The communication between the two routers starts only after an authentication is validated between the two. Types of VPN protocols. The above two VPN types are based on different VPN security protocols. Each of these VPN protocols offer different features and levels of security, and are explained below: 1. Internet Protocol Security or IPSec:

If the native VPN client login was combined with something like Microsoft's Phonefactor Azure Multifactor authentication or Duosecurity which both use RADIUS, it would allow multifactor authentication via automated phone call, SMS or a smartphone app and the end user Chromebook device doesn't need to "support" it directly since this Two basic VPN types and and six types of VPN Protocols Since Site-to-site VPN is predicated on Router-to-Router communication, during this VPN type, one router functions as a VPN Client and different router as a VPN Server. The connection between the 2 routers starts only after authentication is validated between the 2. Choosing a remote access authentication scheme - TechRepublic

The PPTP implementation that ships with the Microsoft Windows product families implements various levels of authentication and encryption natively as standard features of the Windows PPTP stack. The intended use of this protocol is to provide security levels and remote access levels comparable with typical VPN products.

We explain what a VPN protocol is and what it does. We also compare the strengths and … VPN on Windows 10: Selected Authentication protocol not

Point-to-Point Tunneling Protocol - Wikipedia

What is IKEv2 VPN Protocol | Available in KeepSolid VPN Internet Key Exchange or IKE is an IPSec based tunnelling protocol that provides a secure VPN communication channel, and defines automatic means of negotiation and authentication for IPSec security associations in a protected manner. Encryption and Security Protocols in a VPN | HowStuffWorks May 24, 2019 VPN protocols and which is the best to use | TechRadar