Network equipment maker Cisco Systems Inc said it expects global Internet traffic to more than quadruple by 2014 as more people use the Internet to watch videos and chat with friends online.
Cisco forecast Internet traffic to rise to 767 exabytes a year by 2014, with most of the growth coming from online video.
That forecast is also 100 exabytes higher than the level it projected last year for 2013.
One exabyte equals 1 billion gigabytes.
Cisco said watching all the video crossing over the global network in 2014 would take around 72 million years.
The company said video, including video-on-demand on cable and Internet services, will account for around 91 percent of global consumer online traffic by 2014.