star topology

Alternatively referred to as a star network, star topology is one of the most common network setups. In this arrangement, every node connects to a central hub, switch or computer; the hub acting as a server and the peripheral devices as clients. A major disadvantage of this network topology is that if the central hub fails, all of the connected devices are disconnected. The visual example shows how this setup gets its name as it is shaped very much like a star
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