Assume all endpoints are hostile
You don't control the endpoint devices that access your network and it's not worth your effort to try and secure them.
Between laptops used by contractors and employees accessing corporate emails on their personal devices, you must always assume your endpoints are compromised.
This e-guide teaches you how to implement layered security within the infrastructure you control. Discover how to put strict controls on highly sensitive data and less stringent controls on data that's not so important with network segmentation. You can't entirely eliminate the risk of a breach, but you can make it harder on the attackers.