300-415 Question #18: Real Exam Question with Answer & Explanation

The correct answer is D: DTLS. DTLS (Datagram Transport Layer Security) is the default protocol used for control plane connections in the Cisco SD-WAN architecture.

Architecture

Question

What is a default protocol for control plane connection?

Options

AHTTPS
BTLS
CIPsec
DDTLS

Explanation

DTLS (Datagram Transport Layer Security) is the default protocol used for control plane connections in the Cisco SD-WAN architecture.

Common mistakes.

A. HTTPS is used for management plane communication with vManage's REST API and GUI, not as the default control plane protocol.
B. TLS operates over TCP and can be configured for SD-WAN control plane connections, but DTLS over UDP is the default protocol used when no override is specified.
C. IPsec is the default data plane encapsulation protocol used for securing traffic between WAN Edge routers, not for control plane signaling.

Concept tested. Cisco SD-WAN default control plane connection protocol

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/system-overview.html

Topics

#SD-WAN Control Plane#DTLS#vSmart#Control Plane Protocols

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