NS0-157 · Question #163
Which of the following is a feature of NFS 4.1?
The correct answer is B. Clients can re-acquire a delegation without re-opening a file. NFSv4.1 allows clients to re-acquire a delegation on a file without re-opening it, improving stateful session efficiency over prior NFS versions.
Question
Which of the following is a feature of NFS 4.1?
Options
- AACLs are not used
- BClients can re-acquire a delegation without re-opening a file
- CSymbolic links are not support
- DTraffic can occur over Fibre Channel
- EIt is stateless
How the community answered
(22 responses)- B91% (20)
- C5% (1)
- D5% (1)
Why each option
NFSv4.1 allows clients to re-acquire a delegation on a file without re-opening it, improving stateful session efficiency over prior NFS versions.
NFSv4.1 fully supports ACLs (Access Control Lists) as a mandatory part of the protocol specification, making this statement incorrect.
In NFSv4.1, the delegation reclaim mechanism lets a client re-acquire a previously held delegation without issuing a new OPEN operation on the file, reducing round trips and improving performance. This is an enhancement to the stateful delegation model first introduced in NFSv4.0.
NFSv4.1 supports symbolic links; they are a standard file system object type supported across all NFS versions.
NFS is an IP-based protocol that runs over TCP/UDP, not Fibre Channel, which is a storage networking transport for block-level protocols like FCP.
NFSv4.1 is a stateful protocol that maintains server-side state for locks and delegations; statelessness was a characteristic of NFSv2 and NFSv3.
Concept tested: NFSv4.1 delegation reclaim and stateful protocol features
Source: https://datatracker.ietf.org/doc/html/rfc5661
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