A buffer is meant for :a) Preventing ...
A buffer is meant for providing temporary storage between CPU and I/O device.
A buffer is an area of memory that is used to temporarily store data while it is being transferred between different components of a computer system. It acts as a bridge between the central processing unit (CPU) and input/output (I/O) devices.
Why is a buffer needed?
When data is being transferred between the CPU and an I/O device, there can be a difference in the speed at which the two components can send and receive data. This speed difference can cause issues such as data loss or data corruption if not properly managed. A buffer helps to overcome these issues by providing temporary storage for the data.
Preventing data loss and corruption:
When data is transferred from an I/O device to the CPU, it is typically sent in chunks or packets. If the CPU is not ready to receive the data, it may be lost or corrupted. By using a buffer, the data can be temporarily stored until the CPU is ready to process it. This ensures that no data is lost or corrupted during the transfer.
Allowing asynchronous operation:
In many computer systems, the CPU and I/O devices operate asynchronously, meaning they can perform tasks independently of each other. A buffer allows for this asynchronous operation by storing data temporarily until the CPU is ready to process it. This allows the I/O devices to continue sending data at their own pace without having to wait for the CPU.
Reducing overhead:
Using a buffer can also help to reduce the overhead associated with data transfer. Instead of transferring data one byte at a time, which can be inefficient, the data can be transferred in larger chunks or blocks. This reduces the number of times the CPU and I/O devices need to communicate, improving overall system performance.
Conclusion:
In summary, a buffer is meant to provide temporary storage between the CPU and I/O devices. It helps to prevent data loss and corruption, allows for asynchronous operation, and reduces overhead in data transfer. By using a buffer, computer systems can efficiently transfer data between different components without encountering issues.