Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
An API response returns a list of interface objects in JSON. Which structure most likely represents that list?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
An array containing multiple interface objects
This is correct because JSON arrays are the normal way to hold lists of repeated items.
B
Distractor review
A single integer with the value 1
This is wrong because a single integer does not represent a list of interface objects.
C
Distractor review
A native VLAN field
This is wrong because a native VLAN field is a switching concept, not a JSON list structure.
D
Distractor review
An STP root bridge ID
This is wrong because STP root IDs are unrelated to how JSON lists are represented.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking network-specific terms like native VLAN or STP root bridge ID as valid JSON structures representing interface lists. Candidates might incorrectly associate these concepts with the data format rather than their actual networking roles. Another pitfall is selecting a single scalar value, such as an integer, which cannot represent multiple interface objects. This confusion arises from mixing network protocol concepts with data serialization formats. Recognizing that JSON arrays specifically denote ordered collections of objects is essential to avoid this mistake.
Technical deep dive
How to think about this question
JSON (JavaScript Object Notation) is a lightweight data-interchange format widely used in network automation and programmability, including Cisco APIs. It represents data structures using key-value pairs and ordered lists. When an API returns multiple similar entities, such as network interfaces, it uses a JSON array, denoted by square brackets [], to group these objects. Each interface object inside the array typically contains attributes like interface name, status, IP address, and other relevant details. The decision to use a JSON array for multiple interface objects follows the standard convention for representing lists in JSON. Arrays allow the API consumer to iterate over each interface object easily, supporting automation scripts and network management tools. In contrast, a single integer or unrelated fields like native VLAN or STP root bridge ID do not represent collections of interfaces and thus do not fit the expected JSON structure for a list of interfaces. A common exam trap is confusing network concepts with data representation formats. For example, native VLAN and STP root bridge ID are important in switching and spanning tree protocols but are unrelated to how JSON structures lists. Understanding that JSON arrays are the canonical way to represent multiple objects helps avoid this confusion. Practically, network engineers use JSON arrays to parse interface details programmatically, enabling efficient network automation and monitoring.
KKey Concepts to Remember
- JSON arrays use square brackets to group multiple objects, making them the standard structure for lists of interfaces in API responses.
- Each interface object inside a JSON array contains key-value pairs describing attributes like name, status, and IP address.
- Network automation tools rely on JSON arrays to iterate over multiple interface objects efficiently for configuration and monitoring.
- Native VLAN and STP root bridge ID are network concepts unrelated to JSON data structures and do not represent lists of interfaces.
- A single integer value cannot represent multiple interface objects because it lacks the structure to hold repeated items.
- Understanding the difference between network protocol data and JSON serialization formats prevents confusion in automation questions.
- APIs use JSON arrays to provide ordered collections of similar entities, supporting programmability and automation in Cisco environments.
- Recognizing JSON arrays as the canonical list structure helps avoid exam traps involving unrelated network fields or scalar values.
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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?
Question 2
A router shows this output: R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:34 192.168.12.2 GigabitEthernet0/0 10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.12.3 GigabitEthernet0/0 Which statement is correct?
Question 3
What is the OSPF metric called?
Question 4
A non-root switch has two uplinks toward the root bridge. One path has a lower total STP cost than the other. What role will the lower-cost uplink have?
Question 5
A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that web browsing to a server by IP address fails, but ping works. Which statement best explains the behavior?
Question 6
A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?
FAQ
Questions learners often ask
What does this 200-301 question test?
JSON arrays use square brackets to group multiple objects, making them the standard structure for lists of interfaces in API responses.
What is the correct answer to this question?
The correct answer is: An array containing multiple interface objects — In JSON, a list is most naturally represented as an array. In plain language, when an API needs to return several interfaces, routes, VLANs, or similar repeated items, it usually places them inside square brackets as an ordered collection. Each item inside that array might itself be an object containing keys such as name, status, or IP address. CCNA automation questions usually test whether you recognize that square brackets signal a list. If the response contains many similar interface records, the best structure is the one that looks like a JSON array of interface objects rather than a single scalar value.
What should I do if I get this 200-301 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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