What type of signals do metal wires in cables transmit?

Metal wires in cables transmit electrical impulses, which are variations of electric current that represent data. When data is sent through these metal wires, it is converted into electrical signals that can be transmitted over distances. The electrical impulses can carry different forms of information, such as analog audio, digital data, or any other type of signal that can be modulated into an electrical format.

The nature of the electrical impulses allows for reliable transmission over a variety of distances and under various conditions, making metal wires a widely used medium in networking. For example, twisted pair and coaxial cables, which contain copper wires, are commonly used in networking technologies, and they all rely on the transmission of electrical impulses to convey data across networks.

While light pulses are associated with fiber optic cables, electromagnetic waves are typical of wireless communication, and digital signals can be carried over both wired and wireless media but specifically in the context of metal wires, it is the electrical impulses that are primary for transmission.