350-601 Storage Network Practice Question
An NFS client is unable to write to a mounted export. The client can read files. What is the most likely cause?
⚠ Common exam trap
Cisco often tests the distinction between server-side export permissions and client-side mount options, trapping candidates who assume that a 'rw' mount option guarantees write capability without considering the server's export configuration.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Export permissions are read-only for the client
The NFS export permissions are configured on the NFS server using the /etc/exports file. If the export is set to 'ro' (read-only) for the client's IP or subnet, the client can read files but any write attempt will be denied at the server level, regardless of the client's mount options. This is the most direct cause of a client being able to read but not write.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Export permissions are read-only for the client
Why this is correct
Correct: Read-only export allows reads but denies writes.
- ✗
Network latency causing timeouts
Why it's wrong here
Incorrect: Timeouts would affect both read and write operations.
- ✗
Incorrect mount options (e.g., ro instead of rw)
Why it's wrong here
Incorrect: Mount options affect mount, not subsequent writes.
- ✗
NFS version mismatch
Why it's wrong here
Incorrect: Version mismatch may prevent mounting entirely, not just writes.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.