Meaning – The term physical connection, refers to a connection that establishes an electrical circuit. The kind of physical connection depends on the needs of the connection and the size of the network.
Usually, copper cables and fiber optic cables are used to establish physical connections to the network.
Since the landline telephone system originally used copper wires, the first Internet connections reused that technology and many still use it today.
A fiber-optic cable contains an optical fiber that can carry light (instead of electricity). The fiber is coated with plastic layers and sheathed in a protective tube to protect it from the environment.
Example of usage – “When the engineer was tasked with setting up a network connection, the first thing he had to establish was the king of physical connection that would be the best for the location. He decided to go for the newer fiber-optic connection.”