350-401 Question #1051: Real Exam Question with Answer & Explanation

Question

Which technology is used as the basis for the Cisco SD-Access data plane?

Options

• ALISP
• B802.1Q
• CVXLAN
• DIPsec

Explanation

Cisco SD-Access utilizes VXLAN as the foundational data plane encapsulation technology to extend Layer 2 segments over a Layer 3 network.

Common mistakes.

• A. LISP (Location/ID Separation Protocol) is utilized in Cisco SD-Access as the control plane technology for endpoint identification and mapping, not for data plane encapsulation.
• B. 802.1Q is the standard for VLAN tagging on Ethernet frames, primarily used in traditional Layer 2 networks, but not the underlying data plane encapsulation for the SD-Access fabric.
• D. IPsec is a security protocol used for encryption and authentication of IP packets, which can be applied to traffic but is not the fundamental encapsulation method for the SD-Access data plane itself.

Concept tested. Cisco SD-Access data plane technology

Reference. https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sd-access-design-guide.html

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