Performance prediction

A point-to-point communication link may be procured with a fair amount of confidence that the link circuitry and protocol will meet the design objectives. To estimate the line throughput (number of information bits correctly received divided by the time taken for transmission) several factors must be taken into account including: a)Data transmission rate.b)Transmission block size.c)Block overheads and other protocol factors.d)Line error rate.e)Number of blocks which must be retransmitted when an error occurs.f)Propagation delay.g)Modem turnaround and throughput delays.h)Delays and limitations within the computer/terminal interface circuits.i)Software-induced delays within the host computers.j)Transaction characteristics.