Answer: D. Packet switching

Explanation: The correct answer is “Packet switching”. Packet switching is a communication method in which data is divided into packets, transmitted over a network, and reassembled at the destination. This method is efficient for data transmission in digital networks, including the internet.

Run down: Packet switching breaks down data into smaller units (packets) that are sent independently through a network and reassembled at the endpoint. It ensures efficient use of network resources and is fundamental to modern communication systems like the internet.