Answer Description
In a Mesh network topology every network node (router, switch, hub, etc) is connected to every other network node. If a connection breaks, the node can easily communicate with another through multiple existing connections. In reality this is too complex to implement in a large network, but it is still very common to see a hybrid network with several mesh style layers.
Wikipedia
A mesh network (or simply Meshnet) is a local network topology in which the infrastructure nodes (i.e. bridges, switches and other infrastructure devices) connect directly, dynamically and non-hierarchically to as many other nodes as possible and cooperate with one another to efficiently route data from/to clients. This lack of dependency on one node allows for every node to participate in the relay of information. Mesh networks dynamically self-organize and self-configure, which can reduce installation overhead. …
Mesh networking - Wikipedia, the free encyclopedia