Networks transmit files between devices.
State two pieces of information needed to calculate the time taken to transmit a file across a network.
Mark scheme
Award one mark for any of the following up to a maximum of two marks:
- The size of the file / amount of data to be transmitted (1)
- The file size in bits/bytes/MB/GB (1)
- The transmission rate / speed of the network (1)
- The bit rate / number of bits per second (1)
- The network speed / connection speed (1)
Award a maximum of one mark for the file size/amount of data and a maximum of one mark for the transmission rate/speed/bit rate.
Do not accept bandwidth on its own.
Do not accept the time taken, as this is what is being calculated.
Do not accept latency (it is a delay, not a transmission rate).
Do not accept a conversion factor such as 8 bits per byte as one of the two pieces.
Example answers and how they were marked
The size of the file and the transmission rate of the network
Why: File size/amount of data (1) and transmission rate/speed of the network (1).
The size of the file and the time taken
Why: File size (1); time taken is what is being calculated and is not accepted (0).
The bandwidth and the latency
Why: Bandwidth is not accepted on its own (0); latency is a delay, not a transmission rate (0).