Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
An engineer receives API output that starts with curly braces and contains name-value pairs. Which data format is being used?
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
Distractor review
YANG
YANG is a modeling language, not the data payload format shown here.
B
Best answer
JSON
The structure described is JSON.
C
Distractor review
Syslog
Syslog is a logging protocol and message format.
D
Distractor review
SMTP
SMTP handles email transfer.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking YANG for the data format when seeing curly braces and name-value pairs. YANG is a modeling language that defines the structure and constraints of network data but does not represent the actual data payload. Candidates might also confuse Syslog or SMTP with JSON due to their familiarity with network protocols, but these protocols do not use JSON’s syntax. This confusion leads to selecting incorrect answers, especially under time pressure. Recognizing that JSON is the payload format commonly used in Cisco APIs helps avoid this mistake and correctly interpret automation output.
Technical deep dive
How to think about this question
JSON (JavaScript Object Notation) is a lightweight data-interchange format that represents data as key-value pairs enclosed in curly braces. It is widely used in network automation and programmability because it is easy for both humans and machines to read and write. In Cisco networking APIs, JSON is the standard format for exchanging configuration and operational data, enabling automation tools to parse and manipulate network device information efficiently. When an engineer receives API output starting with curly braces and containing name-value pairs, the data format is JSON. This format contrasts with other network data representations like YANG, which is a modeling language defining data structure but not the actual payload format. JSON’s structure allows network engineers to automate tasks such as device configuration, monitoring, and troubleshooting by integrating with Cisco’s programmability frameworks like RESTCONF and NETCONF. A common exam trap is confusing JSON with YANG or other protocols like Syslog or SMTP. While YANG defines how data should be modeled, JSON is the actual data format used to encode that model’s data. Syslog and SMTP serve different purposes—logging and email transfer respectively—and do not use curly braces or name-value pairs in their message formats. Understanding this distinction is critical for correctly identifying data formats in Cisco automation contexts.
KKey Concepts to Remember
- JSON represents network data as key-value pairs enclosed in curly braces, making it easy to read and parse in automation contexts.
- Cisco network APIs commonly use JSON as the data payload format for configuration and operational information exchange.
- YANG is a data modeling language that defines the structure of network data but does not represent the actual data format.
- Syslog is a protocol for logging network events and does not use JSON syntax or curly braces in its message format.
- SMTP is an email transfer protocol unrelated to network data modeling or API data formats like JSON.
- Recognizing JSON syntax in API output helps network engineers automate device management and troubleshooting effectively.
- Confusing YANG with JSON payload format is a common exam mistake; understanding their distinct roles is essential for CCNA success.
- Automation and programmability in Cisco networks rely heavily on JSON-formatted data for interoperability with management tools.
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
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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
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Question 5
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Question 6
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FAQ
Questions learners often ask
What does this 200-301 question test?
JSON represents network data as key-value pairs enclosed in curly braces, making it easy to read and parse in automation contexts.
What is the correct answer to this question?
The correct answer is: JSON — JSON represents data as objects and arrays using braces, brackets, and name-value pairs. It is the most common format you will see in modern network APIs.
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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