A system that sits between the device and the internet, intercepting traffic and blocking connections to known-bad destinations (usually via DNS or a proxy). Most "kosher phone" plans sold today are built on content filters. Filters work until the user bypasses them — by installing a VPN, changing DNS, or installing a new browser. Unlike content filters, Supervised Mode + MDM doesn't filter traffic — it removes the bypass surfaces entirely.
Related terms
This term is connected to the broader supervised iPhone ecosystem. See the [full glossary](/glossary/) or return to [how it works](/how-it-works) for context.