Set A, B two station 4 km apart, using the CSMA/CD protocol, the transmission of signals on the network speed is 2 x 10 ^ 8 m/s, two transmission speed is 100 megabits per second, A station to send data, in the event of collision, the fastest to send data (1) the first of A station after A long time to detect the collision happened? How long is the latest? (2) if A and B two station 2 km distance shortened, to guarantee the normal work of the network, the shortest frame length is how many?


The first problem is the fastest two transmission delay, what is the slowest?