The technology that allows for two-way communication in smart homes is typically based on IoT protocols such as Zigbee, Z-Wave, or Wi-Fi. These technologies enable devices to send and receive data, allowing users to control home appliances, lighting, and security systems remotely. For example, users can interact with smart speakers to manage home systems or receive alerts from security cameras. This seamless communication between devices creates a cohesive and automated smart home experience, improving convenience and energy efficiency.