Which type of address allows for communication from one-to-all?

The correct answer is multicast. Multicast is a communication method that allows the transmission of data from one sender to multiple specific receivers at the same time. This is particularly efficient for applications such as streaming media or webcasts, where the same data needs to be sent to multiple subscribers.

Multicast addresses are part of a defined range and are specially designed for this purpose, utilizing the Internet Group Management Protocol (IGMP) to manage group memberships. It creates a unique and efficient way to communicate with a group of receivers without sending multiple copies of the same data stream, thus conserving bandwidth.

In contrast, other address types serve different communication needs. Anycast enables communication between a single sender and the nearest member of a group of potential receivers, but it isn't about sending to all intended recipients. Broadcast sends data to all devices on a network segment, which can lead to network congestion if overused. Unicast involves one-to-one communication where data is sent from one sender to one specific receiver, which does not align with the concept of one-to-all communication.