Perhaps the fastest growing and most diverse part of the network is at the edge. Compared with more controlled and limited aggregation points such as the WAN, the edge is where the sprawl is – a plethora of devices ranging from regular laptops to legacy devices with older authentication schemes, to BYOD devices and most recently, the rapidly growing number of IoT devices. Access is also complicated by segmentation needs leveraging VLANs/SSIDs and authentication based on user roles, devices, organization, or to provide an overlay network for VoIP, surveillance, or operation technologies.