Pure Aloha and CSMA. Which of the following statements is true about both Pure Aloha, and CSMA (both with and without collision detection? There can be simultaneous transmissions resulting in collisions. There can be times when the channel is idle, when a node has a frame to send, but is prevented from doing so by the medium access protocol. Pure Aloha and CSMA can achieve100%channel utilization, in the case that all nodes always have frames to send. Pure Aloha and CSMA can achieve100%utilization, in the case that there is only one node that always has frames to send