"...there's no silver bullet."

This is undeniably true of so much in life...including cyberattacks. Two excellent reminders in this article:
#1 Bulk up your detection methods
#2 Segment your environment, wherever possible

These will reduce the size and scope of an attack's impact and enable faster and more successful response. At Trestle Networks, we work 24/7 to protect our Managed WiFi retail/restaurant clients through PCI DSS compliance and 24/7 WIPS (WiFi intrusion prevention system). 

http://www.computerworld.com/article/3193654/security/face-it-enterprise-cyberattacks-are-going-to-happen.html