Switch forwards a frame out all ports except the ingress port. What is this process called?

Flooding occurs when a switch doesn't have a destination MAC address in its MAC address table. To ensure the frame reaches its intended recipient, the switch sends the frame out all ports except the one it arrived on. If the destination device is on the network, it will receive the frame and respond, allowing the switch to learn its MAC address and update its table. ARP (Address Resolution Protocol) maps IP addresses to MAC addresses, but it's not the process of forwarding unknown unicast frames. CDP (Cisco Discovery Protocol) is a proprietary protocol for discovering directly connected Cisco devices. Multicast is a specific type of transmission where a single frame is sent to a select group of destinations, not all ports.