet that do not contain any image, sound or video elements. For example Linux is a non-graphical browser that is mostly used by the users of UNIX operating system.

Graphical: It allows the users to browse multimedia web pages containing plain text, images, sounds, animations, videos, etc.

LIST OF BROWSERS:

There are more number of  browsers are available in market.The most popular browsers are,

1.  Google chrome

2.  Internet Explorer

3.  Mozilla Firefox

4.  Opera 

5.  Safari

SEARCH ENGINES:

         A web search engine is a software system that is designed to search for information on the World Wide Web. The search results are generally presented in a line of results often referred to as search engine results pages (SERPs).
    The information may be a specialist in web pages, images, information and other types of files. Some search engines also mine data available in databases or open directories.        

    

List of Search Engines:

1. Google

2. Yahoo!

3. bing

4. Ask

5. GoodSearch

GETTING CONNECTED:

            Before using internet, let us see what we need to get connected to the Internet. We need-

(i)  A computer

(ii) A telephone line

(iii)A modem

(iv)An Internet Service Provider (ISP)

MODEM:

    A MODEM stands for MOdulator and DEModulator. Modem converts the computer's digital data into Analog waves and vice-versa. This analog wave is transmitted through the telephone lines.
   A Modem is a device converts digital data to telephone line compatible signals and vice- versa. Telephone lines are used to transfer the data in the form of analog waves. But in the computer all the data are stored in digital form.

Internet Service Provider :(ISP)

       You can access the Internet using a direct connection. But such a 24 hours, dedicated connection to the Internet is very expensive. It is much cheaper to use an ISP. 
       These companies that allow you to use their Internet connection for a price. For this connection, you have to register with an ISP and  get an Internet Account.

     

   When you register the ISP gives you the following:

·       User name: A unique name that identifies you.

·   Password: A secret code that prevents other people from using your account.

·      An E-mail Address: A unique address that you can use to send and receive e-mails.create an e-mail Id 

·    Access telephone numbers: You can use these numbers to connect to the Service provider.

    

HOW TO SPEED UP A SLOW INTERNET CONNECTION:

1.     Optimize your browser

2.     Optimize your modem/router

3.     Optimize your Internet service package

4.     Optimize your computer

       A slow internet connection wastes time, turns streamed videos into bad slideshows, and puts your computer in real danger of being lobbed out the window. Here are some steps you can take to fix or improve your connection.

1.Optimize your Browser:

Switch to a different browser: Some people use Internet Explorer, which, while a decent browser, does use a lot of resources. 

Moreover, as web pages become more advanced, the number of processes necessary to load them grows, meaning you’re usually better off with a browser that can be customized to cut back on ads and other non-essentials,

•             Firefox has many extensions that allow for the ability to block elements such as JavaScript, advertisements, Flash, and other things until you enable them. One critical add-on is Adblock Plus, which virtually eliminates ads from your surfing experience and speeds up load time considerably. You may also want to try the add-on Fasterfox Lite, which will give Firefox enhanced speed options.
•        Google Chrome, while new, uses very little memory and can also be good for sites that have a lot of JavaScript and Flash. You may also want to try the Fastest Chrome add-on.
•         Opera has compression technology, (Opera turbo) specially designed for slow network connections. This has proved very effective for many.

2.Optimize your modem/router:

           Remove unwanted add-ons, extensions, and plugins: Though many plugins and add-ons can make your surfing experience more efficient, others make it difficult to perform instant page loads. (Non-essentials like themes, skins, and gizmos you have long since grown bored with are prime targets.) Try disabling these unnecessary plug-ins and add-ons to gain better browsing and downloading speed.

•    To turn off add-ons on Firefox, Go to Tools > Add-ons and disable both unwanted add-ons and plugins. Restart Firefox to put changes into effect.
•    To turn off add-ons on Google Chrome, Go to Customize > Tools > Extensions and disable unwanted plugins. Restart Chrome to put changes into effect.
•   To turn off Internet Explorer add-ons, Go to Tools > Manage Add-ons and disable unwanted add-ons. Restart IE to put changes into effect.

3. Optimize your Internet Service Package:

Close unused tabs: Even if you aren’t looking at them, many pages automatically refresh themselves every few minutes or seconds to keep you in sync (news pages, Facebook, and Twitter are excellent examples). Close these when you’re not using them so they don’t eat up your bandwidth.

4.Optimize your computer:

       Allow (some) cookies and caching: While allowing cookies and caching means that parts of your browsing history or even your personal information will be tracked and/or stored, a lot of this is completely harmless and, in fact, allows pages to load more quickly.

      Note that different browsers will allow different levels of customization as far as cookies and caching are concerned. To change these settings:

•    In Firefox, go to Tools > Options > Privacy.
•    In Internet Explorer, go to Tools (may look like a cog) > Internet Options >Browsing History and make sure Delete browsing history on exit is not checked. For more controlled deletion, go to Delete… and make sure Preserve favorite website data is checked.
•       In Chrome, go to Tools (may look like a wrench) > Settings, scroll down, then go to Show Advanced Settings > Privacy > Content Settings.