The amount of data the companys network connected devices generate is around 20TB or more in a single day. A traditional perimeter defense will not necessary the attackers from stealing sensitive data. Organizations will need to start with the assumption that some adversary might be successful in their attempt to bypass the defenses. The traditional risk based approach will not single-handedly help in mitigating or tackling a data breach, it should be coupled with proper incident response plans and data loss prevention mechanisms. Companies planning to invest in cyber security must also focus on different approaches to tackle cyber events.”]
Source: http://securityaffairs.co/wordpress/34883/hacking/prevent-data-exfiltration.html