Three or more devices share a link in ________ connection.

In a multipoint connection, three or more devices share a single communication link. This is different from point-to-point, which connects only two devices. Multipoint connections allow multiple nodes to communicate over the same medium, such as in Ethernet networks. Other examples include frame relay and ATM. The term 'unipoint' is not used in networking, and 'simplex' refers to one-way communication, not the number of devices.