300-415 Question #80: Real Exam Question with Answer & Explanation

The correct answer is C: VPN 0. VPN 0 is the transport VPN in Cisco SD-WAN that carries all underlay WAN connectivity, connecting WAN Edge transport interfaces directly to the WAN or internet.

Architecture

Question

Which VPN connects the transport-side WAN Edge interface to the underlay/WAN network?

Options

AVPN 1
BVPN 511
CVPN 0
DVPN 512

Explanation

VPN 0 is the transport VPN in Cisco SD-WAN that carries all underlay WAN connectivity, connecting WAN Edge transport interfaces directly to the WAN or internet.

Common mistakes.

A. VPN 1 is the default service-side VPN used for LAN-facing traffic and user data forwarding; it is not the transport VPN.
B. VPN 511 is not a standard reserved VPN in the Cisco SD-WAN architecture.
D. VPN 512 is the out-of-band management VPN used to reach device management interfaces such as SSH; it is not the WAN transport VPN.

Concept tested. SD-WAN VPN 0 as the designated transport VPN

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/system-interface/ios-xe-17/systems-interfaces-book-xe/system-interface.html

Topics

#VPN 0#SD-WAN Underlay#WAN Edge Transport#Transport VPN

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