350-401 Architecture Practice Question
A company is migrating its branch WAN to a Cisco SD-WAN solution. The design team wants to use a single overlay that supports both point-to-point and multipoint traffic, and they want to avoid running separate tunnels for unicast and multicast. Which Cisco SD-WAN technology should they enable on the overlay?
⚠ Common exam trap
Many candidates confuse overlay path-selection or offload features with the mechanism that actually replicates multicast traffic across the SD-WAN fabric.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Cisco SD-WAN multicast with replication using a rendezvous point
Multicast support in Cisco SD-WAN uses overlay replication coordinated by a rendezvous point, letting the same fabric carry unicast and multicast without parallel tunnel types. Application-Aware Routing, TLOC extension, and Direct Internet Access serve different purposes and do not deliver multipoint transport across the overlay.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Cisco SD-WAN multicast with replication using a rendezvous point
Why this is correct
Cisco SD-WAN supports multicast over the overlay by replicating traffic through the fabric with a rendezvous point, allowing one overlay to carry both unicast and multicast. This meets the goal of a single overlay without separate tunnels for each traffic type.
- ✗
Cisco SD-WAN Direct Internet Access with NAT
Why it's wrong here
Direct Internet Access offloads internet-bound traffic locally at the branch and uses NAT. It is a traffic-offload feature, not a multicast transport mechanism, so it cannot satisfy the design goal of multipoint traffic over the SD-WAN overlay.
- ✗
Cisco SD-WAN Application-Aware Routing with BFD probes
Why it's wrong here
Application-Aware Routing uses BFD and policy to steer traffic across links based on performance, but it does not provide multicast transport over the overlay. It addresses path selection for unicast flows, not the requirement to carry multicast in the same overlay.
- ✗
Cisco SD-WAN TLOC extension between two transports
Why it's wrong here
TLOC extension lets an edge device share its WAN transport with another device, useful for redundancy at a site. It does not enable multicast forwarding across the fabric, so it fails the requirement to support both point-to-point and multipoint traffic in one overlay.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.