The days of network perimeter security are long gone. With corporate boundaries vanishing, the real battle to protect the network has moved to the realm of identity and access management (IAM).
Network perimeter security has lost importance because organizations have moved to the cloud and are rapidly adding apps and services to support their employees and customers in an always-connected world.
While cloud-based environments have turned businesses into more agile and efficient organizations, they have also exposed them to considerable risk.

Read more at – American Security Today : What Are Best Identity & Access Mgmt Tools Currently Available?