90% of your network traffic is internal (termed East-West traffic) and may never touch a firewall, yet most security concentrates on the perimeter inbound and outbound traffic (termed North-South). Should an exploit manage to leverage the weakest link in your perimeter and get inside then it then ...

UPDATE: Despite a new agreement reached in February 2016 (https://europa.eu/rapid/press-release_IP-16-216_en.htm) the subsequent vote to leave the EU in the June referendum will still require decisions to be made on where your data actually resides. Many major cloud companies will probably open UK ...