300-415 Question #248: Real Exam Question with Answer & Explanation

The correct answer is A: HTTP. REST APIs in Cisco SD-WAN environments communicate using HTTP, typically secured with TLS/SSL, to interact with network devices and controllers.

Management and Operations

Question

Which protocol is used by the REST API to communicate with network devices in the Cisco SD-WAN network?

Options

AHTTP
BSSL
CIPSec
DSSH

Explanation

REST APIs in Cisco SD-WAN environments communicate using HTTP, typically secured with TLS/SSL, to interact with network devices and controllers.

Common mistakes.

B. SSL (or TLS) is a security protocol that encrypts HTTP traffic (making it HTTPS), but it is not the application-layer protocol used by REST APIs for communication itself.
C. IPSec is a network layer security protocol used for securing IP communications, commonly used for VPN tunnels in SD-WAN data plane, but not for REST API communication.
D. SSH (Secure Shell) is a protocol for secure remote command-line access and file transfer, not the protocol used by REST APIs.

Concept tested. REST API communication protocol

Reference. https://developer.cisco.com/docs/sdwan/#!rest-api-overview/introduction-to-the-cisco-sd-wan-rest-api

Topics

#REST API#Cisco SD-WAN#HTTP#Network Programmability

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