Question 1easymatching
Full question →Match each data format or model with the best description.
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easymatchingObjective-mapped
Match each data format or model with the best description.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is confusing data formats like JSON and XML with data modeling languages such as YANG. Candidates often mistake REST, which is a protocol style using HTTP methods, as a data format or model. This confusion leads to incorrect matching because JSON and XML are data serialization formats, YANG defines the structure and constraints of configuration data, and REST is an API interaction method. Misunderstanding these distinctions can cause errors in automation and programmability questions on the CCNA 200-301 exam.
Technical deep dive
How to think about this question
JSON (JavaScript Object Notation) is a lightweight, text-based data format widely used in network automation for data interchange. It represents data as key-value pairs and arrays, making it easy for both humans and machines to read and write. JSON is commonly used in REST APIs for sending and receiving configuration and operational data in Cisco devices, supporting automation workflows efficiently. XML (Extensible Markup Language) is a tag-based data format that encodes documents in a format both human-readable and machine-readable. It uses nested tags to define data hierarchies and is often used in network management protocols like NETCONF. XML's verbosity compared to JSON makes it less popular in some automation contexts but remains important in legacy systems and certain Cisco programmability scenarios. YANG (Yet Another Next Generation) is a data modeling language used to define the structure, constraints, and semantics of configuration and state data manipulated by network management protocols such as NETCONF and RESTCONF. Unlike JSON and XML, which are data formats, YANG defines the schema that these data formats represent. REST (Representational State Transfer) is an architectural style that uses HTTP methods like GET, POST, PUT, and DELETE to interact with resources, often exchanging data in JSON or XML format. Understanding these distinctions is critical for Cisco automation and programmability topics on the CCNA exam.
KKey Concepts to Remember
- JSON is a lightweight data format that represents data as key-value pairs and arrays, commonly used in REST APIs for network automation.
- XML is a tag-based data format that encodes hierarchical data structures and is often used with NETCONF for network device management.
- YANG is a data modeling language that defines the structure and constraints of configuration and operational data in network devices.
- REST is an architectural style that uses HTTP methods to interact with network resources, typically exchanging data in JSON or XML format.
- The CCNA exam expects candidates to distinguish between data formats (JSON, XML), data models (YANG), and API interaction styles (REST).
- YANG models provide the schema that data formats like JSON or XML follow when configuring or retrieving device information.
- REST APIs use standard HTTP methods such as GET, POST, PUT, and DELETE to perform CRUD operations on network device resources.
- Confusing REST as a data format rather than an API interaction method is a common mistake in Cisco automation questions.
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.
Related practice questions
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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 is a lightweight data format that represents data as key-value pairs and arrays, commonly used in REST APIs for network automation.
What exam trap should I watch out for?
Common exam trap: answer the scenario, not the keyword: A common exam trap is confusing data formats like JSON and XML with data modeling languages such as YANG. Candidates often mistake REST, which is a protocol style using HTTP methods, as a data format or model. This confusion leads to incorrect matching because JSON and XML are data serialization formats, YANG defines the structure and constraints of configuration data, and REST is an API interaction method. Misunderstanding these distinctions can cause errors in automation and programmability questions on the CCNA 200-301 exam.
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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