Exam NS0-521 topic 1 question 10 discussion

Actual exam question from Netapp's NS0-521

Question #: 10
Topic #: 1

A customer is using a new two-node NetApp All SAN Array (ASA) configuration with SnapMirror active sync. To verify if everything is set up correctly, the customer is looking at the number of paths in their ESXi hosts.
How many paths should the customer see?

A. 4 Active/Optimized, 4 Active/Unoptimized
B. 6 Active/Optimized, 2 Active/Unoptimized
C. 2 Active/Optimized, 6 Active/Unoptimized
D. 8 Active/Optimized, 0 Active/Unoptimized

Show Suggested Answer

Suggested Answer: A 🗳️

by wei_wei at July 7, 2025, 7:16 a.m.

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358755d

1 day, 7 hours ago

Selected Answer: D

I agree with your arguments, and here an ASA is the topic. So D must be correct,

upvoted 1 times

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7afd1df

4 months ago

Selected Answer: A

NetApp ASA systems use symmetric active-active multipathing, meaning all paths to a given LUN or NVMe namespace are Active/Optimized (no Active/Unoptimized paths). This is a key feature of ASA systems, as they optimize all paths through both controllers, improving performance and reducing failover time compared to non-ASA systems where paths are prioritized as Active/Optimized (AO) and Active/Non-Optimized (ANO). In an asymmetric configuration (pre-ONTAP 9.15.1 or if explicitly configured), the secondary site’s paths are Active/Non-Optimized (ANO) because I/O is proxied to the primary site. This would result in 4 Active/Optimized paths (from the primary cluster) and 4 Active/Unoptimized paths (from the secondary cluster). https://docs.netapp.com/us-en/ontap/snapmirror-active-sync/index.html#benefits

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