Internet VPN is the most preferred VPN option and is usually referred to when talking about VPN. The devices make a secure connection to the VPN server, after which the server connects to the Internet.
An IP-VPN, unlike an Internet VPN, is a closed, secure connection between the device and the mobile network. This connection is made without using the Internet. The device is connected to the mobile network via the private APN and the data traffic is delivered to the server through the IP VPN and a private network.
With a private APN/VPN it becomes possible to assign fixed IP addresses to SIM cards. Unlike the normal dynamic IP addresses (which change continuously) a fixed IP address always stays the same. This makes it possible to access the device remotely or to register it in software programmes.