In CSMA CD:
1) Before starting transmission of frame station sense COMPLETE carrier or only its connection point ?
example : if D is transmitting frame to E WIll A sense carrier as idle or busy
2) Lets take At time t = 5 Station A wants to send frame to B and Station D wants to send frame to E .
WIll it be possible simultaneously ?
Does detecting channel idle by two stations ALWAYS imply collision will happen ?