1. For a 1-Gbps network operating over 5000 km, the delay is the limiting factor, not the bandwidth. Consider a Metropolitan Area Network (MAN) with the average source and destination 40 km apart. At what data rate does the round-trip delay due to the speed of light equal the transmission delay for a 1-KB packet? Determine the data rate to transmit a 1-KB data packet from source to destination.