Tethered caching ensures mobile devices only install OS updates or apps when they are tethered to a computer. When you download cacheable content from the internet on a mobile device that is connected to a computer, a copy of the download is stored on the computer. The next time a mobile device connected to the computer tries to download the same content, it downloads directly from the computer via USB. Tethered caching speeds up downloads when you are setting up multiple devices. You can use Jamf School to configure which mobile devices use tethered caching as well as what content is downloaded using tethered caching.