What function does a VPN (Virtual Private Network) concentrator serve?

The function of a VPN (Virtual Private Network) concentrator is to encrypt and decrypt data packets that traverse the VPN. This ensures that the data sent between a user's device and the remote server is secure from eavesdropping and tampering.

By creating a secure tunnel through which the data can flow, a VPN concentrator helps protect sensitive information, such as personal details and corporate data, from unauthorized access as it travels over the internet. This encryption process is vital for maintaining privacy and security in various communication scenarios, especially when using public networks.

The other options do not accurately describe the specific role of a VPN concentrator. Distributing network traffic evenly relates to load balancing, managing local area networks focuses on internal network administration, and acting as a physical switch pertains to connecting devices in a local network rather than encrypting data.