Correct option is A
In a star topology, computers are connected to a central hub or switch. This is one of the most common computer network topologies.
characteristics of a star topology:
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Central hub: A central hub, router, or switch is the common connection point for all the devices on the network. The hub manages and controls the network's functions, and acts as a repeater for data flow.
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Point-to-point connections: Each device is connected to the hub using a point-to-point connection.
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Data flow: Data passes through the hub before reaching its destination.
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Troubleshooting: Issues can be isolated to specific nodes or the central hub, making troubleshooting easier.
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Transmission line failure: The failure of a transmission line connecting a device to the hub isolates that device from the rest of the network, but doesn't affect the rest of the network.
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Commonly used cables: Star networks are commonly configured with twisted pair cable and optical fiber cable.
