A Star
In star topology, the individual computers are at the points of a starlike layout of cables radiating from a file server.
If the server conks out, everyone in the network is out of luck. But then that could also happen in rare cases if a printed circuit board in a bus network became mischievous in the worst way.
Normally, computers on a star network can’t be more than perhaps 200 feet apart, and perhaps much less.
Corvus’s Constellation network uses the star.
Most multiuser systems—which I won’t call true networks—use the star arrangement to hook up the dumb terminals to their central brain.