This 350-401 practice question tests your understanding of model-driven telemetry. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Review the following telemetry configuration snippet:
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The receiver should specify a source interface to ensure consistent source IP for the telemetry stream.
The configuration is missing a source interface or source IP address, which is recommended for telemetry receivers to ensure reachability and consistent source addressing.
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 configuration is correct and complete.
Why it's wrong here
While functional, best practice is to specify a source interface for the telemetry receiver.
✗
The update-policy period of 100 milliseconds is too fast and may cause performance issues.
Why it's wrong here
100 ms is a valid interval, though it may be aggressive; the configuration is not incorrect.
✓
The receiver should specify a source interface to ensure consistent source IP for the telemetry stream.
Why this is correct
Adding source-interface (e.g., Loopback0) is recommended for reliability and management.
Related concept
Static NAT maps one inside address to one outside address.
✗
The encoding should be encode-xml for IETF subscriptions.
Why it's wrong here
encode-kvgpb is valid and commonly used for gRPC.
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.
Model-Driven Telemetry — This question tests Model-Driven Telemetry — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The receiver should specify a source interface to ensure consistent source IP for the telemetry stream. — The configuration is missing a source interface or source IP address, which is recommended for telemetry receivers to ensure reachability and consistent source addressing.
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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Question Discussion
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