If You are an administrator for the Contoso Corporation and You want to implement a new VPN server, and you are trying to determine the best VPN

If You are an administrator for the Contoso Corporation and You want to implement a new VPN server, and you are trying to determine the best VPN protocol and You have lots of users who work remotely from their home offices or who travel a lot. You still need to ensure that the system has an up-to-date antivirus program and the newest Windows updates. If a user gets disconnected, the client needs to be reconnected as quickly as possible. Which VPN protocol would you choose?