Some servers are in operation only certain hours of the day or seasons of the year. The point to remember is that you should not give up on an address because you do not make a connection the first time. Try it again later. If you happen to enter a URL that has been changed, Web site administrators will often provide you with a new address for that particular document or home page. With your browser you can search through the ever-growing treasure trove of information on the Web.
Web browsers are flexible and powerful tools.
Gopher sites consist of interconnected menus that contain mostly text files. Text files do not include the images, sound files, or video that you may find at Web sites. But don't ignore Gopher sites. There are more than 25,000 of them in operation today, and they still contain a great deal of information that may not be available on the Web. Users visiting FTP sites are looking for specific files to download to their machines.