The correct conclusion is that all APs are running the same software version and are compatible with the WLC. This is because the show ap inventory all command provides a direct-answer interpretation of each access point’s model and software image, and here all three APs—including the legacy AIR-CAP3702I-A-K9 and the newer 2800 and 3800 series—report the same software version 8.5.151.0, indicating the WLC has successfully joined and is managing them with a unified code base. On the ENCOR 350-401 exam, this output tests your ability to quickly verify AP compatibility and software consistency across mixed hardware generations, a common scenario in real-world WLC migrations. A frequent trap is assuming different models must run different software, but the key is that the WLC pushes a single compatible image to all joined APs. Memory tip: “Same version, different models—WLC unifies the code.”
350-401 Wireless Infrastructure Practice Question
This 350-401 practice question tests your understanding of wireless infrastructure. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
A network engineer runs the following command on a Cisco WLC:
WLC# show ap inventory all
AP Inventory Information
-----------------------
AP Name: AP-1
Base MAC: aabb.cc00.0100
Model: AIR-CAP3702I-A-K9
Software: 8.5.151.0
AP Name: AP-2
Base MAC: aabb.cc00.0200
Model: AIR-AP2802I-B-K9
Software: 8.5.151.0
AP Name: AP-3
Base MAC: aabb.cc00.0300
Model: AIR-AP3802I-A-K9
Software: 8.5.151.0
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
All APs are running the same software version and are compatible with the WLC.
The show ap inventory all command displays the model and software version of each AP. The output shows three APs with different models but the same software version. The key point is that the CAP3702I is a legacy AP that requires a specific software version, while the 2800 and 3800 series are newer. The output indicates all APs are running the same software, which is compatible with the WLC version.
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.
✓
All APs are running the same software version and are compatible with the WLC.
Why this is correct
The output shows all APs have the same software version 8.5.151.0, indicating compatibility.
Related concept
Static NAT maps one inside address to one outside address.
✗
AP-1 is a lightweight AP and AP-2 and AP-3 are autonomous APs.
Why it's wrong here
All APs are lightweight (CAP and AIR-AP models) and managed by the WLC.
✗
AP-3 has a hardware failure because its model is different.
Why it's wrong here
Different models are normal; no failure is indicated.
✗
The WLC is running a software version that only supports AP-2 and AP-3.
Why it's wrong here
All APs are supported as they are all running the same software version.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 350-401 question in full detail.
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 350-401 NAT questions on configuration and troubleshooting.
Wireless Infrastructure — This question tests Wireless Infrastructure — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: All APs are running the same software version and are compatible with the WLC. — The show ap inventory all command displays the model and software version of each AP. The output shows three APs with different models but the same software version. The key point is that the CAP3702I is a legacy AP that requires a specific software version, while the 2800 and 3800 series are newer. The output indicates all APs are running the same software, which is compatible with the WLC version.
What should I do if I get this 350-401 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 350-401 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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