A file server is used as a central data store for a network of computers.

Rory sends data from his computer to a file server that is approximately 100 metres away. It is important that the data is transmitted accurately. Rory needs to be able to read data from and write data to the file server at the same time.

a i Use ticks (✔) to identify the most suitable data transmission methods for this application.

ii Explain why your answer to a i is the most suitable data transmission.

b Identify and describe two methods of error checking that can be used to make sure that the data stored after transmission is accurate.

Serial Method 1 Tick Parallel Method 2 Tick Simplex Half-duplex Duplex