Discuse the relative merits de merits of single two three bus structure
A multiple bus structure (two or three tier) provides better performance as more data can be moved and faster. However, such systems are much more expensive to acquire and maintain than single bus systems.
Answering "http://wiki.answers.com/Q/How_much_number_of_units_communicate_in_a_single_bus_structure"
A single decker bus has 75 seats.
8 Devices can be used on a single SCSI bus.
Yes, the address bus is uni-directional.
bus is long
Obviously a computer needs a bus as none of them can drive!
Compared to single-bus architecture, the using of multiple-bus architecture have a great advantage in speed and of course, will affect performance also. Instead of using single-bus architecture, it is more convenient to use multiple-bus architecture. Using multiple-bus architecture will make each device to connect to own bus, which means that each device will have its own bus. This way, it will be faster to transfer data of each devices, so the data transfer doesn't have to stuck like in the single-bus architecture where many devices are connected to a single-bus, that will eventually reach the capacity of the bus and thus will make the data "queue". Of course, it will cost more to have multiple bus, but the cost will not match the need of faster speed, compared to the one of that single-bus architecture.
Bus sizes vary, as will the number of seats.
Multiple bus structure permit several devices to work simultaneously, therefore improving the computer's speed. In addition, it isolate processor from I/O traffic and support wider variety of interfaces.
i believe its about $2