The applications that place most pressure on an organisation's wireless network, according to research from network solutions provider, Aruba Networks:
1 - Video Conferencing
GoToMeeting, Google+ Hangout, WebEx, Lync, Skype
The more users on the video conference, the larger screen size they use on their mobile device, and the more Wi-Fi bandwidth is required. For example, Skype requires 4Mbps download speed for 5-way conferencing, and WebEx bandwidth requirement more than doubles if a laptop is used vs. an iPad to join the conference.
2 - Cloud Storage
Dropbox, Box, iCloud
These are designed to capture as much Wi-Fi bandwidth as they can, unless default settings are modified by the end user - which rarely happens.
3 - AirPlay, AirPrint
IT will typically have to disable these to save the wireless network from collapse. On top of this, each screen mirror requires about ~1Mbps per iPad, iPhone, MacBook.
4 - Audio & Video streaming
Spotify, Pandora, YouTube, Vimeo, Netflix
These are the #1 or #2 bandwidth consumers in higher education, with another contender being video streaming. It is becoming more than common to have users stream audio at work. Each audio stream consumes ~500Kbps, and each video stream consumes 1-2Mbps over the air. This requires high levels of Wi-Fi bandwidth, especially if the mobile devices are not using top 802.11n rates/speeds.
5 - Virtual desktop
For businesses that are built around the usage of the virtual desktop, tablets require 1.5Mbps of constant data rate for each device. In a high density environment, this presents a huge challenge for any Wi-Fi network.