You don't have to know any of that to use the Web, but you should be able to recognize a Web address because of its structure. If you already know the address for a particular site you can easily connect to it by entering the information into the browser you are using. However, many times you won't initially know the address of a place you want to visit. In this case, you have three options. First, you can guess.
Many Web sites have an address that is fairly intuitive.
For example, suppose you wanted to connect to Duke University. The second way you can find an address is by using one of the directories of URLs available on the Web. These directories usually have URLs sorted hierarchically by the content or purpose of each Web site. For example, let's suppose you were interested in learning more about the reptiles and amphibians of the Great Plains region. Within that subdirectory there will be directories that contain more specific information.