What Is the Internet?

What is the Internet, exactly? To some of us, the Internet is where we stay in touch with friends, get the news, shop, and play games. To some others, the Internet can mean their local broadband providers, or the underground wires and fiber-optic cables that carry data back and forth across cities and oceans. Who is right?

A helpful place to start is near the Very Beginning: 1974. That was the year that a few smart computer researchers invented something What is the Internet? or, "You Say Tomato, I Say TCP/IP" Thing called the Internet Protocol Suite, or TCP/IP for short. TCP/IP created a set of rules that allowed computers to "talk" to each other and send information back and forth.

1. I can access my data from anywhere. In the traditional world of desktop applications, data is usually stored on my computer's hard drive

2. Which version of YouTube am I using today? What about tomorrow? The answer: Always the latest. Web apps update themselves automatically, so there's always just one version: the latest version, with all the newest features and improvements.

3. It works on every device with a web browser. In traditional computing, some programs work only on particular systems or devices. For instance, many programs written for a PC won't work on a Mac. Keeping up with all the right software can be time-consuming and costly.

Cloud Computing

Modern computing in the age of the Internet is quite a strange, remarkable thing. As you sit hunched over your laptop at home watching a YouTube video or using a search engine, you’re actually plugging into the collective power of thousands of computers that serve all this information to you from far-away rooms distributed around the world. It’s almost like having a massive supercomputer at your beck and call, thanks to the Internet.

This phenomenon is what we typically refer to as cloud computing. We now read the news, listen to music, shop, watch TV shows and store our files on the web. Some of us live in cities in which nearly every museum, bank, and government office has a website. The end result? We spend less time in lines or on the phone, as these websites allow us to do things like pay bills and make reservations. The movement of many of our daily tasks online enables us to live more fully in the real world.

Web Apps

App is shorthand for an application. Applications are also called programs or software. Traditionally, they’ve been designed to do broad, intensive tasks like accounting or word processing. In the online world of web browsers and smart phones, apps are usually nimbler programs focused on a single task. Web apps, in particular, run these tasks inside the web browser and often provide a rich, interactive experience.

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HTML,JavaScript,CSS and More

Web pages are written in HTML, the web programming language that tells web browsers how to structure and present content on a web page. In other words, HTML provides the basic building blocks for the web. And for a long time, those building blocks were pretty simple and static: lines of text, links and images. Today, we expect to be able to do things like play online chess or seamlessly scroll around a map of our neighborhood, without waiting for the entire page to reload for every chess move or every map scroll.

The idea of such dynamic web pages began with the invention of the scripting language JavaScript. JavaScript support in major web browsers meant that web pages could incorporate more meaningful real-time interactions. For example, if you’ve filled out an online form and hit the “submit” button, the web page can use JavaScript to check your entries in real-time and alert you almost instantly if you had filled out the form incorrectly.

I can access my data from anywhere. In the traditional world of desktop applications, data is usually stored on my computer's hard drive. If I'm on vacation and leave my computer at home, I can't access my email, photos, or any of my data when I need it. In the new world of web apps, my email and all my data are stored online on the web. I can get to it on a web browser from any computer that's connected to the Internet.
I'll always get the latest version of any app. Which version of YouTube am I using today? What about tomorrow? The answer: Always the latest. Web apps update themselves automatically, so there's always just one version: the latest version, with all the newest features and improvements. No need to manually upgrade to a new version every time. And I don't have to go through a lengthy install process to use my web apps.
It works on every device with a web browser. In traditional computing, some programs work only on particular systems or devices. For instance, many programs written for a PC won't work on a Mac. Keeping up with all the right software can be time-consuming and costly. In contrast, the web is an open platform. Anyone can reach it from a browser on any web-connected device, regardless of whether it's a desktop computer, laptop, or mobile phone. That means I can use my favorite web apps even if I'm using my friend's laptop or a computer at an Internet cafe.

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Packets

Chunks of information.

Bandwidth

The flow of information.

Synchronization

Making things work together.

Path

A source of information

Open source

Available to any one

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