What feature does NFS 4.1 offer to servers that support session trunking?

NFS 4.1 introduces a feature known as session trunking, which allows multiple TCP connections to be established between the NFS client and server. This capability enhances the performance and reliability of NFS operations by allowing multiple requests to be sent over different connections concurrently. With session trunking, the NFS server can take advantage of native multipathing, which means it can effectively utilize multiple network paths to improve data transfer rates and provide redundancy in case one of the paths fails.

Native multipathing helps in distributing the workloads across multiple paths, thereby optimizing network resource utilization. Additionally, if one path encounters issues, the other paths can continue to function, thus improving fault tolerance. This is particularly beneficial in environments where high availability and performance are critical.

The other features listed, while they may relate to NFS functionalities, do not accurately describe the outcome of session trunking in the context of NFS 4.1. Load balancing typically pertains to distributing workloads across multiple systems rather than directly supported connections, session persistence focuses on maintaining a consistent session state rather than path utilization and redundancy, and data encryption, while important for security, is a separate concern from the session and path management features provided by NFS 4.1.