One of the key features of L2VPN is its ability to provide which of the following?

The ability of L2VPN (Layer 2 Virtual Private Network) to provide traffic segregation for security is a fundamental feature. This segregation ensures that different customers' traffic is isolated from one another within the same physical network infrastructure. By encapsulating customer traffic and maintaining separate data streams, L2VPN enhances security by minimizing the risk of unauthorized access to sensitive information. This is particularly important in multi-tenant scenarios, where multiple customers share the same network resources.

In contrast, the other options do not accurately reflect the primary functionalities of L2VPN. Public access to all customers would compromise privacy and security, as it would allow any user to intersect with another's data. Automatic failover relates more to network reliability and redundancy, focusing on maintaining service continuity rather than the segregation of data. Data compression, while beneficial for bandwidth optimization, is not a primary feature of L2VPN, which is more concerned with the transport of frames between endpoints than with reducing the size of the payload.