Physical star topology

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The Physical Star Topology

In a physical star topology, all of the cabling extends from the attached devices (i.e., the LAN adapters) to a central point. This point of contact is a piece of equipment generically referred to as a hub. For many years, the physical star was the most popular form of LAN cabling in use. The embedded base of these older network environments is still huge.

Although physical stars most commonly implement unshielded twisted pair (UTP) or optical fiber, coaxial cable can also be used in this configuration. ARCnet was an example of a star-wired LAN that implemented coaxial cable. For many years, token rings were star wired using shielded twisted pair (STP). Despite these exceptions, UTP dominates the star-wired LAN.