The answer is that the second zone is missing the other storage controller's WWPN, which prevents the host from seeing the second storage path. In Fibre Channel zoning, each zone must include both the initiator and all target ports that need to communicate; if a zone only contains one storage port from a dual-controller array, the host will lack a path to the second controller, causing the "FC zoning host cannot see storage path" issue. This scenario tests your understanding of redundant path design in Cisco DCCOR and CCNP Data Center Core 350-601, where a common trap is assuming a single zone per server is sufficient without verifying that both storage controllers are members. The key is that each zone must mirror the full multipath topology—if the first zone works but the second does not, check for missing controller WWPNs, not VSAN or activation problems. Memory tip: "One zone, one path; two controllers, both in the zone."
350-601 Storage Network Practice Question
This 350-601 practice question tests your understanding of storage network. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
zone name Server1_Storage1 vsan 100
member pwwn 10:00:00:00:c9:2b:1a:5f
member pwwn 20:00:00:00:c9:2b:1a:6a
member pwwn 20:00:00:00:c9:2b:1a:6b
zone name Server1_Storage2 vsan 100
member pwwn 10:00:00:00:c9:2b:1a:5f
member pwwn 20:00:00:00:c9:2b:1a:6c
zoneset name Production vsan 100
member Server1_Storage1
member Server1_Storage2
Refer to the exhibit. A server with WWPN 10:00:00:00:c9:2b:1a:5f is zoned to two storage ports in zone Server1_Storage1 and to one storage port in zone Server1_Storage2. The server can access the LUNs through the first zone but not through the second. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
zone name Server1_Storage1 vsan 100
member pwwn 10:00:00:00:c9:2b:1a:5f
member pwwn 20:00:00:00:c9:2b:1a:6a
member pwwn 20:00:00:00:c9:2b:1a:6b
zone name Server1_Storage2 vsan 100
member pwwn 10:00:00:00:c9:2b:1a:5f
member pwwn 20:00:00:00:c9:2b:1a:6c
zoneset name Production vsan 100
member Server1_Storage1
member Server1_Storage2
A
The second zone does not include the second storage controller's port
The server may need both storage paths to access LUNs; missing port causes no path.
B
The storage port 20:00:00:00:c9:2b:1a:6c is in a different VSAN
Why wrong: Zones are in VSAN 100; the port is presumably in VSAN 100.
C
The zone set has not been activated
Why wrong: If the zone set were not active, first zone would also fail.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The second zone does not include the second storage controller's port
The second zone Server1_Storage2 only has the server and one storage port. The server should have also a member for the second storage controller path. Option D best fits: the zone is missing the other storage controller's WWPN. Option A (zone set activation) unlikely as the other zone works. Option B (multiple zones per server) is fine. Option C (VSAN mismatch) not indicated.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
The second zone does not include the second storage controller's port
Why this is correct
The server may need both storage paths to access LUNs; missing port causes no path.
Clue confirmation
The clue words "first", "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The storage port 20:00:00:00:c9:2b:1a:6c is in a different VSAN
Why it's wrong here
Zones are in VSAN 100; the port is presumably in VSAN 100.
✗
The zone set has not been activated
Why it's wrong here
If the zone set were not active, first zone would also fail.
✗
The server is not allowed to be in multiple zones
Why it's wrong here
Devices can be in multiple zones.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 350-601 NAT questions on configuration and troubleshooting.
Storage Network — This question tests Storage Network — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The second zone does not include the second storage controller's port — The second zone Server1_Storage2 only has the server and one storage port. The server should have also a member for the second storage controller path. Option D best fits: the zone is missing the other storage controller's WWPN. Option A (zone set activation) unlikely as the other zone works. Option B (multiple zones per server) is fine. Option C (VSAN mismatch) not indicated.
What should I do if I get this 350-601 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 350-601 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "first", "most likely". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Refer to the exhibit. A host with WWPN 10:00:00:00:c9:29:3b:23 can only see its own WWPN but not the target. What is the likely cause?
medium
A.The host is in a different VSAN.
✓ B.The target is missing from the zone.
C.The zoneset is not the full zoneset.
D.The host's FLOGI is rejected.
E.The zone is not activated.
Why B: Option A is correct. Zone_C contains only the initiator (10:00:00:00:c9:29:3b:23) and no target members, so the host cannot communicate with any storage. Option B is incorrect; the zoneset is active and named ZS_1. Option C is incorrect; all devices are in VSAN 1 per the command. Option D is incorrect; the zone is listed in the active zoneset. Option E is incorrect; there is no indication of FLOGI failure.
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Question Discussion
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