Which feature Is used to propagate ARP broadcast, and link-local frames across a Cisco SD-Access fabric to address connectivity needs for silent hosts that require reception of traffic to start communicating?
Correct Answer: B
Layer 2 Flooding is used in Cisco SD-Access to address the connectivity needs of silent hosts. Silent hosts are devices that do not initiate communication but require reception of traffic to start communicating. In a Cisco SD-Access fabric, these hosts' locations are not known because they have not sent any packets or frames. To ensure connectivity for these devices, Layer 2 Flooding can be enabled, which allows ARP broadcasts and link-local frames to be propagated across the fabric. This ensures that even if a silent host has not initiated communication, it can still receive traffic, which is essential for devices like IP cameras, sensors, or management interfaces that wait for an initial packet to begin communication.