Location and Plan

• While Verizon touts FiOS' 50Mbps downstream speed, they also warn that 50Mbps isn't available in all locations. Verizon's FiOS network is more extensive in certain locations to meet higher demand. The condition of the fiber optic wiring in your house and area also help control your bandwidth. When you sign up for FiOS, you select from a number of plans. As the connection speed gets higher, so too does the price. Your bandwidth is largely affected by the FiOS plan to which you subscribe.
  
  

Computer Configuration

• The fastest FiOS connection won't help you much if your computer isn't capable of handling the Internet speed for which you're paying. If you're using an older modem, router or Internet card, you may not be getting all you're paying for. While Verizon may be sending you a stellar Internet connection, your computer may not be fast enough to process the connection or the web pages you want view fast enough to keep up with your connection.
  
  

Congestion

• Unlike DSL Internet, Internet traffic and congestion may affect your FiOS connection. As with cable Internet connections, when there's heavy Internet traffic in your area, you may notice slower speeds. These peak hours usually coincide with evenings. Other computers on your network may also cause a speed decrease if they're processing resource heavy tasks like downloading large files, streaming a movie or playing an advanced online game.
  
  

Website Servers

• Even if you've got the top-of-the-line FiOS package and computer, your Internet speed may get slowed down due to the server of the website you're viewing. If all websites load slow, however, this probably isn't the issue. If you only notice a significant speed difference when viewing a few specific websites, it's likely slow speed from the server hosting the website. Test it for yourself by trying to load another web page and see if your connection is as slow.