Fiber Internet can reach up to 2,000 Mbps or 2 GB, however, most fiber providers will offer top speeds of 1,000 Mbps or 1 GB. Fiber allows you to sustain extremely heavy Internet usage along with many advanced online activities. It should be noted that fiber Internet is continuing to improve and eventually you will see speeds dramatically increase as technology improves. The upload speed that fiber Internet offers sets it apart from cable and DSL upload speeds since the upload speeds for these technologies are much slower than the download speed. However, many more users will use a lot more download data than upload data, making the difference in speeds quite negligible.