Cisco Certified Network Professional Enterprise CCNP Enterprise · Free Practice Question Easy
Question 31
Which protocol is responsible for data plane forwarding in a Cisco SD-Access deployment?
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A
LISP
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B
BGP
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C
VXLAN
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D
OSPF
Reveal correct answer
Correct answer: C
Explanation
In a Cisco SD-Access deployment, Virtual Extensible LAN (VXLAN) is responsible for data plane forwarding by encapsulating Ethernet frames within UDP packets, enabling scalable Layer 2 and Layer 3 network virtualization over an IP-based underlay. VXLAN allows end-to-end communication between fabric edge nodes by creating logical Layer 2 and Layer 3 overlays while maintaining network segmentation through VXLAN Network Identifiers (VNIs). This encapsulation allows traffic to traverse the SD-Access fabric without traditional VLAN limitations, improving scalability and mobility. Additionally, VXLAN supports Anycast Gateway functionality, enabling seamless host mobility by ensuring that all fabric edge nodes advertise the same gateway IP and MAC address. By using VXLAN for forwarding, SD-Access ensures efficient, secure, and scalable traffic delivery across the enterprise network.
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