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A virtual private network (VPN) allows for secure and usually encrypted connections over an insecure network (like the Internet), as shown in Figure 1.15. Usually, a VPN connection is set up between a customer-owned device deployment and the cloud. VPNs are appropriate for applications that do not need anywhere, anytime access. Organizations often use VPNs to connect cloud resources to offices and data centers.

FIGURE 1.15 Remote VPN access to a data center