Which bus carries memory addresses from the CPU to memory?

Which bus carries memory addresses from the CPU to memory?

• A. Address bus
• B. Data bus
• C. Control bus
• D. System bus

Answer: (B)

Memory addresses travel on the address bus from the CPU to memory. These lines carry the location the CPU wants to access, allowing memory to know exactly which cell to read from or write to. The address bus is usually unidirectional, going from the CPU to memory, because the memory doesn’t need to send addresses back. The width of this bus determines how many different addresses can be represented, which sets how much memory can be addressed. The data actually transferred between the CPU and memory uses the data bus, which carries the bits of data to or from memory once the location is specified. The control bus carries signals that coordinate the operation (like read or write commands and timing). The term system bus can refer to the overall collection of these lines, but the specific path that carries memory addresses is the address bus.

Memory addresses travel on the address bus from the CPU to memory. These lines carry the location the CPU wants to access, allowing memory to know exactly which cell to read from or write to. The address bus is usually unidirectional, going from the CPU to memory, because the memory doesn’t need to send addresses back. The width of this bus determines how many different addresses can be represented, which sets how much memory can be addressed.

The data actually transferred between the CPU and memory uses the data bus, which carries the bits of data to or from memory once the location is specified. The control bus carries signals that coordinate the operation (like read or write commands and timing). The term system bus can refer to the overall collection of these lines, but the specific path that carries memory addresses is the address bus.