Even though the Virtual Private Network (VPN) concept implies security most of the time, unsecured VPNs also exist. Frame Relay is an example in this regard because it provides private communications between two locations but it might not have any security features on top of it. Whether you should add security to the VPN connection depends on the specific requirements for that connection.
VPN troubleshooting is difficult to manage because of the lack of visibility in the service provider infrastructure. The service provider is usually seen as a cloud that aggregates all the network location connections. When engaging in VPN . . .
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