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This lesson focuses on de-perimeterization. De-perimeterization is the concept of having to work about attackers across the Internet or people connecting to a company server from home. Companies are no longer just one office that needs to be secure; it's now a very far reaching device. Today, companies need to deal with the following issues and how they relate to security:
Corporate IT versus BYOT (bring your own technology, i.e. using your own personal iPad as a work device)
Android and iOs
Laptop and traditional OSes
Devices need to be secure via network access control (NAC), companies can check to make sure a device is safe by making sure it has up to date virus protection and a secure firework before they can connect to a corporate network.