Which of the following is a bus mastering method? (Select TWO).
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A. B. C. D. E.AC.
Bus mastering is a technique used in computer architecture to enhance the efficiency of data transfer between various components of a computer system. When a device performs bus mastering, it takes control of the system bus and transfers data directly to the memory without involving the processor. This allows the processor to perform other tasks while data is being transferred.
The two options that describe bus mastering methods are:
A. A device transfers data directly to the memory. This option describes the concept of bus mastering where a device takes control of the system bus and transfers data directly to the memory without involving the processor. This improves system performance as the processor is free to perform other tasks while data is being transferred.
C. A device connects to another device without involving the processor. This option also describes the concept of bus mastering where a device takes control of the system bus and connects directly to another device without involving the processor. This allows for faster data transfer and improves system performance.
Option B describes a device that handles mediation between the northbridge and the processor. The northbridge is a chipset that connects the CPU to high-speed components such as memory and graphics cards. While this may improve system performance, it is not a bus mastering method.
Option D describes a device that transfers data to the processor and then on to the memory. This is not a bus mastering method as it involves the processor in the data transfer process.
Option E describes a device that handles mediation between the southbridge and the processor. The southbridge is a chipset that connects the CPU to lower-speed components such as USB and audio devices. While this may improve system performance, it is not a bus mastering method.
In summary, options A and C describe bus mastering methods where a device takes control of the system bus and transfers data directly to the memory or connects directly to another device without involving the processor.