Which one of the following uses one-to-one transmission to deliver video from one point in the network to another?

Unicast is the method that utilizes one-to-one transmission to convey video from a specific source to a particular destination within the network. In unicast communication, a unique address is assigned to each endpoint, allowing data to be sent directly to a single device without involving other devices on the network. This means that each session of communication is exclusive to the two endpoints involved, resulting in precise delivery of the video stream.

This method is particularly beneficial in scenarios where a dedicated connection is necessary, such as when streaming high-quality video content directly to a user, allowing for optimal bandwidth usage tailored to the needs of that individual connection. Additionally, it ensures that data integrity and quality are maintained since only one user is consuming the content at that moment.

In contrast, the other options involve different types of data transmission. Broadcast sends data to all devices on the network, multicast targets a specific group of devices, and peer-to-peer involves sharing resources between multiple devices directly without a centralized server. Each of these methods operates differently from unicast, focusing on group or collective delivery rather than the point-to-point nature that unicast prioritizes.