Which technology is based on the concept of turn taking and allows users to send data across the Internet concurrently?

Packet switching is the correct technology because it operates by breaking down data into smaller packets, which are then sent across the Internet independently over various paths. This method allows for concurrent data transmission, meaning that multiple packets can travel through the network simultaneously, optimizing the use of network resources and enhancing communication efficiency.

While store-and-forward methods can temporarily hold messages before passing them to their final destination, they do not support the concurrent transmission of data as effectively as packet switching. Circuit-switching establishes a dedicated communication path for the entire duration of a transmission, which is less efficient for multiple users compared to packet switching. Frame relay is a specific type of packet-switched technology primarily used for connecting local area networks but still relies on the packet-switching principle. Thus, packet switching stands out for its ability to enable simultaneous data communication and efficient use of network capacity.