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Many organizations have relied on a traditional network security model centered on virtual private networks, or VPNs. But in today’s decentralized climate, that model is becoming increasingly hard to manage. Not everybody accessing your network needs to have the same level of access permissions. VPNs lack flexibility you need in today's IT environments. They don’t transition well to cloud and usually have limited capability to support [secure access to cloud workloads] and IaaS (e.g. cloud)