350-501 Automation and Assurance Practice Question
This 350-501 practice question tests your understanding of automation and assurance. 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.
Refer to the exhibit. A telemetry subscription is configured on an IOS-XR router. The collector at 10.1.1.100 is not receiving data. Which configuration error is present?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Missing 'protocol' specification in the destination-group
In IOS-XR, the destination-group requires a protocol (e.g., 'protocol grpc') to be specified. Without it, the destination is incomplete and data will not be sent. The sensor-group path is valid, sample-interval is reasonable, destination IP/port are present, and subscription is committed. The missing protocol is the most likely error.
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 destination IP address is incorrect
Why it's wrong here
The exhibit shows a valid IPv4 address; there is no evidence it is incorrect.
✓
Missing 'protocol' specification in the destination-group
Why this is correct
The destination-group must include 'protocol grpc' or 'protocol tcp'; otherwise, no data is transmitted.
Related concept
Static NAT maps one inside address to one outside address.
✗
The sample-interval is too short
Why it's wrong here
A sample interval of 10000 ms (10 seconds) is typical and should work.
✗
The subscription is not committed
Why it's wrong here
The configuration is shown as a complete block; it is assumed committed.
✗
The sensor-group path is invalid
Why it's wrong here
'openconfig-interfaces:interfaces state' is a valid path supported in IOS-XR.
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.
Trap categories for this question
Command / output trap
The exhibit shows a valid IPv4 address; there is no evidence it is incorrect.
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 350-501 NAT questions on configuration and troubleshooting.
Automation and Assurance — This question tests Automation and Assurance — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Missing 'protocol' specification in the destination-group — In IOS-XR, the destination-group requires a protocol (e.g., 'protocol grpc') to be specified. Without it, the destination is incomplete and data will not be sent. The sensor-group path is valid, sample-interval is reasonable, destination IP/port are present, and subscription is committed. The missing protocol is the most likely error.
What should I do if I get this 350-501 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 350-501 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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