Point-to-Point and Point-to-Multipoint
There are two popular layouts for topologies: they are either point-to-point or point-
to-multipoint. A point-to-point topology—also known as host to host—is one
system
connected directly to another system. In the past these systems would connect
directly through the serial ports with a null modem cable, but these days, you could
connect them using a crossover cable or a wireless connection