3.1 Single-mode fiber, multimode fiber,copper
Cabling and Infrastructure: Media is the actual physical environment through which data travels as it moves from one component to another, and it connects network devices. The most common types of net-work media are twisted-pair cable, coaxial cable, fiber-optic cable, and wireless. Each media type has specific capabilities and serves specific purposes.
Twisted-pair cable: Twisted-pair is a copper wire-based cable that can be either shielded or unshielded. Twisted- pair is the most common media for network connectivity.
STP stands for Shielded Twisted Pair and UTP stands for Unshielded Twisted Pair.
Shielded Twisted Pair(STP): STP cables reduce electrical noise and electromagnetic radiation. In other words, they help to keep the signal steady, and reduce interference with other devices. Given below is a diagram showing a typical shielded twisted pair cable