Which device has internal storage in the form of a buffer?

A device that has internal storage in the form of a buffer is a computer's Random Access Memory (RAM). Buffers are used within RAM to temporarily hold data that is being transferred between two devices or processes, helping to manage differences in data processing rates. This allows for smoother performance during data processing and improves overall system efficiency. Other examples include network devices like routers, which use buffers to manage incoming and outgoing data packets.