What allows for scalable secure remote access by managing multiple VPN connections?

The VPN concentrator is specifically designed to manage multiple VPN connections efficiently, making it the best choice for scalable secure remote access. It facilitates the establishment of numerous VPN tunnels, which enables organizations to connect a large number of remote users or branch offices to a secure network. The concentrator handles the encryption and decryption of the data being sent over the VPN, ensuring that the traffic remains secure, and it can also manage user authentication and authorization.

The ability of a VPN concentrator to scale is a critical feature, particularly for enterprises that need to support various users simultaneously without compromising performance or security. This scalable architecture allows organizations to adapt to growing demands for remote access, making it a vital component in secure networking solutions.

In contrast, other options like firewalls primarily focus on controlling access to the network rather than managing VPN connections specifically. Load balancers distribute traffic across multiple servers but do not inherently provide VPN capabilities. Proxy servers act as intermediaries for requests from clients seeking resources from other servers, but they do not facilitate the establishment of secure VPN connections in the same manner. Therefore, the VPN concentrator stands out as the appropriate choice for the scenario described.