Difference between star and mesh topology?

Answer 1

1.The star topology use a hub in the center, only one hub. So all data exchange will go throught that one hub/router to reach another computer .If the hub is down, all the network is down too. In a mesh topology, each computer in the network has its own hub/or itself, so data exchange is done directly from one computer/or its hub, to another computer/or its hub, this is more secure since only one computer will be down in a case of problem with the interface(hub/itself[network card])

2. Star topology has minimal line cost because only n-1 lines are required for connecting n nodes while mesh topology is the most expensive network from the point of view of link cost.If there are n nodes in a network. n(n-1)/2 links are required. Hence, cost of linking the system grows with square of the number of nodes.

3.In star topology communication is not very fast between any two nodes while in mesh topology communication is very fast between any two nodes.