1. Let A, B, and C be three subsequent nodes, A and C are attempting to transmit on 100 Mbps Ethernet. The exponential back off base unit is T = 512-bit times. The propagation delay between two nodes is equally divided into 210-bit times. Assume A and C send Ethernet frames at the same time at t = 2 s , while B remains silent, the frames collide, and then A and C choose different values of K in the CSMA/CD algorithm, KA = 2, KC = 3. At what times in seconds does A and C schedule its retransmission after the collision? (Assuming after the collision is detected; a node will abort the Ethernet frame transmission and transmit a jamming signal and then go to the exponential back off. It also senses the idle channel for 96-bit times before it transmits).
2. Calculate the length of the ethernet link from node A to node C?