Describe Cisco SD-WAN design considerations (control plane design, overlay design, LAN design, high availability, redundancy, scalability, security design, QoS and multicast over SD-WAN fabric)
3 practice questions under this official exam objective (300-420) — each with the community-verified answer, a full option-by-option explanation and instant feedback.
Which AES Mode for Cisco SD-WAN Multicast Traffic?
Cisco SD-WAN vEdge routers encrypt data-plane traffic with AES-256, and this page establishes that AES-256-GCM is the preferred mode while AES-256-CBC
AES-CBC for Multicast in Cisco SD-WAN (GCM for Unicast)
Cisco SD-WAN prefers AES-256-GCM for unicast encryption, but for multicast applications it uses AES-CBC with an HMAC because GCM's counter/nonce handl
IP-VPN to SD-WAN Migration: More Security and Centralized Policies
Moving from a traditional IP-VPN (MPLS L3 VPN) to Cisco SD-WAN brings increased security through built-in end-to-end encryption and centralized, appli