Anonymous FTP only allows you to copy files. You cannot rename, delete, or otherwise change the originals. When a user logs into an FTP site as an anonymous user a site will normally ask for your E-mail address for a password. To access these files you need what is called an FTP client. Files on FTP servers are often compressed.
Compression decreases file size.
This enables more files to be stored on the server and makes file transfer times shorter as your modem does not have to do all the work. In order to use a compressed file it needs to be decompressed using appropriate software suck as pkzip , rar, and arj are just a few of the most common. It is a good idea to have current virus checking software on the computer before files are downloaded to it. The above steps will vary in practice, depending on the client program being used and the type of Internet connection. Files on FTP servers are often compressed.