A network's logical topology is not necessarily the same as its physical topology.
From the en.wikipedia.org
The shape of the cabling layout used to link devices is called the physical topology of the network.
From the en.wikipedia.org
For example, the original twisted pair Ethernet using repeater hubs was a logical bus topology with a physical star topology layout.
From the en.wikipedia.org
Such overlays are used for indexing and peer discovery and make the P2P system independent from the physical network topology.
From the en.wikipedia.org
Peer-to-peer systems often implement an abstract overlay network, built at Application Layer, on top of the native or physical network topology.
From the en.wikipedia.org
Token Ring is a logical ring topology, but is wired a physical star from the Media Access Unit.
From the en.wikipedia.org
This abstraction allows any resource to be moved to a different physical location in the address topology of the network, globally or locally in an intranet.
From the en.wikipedia.org
Topology plays a central role in ensuring the robustness of a wide variety of physical phenomena.
From the nature.com
Note that the physical layout of the nodes in a network may not necessarily reflect the network topology.