Getting proper Wi-Fi capacity
You should consider the expected usage pattern of the Apple devices as part of your Wi-Fi network design.
Most modern, enterprise-class access points (APs) can handle up to 50 Wi-Fi clients, or even more (though the user experience would likely be disappointing if that many devices were using a single 802.11n AP). The experience for each user depends on the available wireless bandwidth on the channel the device is using, and on the number of devices sharing that bandwidth. As more devices use the same channel, the relative network speed for those devices decreases.
For example, consider a school with 1000 students and 30 teachers in a two-story building. Every student has an iPad, and every teacher has a MacBook and an iPad. Each classroom holds approximately 35 students, and classrooms are next to each other. Throughout the day, students conduct research on the Internet, watch educational videos, and copy files to and from a file server on the local area network (LAN).
This scenario would require a fairly complex Wi-Fi design. Accommodating the large number of devices in each classroom might required one AP per classroom. For the common areas, the number of APs should be driven by the density of Wi-Fi devices in those spaces.
Important: Perform a preinstallation site survey to determine the exact number of APs needed and where those APs should be mounted. A site survey should also determine the proper power settings for each AP radio. After installation of the Wi-Fi network is complete, perform a postinstallation site survey to confirm the Wi-Fi environment. For example, for a network designed to support a large number of people in a building, it’s best to validate the design with people in the building because people absorb RF signals. If classroom doors will be closed when the network is in use, the door should be closed when you validate the design.
Hardware and multicast
Access Points (APs) and other hardware devoted to the Wi-Fi infrastructure should have the same capacity and enabled features to avoid an inconsistent Wi-Fi experience for users. For example, an 802.11ac network should be configured consistently across all APs instead of having some APs configured for 802.11n on the same network name. The Bonjour zero-configuration networking architecture provides support for publishing and discovering services on a local area or wide area network. Bonjour should be enabled on your network whenever access to Apple apps and services such as Classroom, AirPlay, and AirPrint are desired.