Is Mobile VPN with SSL the only VPN type that requires an application to be installed on all client devices?

Mobile VPN with SSL indeed requires an application to be installed on client devices because it is designed to provide secure access to resources through a browser interface and operates differently compared to other VPN types. The application facilitates the establishment of the VPN connection, manages user authentication, and ensures that the required security protocols are correctly applied.

This unique requirement for client-side application installation distinguishes Mobile VPN with SSL from other VPN types, such as IPsec VPNs, which can sometimes operate without dedicated client applications, allowing for connectivity through built-in operating system features or hardware that supports the necessary protocols directly. Thus, the statement that Mobile VPN with SSL is the only type requiring an installed application is accurate, underlining the specific nature of this VPN solution in terms of how it functions and its user experience.