If there are modules in a network, than the number of cross point is in a network to interconnect modules. The total number of switches becomes large as increases.

In a crossbar switch, conflicts occur when two or more concurrent requests are made to the same destination device. These conflicting requests are usually handled on a predetermined priority basis.

The crossbar switch has the potential for the highest bandwidth and system efficiency. However, because of its complexity and cost, it may be cost effective for a large multiprocessor system.