Different types of networking cables are used to connect different devices. In networking, the most common cables include coaxial cable, twisted pair, optical fiber, and parallel/serial cables. Their uses depend on the network topology, hardware, software, and network size. Networking cables, connectors, and their specifications belong to the physical layer or layer one of the OSI Model. Today my topic is twisted pair cables used in the Ethernet network, specifically, UTP vs STP, solid-core vs stranded cable, and different categories and classes of twisted-pair cables.