A VPN (Virtual Private Network) is a private data network that uses the public telecommunications infrastructure, maintaining the privacy of communication data through the use of security protocols, protecting the data that passes over the line public and making it impossible for third parties to access it.
When establishing a VPN connection, the computer behaves as if it were connected to the FCUL network, allowing access to resources available only to those within the faculty network (posting notes, accessing the network file service, connecting to FCUL jobs).
Please note that the "eduroam" wireless network for users with FCUL accounts is considered an internal network to FCUL, so you will not need to use the VPN to access FCUL's internal resources.