No one person invented the Internet as we know it today. However, there are a number of significant individuals who contributed to the creation of one of the most useful tools known to humans.
Packet switching is essential to the Internet. This concept refers to the transfer of information online and relies solely on such a theory. Imagine a system that requires you to have an individual phone line and modem for each person that you want to talk to. This makes things a lot more expensive. Packet switching allows multiple users to connect using a single physical connection rather than by multiple connections. Leonard Kleinrock understood and applied this concept in the effort to replace the old circuit switching process.
Long Distance Networking
Larry G. Roberts is the creator of the first long-distance computer network. This is vital as the Internet relies on the long-distance networks of computers in the distribution of data. He also initiated the Advanced Research Projects Agency (ARPANET), which later grew into the modern Internet.
Transmission Control Protocol
Data is not just transported from one place to another. As it travels it, consequently, creates traffic. Bob Kahn and Vin Cerf saw this problem and came up with the Transmission Control Protocol (TCP). This is the closest thing to modern Internet technology. This is because TCP controls the traffic of data and manages connections worldwide. In this light, these two geniuses could have produced the Internet by themselves; however, they did not create the other important components of modern Internet.
Spanning Tree Algorithm
Any fine connection requires an excellent bridge in order to keep the data flow working to a maximum. Radia Perlaman built the spanning tree algorithm to create that bridge between separate networks. This allowed a good bridging solution as the absence of such would render networks of this scale impractical.
The Internet you Know
The popular and well-liked application that we all know of was created by Tim Berners-Lee and Robert Cailliau in an effort to make the Internet available to the general public. They developed a user-friendly interface and a system to allow easy access to various types of information.
The Internet was not formed by one person only. It took several decades and the effort of more than a few dedicated people to build the device that now fuels a great deal of the processes of the world these days.