The speeds advertised by ISPs often cannot be achieved in practice. These speeds can only be achieved under optimum conditions. The following factors determine your ultimate Internet speeds:

• The actual speed offered by your ISP
• The quality of your modem, router (or modem-router)
• The quality of the receiving devices, such as your PC, notebook or tablet
• The files you wish to download
• Site traffic; websites with heavy traffic will affect your speed