- A
NED automatically generates YANG models
Why wrong: NEDs are developed manually or using tools, but not automatically generated.
- B
NED is used for path computation in SR-TE
Why wrong: Path computation is done by PCE.
- C
NED can support NETCONF, SNMP, or CLI as southbound protocols
NEDs support multiple protocols.
- D
NED is installed in NSO as a package
NEDs are installed as packages.
- E
NED provides device abstraction, hiding vendor-specific details
NED abstracts the device specifics.
Question 646 of 1,000
350-501 Automation and Quality of Services Practice Question
This 350-501 practice question tests your understanding of automation and quality of services. 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.
Which THREE statements are true regarding NSO's NED? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
NED can support NETCONF, SNMP, or CLI as southbound protocols
Option C is correct because NSO's NED (Network Equipment Driver) is the component that abstracts the southbound communication between NSO and network devices. NEDs can use NETCONF, SNMP, or CLI as the southbound protocol to translate NSO's device-independent configuration into device-specific commands, enabling multi-vendor management.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
NED automatically generates YANG models
Why it's wrong here
NEDs are developed manually or using tools, but not automatically generated.
- ✗
NED is used for path computation in SR-TE
Why it's wrong here
Path computation is done by PCE.
- ✓
NED can support NETCONF, SNMP, or CLI as southbound protocols
Why this is correct
NEDs support multiple protocols.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
NED is installed in NSO as a package
Why this is correct
NEDs are installed as packages.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
NED provides device abstraction, hiding vendor-specific details
Why this is correct
NED abstracts the device specifics.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that NEDs generate YANG models or perform path computation, when in fact NEDs are purely abstraction layers for southbound communication and device configuration.
Detailed technical explanation
How to think about this question
Under the hood, each NED is a package that implements a set of Java or Python callbacks to translate NSO's internal data model (based on YANG) into device-native commands (e.g., Cisco IOS CLI, Juniper JUNOS XML, or SNMP MIBs). In real-world deployments, a single NSO instance can manage hundreds of devices from different vendors simultaneously, with each NED handling the specific syntax and quirks of its target device OS, such as the difference between 'no shutdown' in Cisco IOS and 'set interfaces ge-0/0/0 unit 0 family inet address' in Juniper.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-501 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Automation and Quality of Services — study guide chapter
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FAQ
Questions learners often ask
What does this 350-501 question test?
Automation and Quality of Services — This question tests Automation and Quality of Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: NED can support NETCONF, SNMP, or CLI as southbound protocols — Option C is correct because NSO's NED (Network Equipment Driver) is the component that abstracts the southbound communication between NSO and network devices. NEDs can use NETCONF, SNMP, or CLI as the southbound protocol to translate NSO's device-independent configuration into device-specific commands, enabling multi-vendor management.
What should I do if I get this 350-501 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.
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