In this topic, we’re going to look at how the Internet works. Specifically, how that stream of characters you punch into your browser’s address bar, like “youtube.com”, return this very webpage. Just to clarify we’re talking in a broader sense about that massive network of networks connecting millions of computers together, not just the World Wide Web, which is a portion of the Internet, and our next topic. This topic focuses on how data is passed back and forth, how a domain name is registered by the Domain Name System, and of course how the data requested or sent gets to the right person in little packets following standard Internet Protocol, or IP.
We’ll also look at two different approaches to transferring this data: Transmission Control Protocol, or TCP, when we need to be certain no information is lost, and User Datagram Protocol, or UDP, for those time sensitive applications – because nobody wants an email with missing text, but they also don’t want to get lag-fragged in their favorite first person shooter.
Immersive Lab: The Internet
The Internet has made the world such a wonderful place. We can now access people, business and information from across the globe at the drop of a hat. But do you really know how the Internet works or what it actually is? In this lab you will learn what the Internet is, how it works and why it’s so important.