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200-301 · Question #1231
200-301 Question #1231: Real Exam Question with Answer & Explanation
The correct answer is A: building route tables and updating the forwarding table. This question identifies a key network control plane function traditionally handled by devices that is centralized and managed by an SDN controller.
Submitted by anna_se· Mar 5, 2026Automation and Programmability
Question
Which function generally performed by a traditional network device is replaced by a software- defined controller?
Options
- Abuilding route tables and updating the forwarding table
- Bencapsulation and decapsulation of packets in a data-link frame
- Cchanging the source or destination address during NAT operations
- Dencryption and decryption for VPN link processing
Explanation
This question identifies a key network control plane function traditionally handled by devices that is centralized and managed by an SDN controller.
Common mistakes.
- B. Encapsulation and decapsulation of packets in a data-link frame is a data plane function performed by network interface cards (NICs) and switches, which remains largely distributed in SDN.
- C. Changing source or destination addresses during NAT operations is a data plane function performed by routers or firewalls, which SDN controllers can orchestrate but do not directly execute.
- D. Encryption and decryption for VPN link processing is a data plane security function typically performed by dedicated hardware or software on network devices, not a control plane function replaced by an SDN controller.
Concept tested. SDN controller role in control plane
Topics
#SDN#Control Plane#Forwarding Table
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