• Request - This is each time someone asks to see any part of your site. To see your site, they will have to "request" a specific page or file.
• File - Any part of your site (an image, html page, pdf document, script, etc)
• Host - The individual computers that view your site. Each computer that views your site is treated as differently. Multiple users on one computer will be treated as one host.
• Data - Data is the contents of the files in your site. Anytime someone views a file, data is transferred and it will count towards your bandwidth usage.
• Referrer - A Referrer is the web site that linked to your site. It "referred" the visitor to your site.