A data center engineer is deploying NFS datastores for a VMware cluster on a Nexus-based storage network. The storage team requires that file locking and session state survive brief network interruptions so that clients can reclaim locks after a server or path failure, and they also want to consolidate access under a single well-known TCP port to simplify firewall rules on the Nexus edge. Which NFS version and characteristic should the engineer select to meet these requirements?