WAN Security is a fundamental requirement for connections between corporate offices and Cloud services. VPN technology can address this but introduces overheads and has a significant impact on performance, especially over cellular, Wi-Fi and international links. In addition the maintenance and administration of such a service can be very demanding both technically and financially.
As public Cloud services become more prevalent, VPN technology is no longer appropriate therefore resulting in a higher reliance on application level security. Compounding this is the increasing demand for more bandwidth and performance.
Access to Private and Secure Cloud services can no longer be assumed to be from specific locations with fixed IP addresses; users will be mobile and connections will be made from public Wi-Fi at hotels and airports, or using international cellular services.