Which statement is true about FSB?

Which statement is true about FSB?

• A. It is simplex
• B. It is duplex
• C. It is both
• D. It is neither

Answer: (A)

Understanding directionality of a bus is key. Simplex means signals travel in only one direction, while duplex means signals can go both ways. The Front Side Bus links the CPU with the chipset and memory controller, carrying addresses, control signals, and data back and forth as the CPU reads and writes memory. Because data and control information flow in both directions during operation, this bus is duplex. It isn’t a one-way path, so it isn’t simplex, and it isn’t neither or both in the sense of alternating single-direction behavior. The main takeaway is that two-way traffic defines a duplex bus.

Understanding directionality of a bus is key. Simplex means signals travel in only one direction, while duplex means signals can go both ways. The Front Side Bus links the CPU with the chipset and memory controller, carrying addresses, control signals, and data back and forth as the CPU reads and writes memory. Because data and control information flow in both directions during operation, this bus is duplex. It isn’t a one-way path, so it isn’t simplex, and it isn’t neither or both in the sense of alternating single-direction behavior. The main takeaway is that two-way traffic defines a duplex bus.