Is it possible to have logical star topology?

Question

I looked at a few websites.
A couple of them say all 4 topology (bus, ring, star, mesh) and be both physical and logical.

But other sources say the only 2 logical topologies are bus and ring.

I don't know which statement is accurate.

Answer 1

You can have a logical star. An excellent example is MPLS which is also a logical mesh. You could call frame-relay a logical star as well though some would argue with me on that.

Answer 2

BUS topology: All devices are connected to a central cable, called the bus or backbone. Bus networks are relatively inexpensive and easy to install for small networks. Ethernet systems use a bus topology. RING topology : All devices are connected to one another in the shape of a closed loop, so that each device is connected directly to two other devices, one on either side of it. Ring topologies are relatively expensive and difficult to install, but they offer high bandwidth and can span large distances. STAR topology: All devices are connected to a central hub. Star networks are relatively easy to install and manage, but bottlenecks can occur because all data must pass through the hub.