The answer is HTTPS, which is the correct match for “Secure transport for API communication” because it encrypts data in transit between an SDN controller and applications or devices, ensuring confidentiality and integrity. In the context of SDN API concepts, northbound APIs face applications and often use HTTPS for secure RESTful calls, while southbound APIs like OpenFlow manage network devices. On the CCNA 200-301 v2 exam, this drag-and-drop task tests your ability to distinguish between API types, data formats, and transport protocols—a common trap is confusing JSON (a lightweight data format using key/value pairs) with a transport method, or mistaking YAML’s human-readable serialization for JSON. Remember the mnemonic: “HTTPS Hides Traffic, Providing Security” to lock in that HTTPS is the secure transport, not a protocol for device configuration or a data format.
CCNA AI and Network Operations Practice Question
This 200-301 practice question tests your understanding of ai and network operations. 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. A key principle to apply: a northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.. 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.
Drag each automation or API concept from the left to its corresponding description on the right. Not all descriptions are used.
Concepts:
- Northbound API
- Southbound API
- JSON
- HTTPS
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Application-facing interface to the controller
Northbound API: the application-facing interface of an SDN controller, allowing apps to request services. Southbound API: the interface that enables the controller to configure managed devices, such as OpenFlow. JSON: a structured data format using key/value pairs and arrays, lightweight and machine‑friendly. HTTPS: secure, encrypted transport for API communications, protecting data in transit. Distractors: 'Human-readable serialization format' describes YAML, not JSON or APIs. 'Protocol for network device configuration' might refer to NETCONF or CLI, not HTTPS or the APIs listed.
Key principle: A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Application-facing interface to the controller
Why this is correct
Matches Northbound API: provides a programmatic interface for applications to interact with the SDN controller.
Related concept
A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.
Matches Southbound API: allows the controller to push policies to network devices like switches and routers.
Related concept
A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.
✓
Structured data format
Why this is correct
Matches JSON: a data‑interchange format that uses human‑readable text to store and transmit data objects.
Related concept
A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.
✓
Secure transport for API communication
Why this is correct
Matches HTTPS: HTTP over TLS provides encryption and authentication for REST API calls.
Related concept
A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Be careful not to confuse JSON and YAML: JSON uses brackets and is machine-friendly, while YAML uses indentation and is human-friendly. Also, remember that Ansible uses YAML, not XML.
Detailed technical explanation
How to think about this question
Network automation relies heavily on APIs to enable programmability and centralized control. The core concept involves a controller acting as an intermediary between applications and network devices. Northbound APIs provide an interface for applications to communicate with the controller, requesting network state information or pushing configuration changes. These APIs abstract the complexity of the underlying network, allowing developers to automate tasks without dealing directly with device-specific commands.
Southbound APIs operate in the opposite direction, enabling the controller to communicate with managed devices such as routers and switches. These APIs translate the controller's high-level instructions into device-specific protocols like NETCONF or RESTCONF. This separation of roles allows for modular and scalable automation architectures, where the controller manages device interactions while applications focus on business logic and orchestration.
A common exam trap is confusing northbound and southbound APIs or mixing their roles. Northbound APIs are used by applications to talk to controllers, while southbound APIs are used by controllers to manage devices. Additionally, JSON is often mistaken as a protocol rather than a data format, and HTTPS is sometimes overlooked as the secure transport layer. Understanding these distinctions is crucial for correctly implementing and troubleshooting Cisco automation solutions in the CCNA context.
KKey Concepts to Remember
A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.
A southbound API allows a network controller to communicate downward to managed devices and infrastructure, enabling configuration and monitoring of network elements.
JSON is a lightweight, text-based data format used to structure data exchanged between network devices and controllers in automation workflows.
HTTPS provides a secure transport layer for API communications, ensuring confidentiality and integrity of data exchanged between clients and network controllers.
In Cisco automation, northbound APIs abstract network device details, allowing applications to interact with the controller rather than individual devices.
Southbound APIs translate high-level controller commands into device-specific instructions, supporting protocols like NETCONF, RESTCONF, or SNMP.
Understanding the distinction between northbound and southbound APIs is critical for designing scalable and manageable network automation solutions.
Using JSON over HTTPS is a common practice in Cisco network programmability to ensure secure, standardized data exchange in automation tasks.
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
A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-301 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. A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 200-301 question in full detail.
Review a northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability., then practise related 200-301 questions on the same topic to reinforce the concept.
AI and Network Operations — This question tests AI and Network Operations — A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability..
What is the correct answer to this question?
The correct answer is: Application-facing interface to the controller — Northbound API: the application-facing interface of an SDN controller, allowing apps to request services. Southbound API: the interface that enables the controller to configure managed devices, such as OpenFlow. JSON: a structured data format using key/value pairs and arrays, lightweight and machine‑friendly. HTTPS: secure, encrypted transport for API communications, protecting data in transit. Distractors: 'Human-readable serialization format' describes YAML, not JSON or APIs. 'Protocol for network device configuration' might refer to NETCONF or CLI, not HTTPS or the APIs listed.
What should I do if I get this 200-301 question wrong?
Review a northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
A northbound API enables applications to communicate with a network controller to request data or send commands, facilitating network automation and programmability.
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