What Is Internet ?

Internet is a connecting a computer to any other computer anywhere in the world via dedicated routers and servers. When two computers are connected over the Internet, they can send and receive all kinds of information such as text, graphics, voice, video and computer programs.

Now a days, Internet connects millions of people, and thousands of businesses, government, schools, universities and other organizations. The internet provides the network connections that links computer together. There are many ways that we can use these connections:

• View web pages on the WWW ( world wide web)
• Sending and receiving e-mail messages
• Communicating using voice (VOIP) and video ( video-conferencing)
• Playing multi-player games 
• Listening to streamed music or watching streamed video

No one owns Internet, although several organizations the world over collaborate in its functioning and development. The high-speed, fiber-optic cables through the bulk of the internet data travels are owned by telephone companies in their respective countries.

The internet grew out of the Advanced Research Projects Agency’s Wide Area Network ( then called ARPANET) established by the US department of defense in 1959 for collaboration in military research among business and government laboratories. Later universities and other US institutions connected to it. This resulted in ARPANET growing beyond everyone’s expectations and acquiring the name ‘Internet’.

The foundation of the internet began in 1969, when the US department of defense created ARPAnet, a project to allow military personnel to communicate with each other in an emergency. By 2018, the number of internet users worldwide reached 4.1 billion that is about one third of the world’s population. To store all of the information on the internet. In DVD or devices is almost impossible.

Internet, Intranet, Extranet

 Intranet

An intranet is the name given to a private network that provides similar services to the Internet: e-mail, messaging, web pages, etc. However, these services are only for the users of the intranet. They are private, not public. Businesses and other organizations often have intranets for use by their employees. Typical uses of an intranet would be:

• Viewing internal web pages (e.g. company calendars, etc)
• Internal e-mail and instant messaging between workers
• Sharing of internal documents

Internet

The internet is the world-wide network of computer accessible to anyone who knows their Internet protocol (IP) address or domain name. Most will have accessed a computer using their browser and the domain such a http://www.facebook.com.

Extranet 

An extranet is a private network that uses Internet technology and the public telecommunication system to securely share part of a business’s information or operations with suppliers, vendors, partners, customers, or other businesses. An external can be viewed as a part of a company’s intranet that is extended to users outside the company. An extranet requires security and privacy. These can include firewall server management, use of digital certificates or similar means of user authentication, encryption of messages, and the use of virtual networks (VPNs) that tunnel through the public network.

Internet services

Internet has been the most useful technology of the modern times, which helps us not only in our daily lives, but also our personal life’s. The internet helps us achieve this in several different ways. These are the common purpose of the use internet.

• Use a search engine to find information
• Send or read e-mail
• Search for a map
• Check the weather 
• Do any banking online
• Play online games 
• Make a phone call online, using a service such as Skype or Viber
• Send instant messages

How to connect internet

Before you can access the internet, there are three things that you need: internet service, a modem or connecting device and a web browser.

Internet services providers usually offer different levels of speed based on your needs. If you have a laptop with wireless connection, you can access the internet  at any place that offers a WI-FI  connection. Many restaurants, coffee shops, bookstores, hotels, and other businesses offer free WI-FI in public areas such as parks and downtown areas.