Which of the following VPN types provides secure remote access to the network resources through a web portal?

A proxy server acts as an intermediary for requests from clients, but "Proxy VPN" is not a standard VPN type that provides web portal access.

A clientless VPN, typically implemented as an SSL VPN, allows users to securely access internal network resources via a standard web browser and a web portal, without requiring the installation of dedicated VPN client software.

A site-to-site VPN connects two distinct networks together (e.g., branch office to headquarters), rather than providing individual remote user access through a web portal.

Direct Connect typically refers to a dedicated, private network connection established between an on-premises data center and a cloud provider, not a VPN type for remote user access via a web portal.