Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
Which two statements accurately describe software-defined networking and network virtualization concepts at a basic CCNA level?
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
SDN is associated with more centralized or programmable control of network behavior.
This is correct because that is the core SDN idea at this level.
B
Best answer
NFV is associated with delivering network functions in software or virtualized form.
This is correct because that is the core NFV idea.
C
Distractor review
Both terms are just new names for subnet masks.
This is wrong because neither concept is an addressing term.
D
Distractor review
Both terms replace the need for routing protocols completely.
This is wrong because these concepts do not eliminate routing logic entirely.
E
Distractor review
Both terms refer only to wireless client roaming.
This is wrong because they are broader network architecture concepts.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking SDN and NFV for basic network addressing concepts like subnet masks or for wireless client roaming features. Candidates might also incorrectly believe these technologies replace routing protocols entirely. However, SDN and NFV focus on centralized control and virtualized network functions, respectively, and do not eliminate the need for routing logic or relate directly to subnetting or wireless roaming. Misunderstanding these distinctions can lead to selecting incorrect options that describe unrelated networking concepts.
Technical deep dive
How to think about this question
Software-Defined Networking (SDN) is a network architecture approach that separates the control plane, which makes decisions about where traffic is sent, from the data plane, which forwards traffic to the selected destination. This separation allows network administrators to programmatically control network behavior centrally through an SDN controller, rather than configuring individual devices manually. SDN enables more flexible, dynamic, and automated network management, which is a key concept in Cisco’s automation and programmability curriculum for the CCNA exam. Network Functions Virtualization (NFV) complements SDN by virtualizing network services traditionally delivered by dedicated hardware appliances. Instead of relying on physical devices like firewalls, routers, or load balancers, NFV runs these functions as software instances on standard servers or virtual machines. This virtualization improves scalability and reduces costs by allowing rapid deployment and management of network functions in software form. NFV does not replace routing protocols or the fundamental logic of packet forwarding but provides a flexible way to deliver network services. A common exam trap is confusing SDN and NFV with unrelated networking concepts such as subnet masks or wireless client roaming. Both SDN and NFV represent architectural shifts toward software-driven network control and service delivery, not basic addressing or wireless features. Another pitfall is assuming these technologies eliminate the need for routing protocols; in reality, routing remains essential for path selection and forwarding decisions. Understanding these distinctions helps avoid misinterpretation and supports correct answers on the CCNA exam.
KKey Concepts to Remember
- Software-Defined Networking (SDN) centralizes network control by separating the control plane from the data plane, enabling programmable network behavior through software.
- Network Functions Virtualization (NFV) delivers traditional network functions like firewalls and load balancers as software instances running on virtual machines or containers instead of dedicated hardware.
- SDN controllers use protocols such as OpenFlow to communicate with network devices, allowing dynamic adjustment of traffic flows and policies in real time.
- NFV reduces dependency on physical appliances by virtualizing network services, which improves scalability, flexibility, and resource utilization in modern networks.
- SDN and NFV are distinct concepts: SDN focuses on centralized control and programmability, while NFV focuses on virtualizing network functions for deployment agility.
- Neither SDN nor NFV replaces routing protocols; routing logic remains essential for path determination and forwarding decisions in IP networks.
- Understanding SDN and NFV concepts helps network engineers design more agile and automated networks, aligning with Cisco’s automation and programmability domain in CCNA.
- SDN and NFV concepts extend beyond wireless client roaming or subnetting and represent broader architectural shifts in network design and operation.
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
Related 200-301 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
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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?
Software-Defined Networking (SDN) centralizes network control by separating the control plane from the data plane, enabling programmable network behavior through software.
What is the correct answer to this question?
The correct answer is: SDN is associated with more centralized or programmable control of network behavior. — At a basic level, these concepts point toward more abstracted, software-driven ways of controlling or delivering networking capabilities. SDN is associated with more centralized or programmable control behavior. NFV is associated with delivering network functions in virtualized software form instead of relying only on fixed-purpose hardware. The goal here is conceptual recognition, not deep architectural implementation detail.
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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