Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
Which two statements accurately describe APIs in controller-based networking?
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
They provide a defined interface through which software can communicate with the controller.
This is correct because APIs are the software interface for controlled interaction.
B
Best answer
They can be used by automation tools to retrieve data or request changes.
This is correct because automation systems commonly rely on APIs for controller interaction.
C
Distractor review
They replace all need for forwarding devices.
This is wrong because forwarding devices still exist in controller-based architectures.
D
Distractor review
They remove the need for authentication and authorization.
This is wrong because secure API access still requires control mechanisms.
E
Distractor review
They are Ethernet cabling standards.
This is wrong because APIs are software interfaces, not physical cable types.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is confusing APIs with physical network components or cabling standards, leading to incorrect answers like APIs being Ethernet cabling standards. Another common mistake is believing APIs remove the need for authentication and authorization, which is false because secure access to network controllers via APIs still requires proper security measures. Candidates might also incorrectly assume APIs replace forwarding devices, but in reality, forwarding devices remain essential in the network infrastructure. Recognizing that APIs are software interfaces designed for programmatic communication with controllers helps avoid these pitfalls.
Technical deep dive
How to think about this question
APIs, or Application Programming Interfaces, in controller-based networking provide a standardized software interface that allows external programs to interact with the network controller. This interaction enables automation tools, orchestration platforms, and custom scripts to retrieve network data, configure devices, and manage network policies programmatically. Cisco’s SDN (Software Defined Networking) solutions rely heavily on APIs to separate the control plane from the data plane, centralizing network intelligence and enabling dynamic network management. The key rule in using APIs within controller-based networking is that they serve as the communication bridge between software applications and the network controller. This means APIs must be well-defined, secure, and capable of handling requests such as data retrieval or configuration changes. Automation tools use these APIs to query network status or push configuration updates, which improves operational efficiency and reduces manual errors. However, APIs do not replace physical forwarding devices; instead, they provide a method to control and program those devices via the controller. A common exam trap is misunderstanding the role of APIs as physical components or assuming they eliminate security requirements. APIs are purely software interfaces and do not replace the need for authentication or authorization mechanisms. In practice, secure API access is critical to prevent unauthorized network changes. Understanding that APIs enable software-driven network management without removing physical devices or security controls is essential for Cisco CCNA candidates to avoid confusion and select the correct answers.
KKey Concepts to Remember
- APIs provide a defined software interface that enables external applications to communicate directly with the network controller.
- Automation tools use APIs to retrieve network data and request configuration changes from the controller programmatically.
- APIs do not replace physical forwarding devices; these devices continue to forward traffic in controller-based architectures.
- Secure API access requires authentication and authorization to protect the network from unauthorized changes.
- APIs enable integration of the network controller with orchestration systems, dashboards, and custom automation scripts.
- Controller-based networking separates the control plane from the data plane, with APIs facilitating control plane programmability.
- Misunderstanding APIs as physical components or cabling standards is a common exam mistake to avoid.
- APIs improve operational efficiency by enabling software-driven network management and reducing manual configuration errors.
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?
APIs provide a defined software interface that enables external applications to communicate directly with the network controller.
What is the correct answer to this question?
The correct answer is: They provide a defined interface through which software can communicate with the controller. — APIs are important in controller-based networking because they give external software a defined way to request data or trigger changes on the controller. In plain language, they make the controller accessible to automation tools, dashboards, orchestration systems, and custom scripts. This helps integrate the controller into broader workflows. APIs do not eliminate the need for security controls, but they do make software-driven operations possible. The wrong answers usually confuse APIs with physical interfaces or claim that they remove the need for authentication. The two correct answers are the ones focused on programmatic access and software integration.
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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