上QQ阅读APP看书，第一时间看更新
Network medium
Depending on whether it is a physical medium (cable) or a wave-based communication (wireless), mainly the following networking mediums for data transferring and communication are used:
- Metallic mediums, copper wires in twisted pairs and coaxial cables transmit electrical impulses
- Glass mediums, fibre optic cable transmit pulses of light
- Air mediums, waves and rays from the electromagnetic spectrum transmit signals in different frequencies
You can learn more about computer network mediums at https://www.techwalla.com/articles/types-of-media-used-in-computer-networking.