1. What is a collision in a shared wired medium? When a sender detects a collision a during its transmission, what will the sender do? Why is a jam signal 32 bits? 2. What are the differences between a collision domain and a broadcast domain? Please show examples using hubs, bridges, switches, and routers in both cases. 3. If the collision happens again that k=1 (Note: Consider the value of k = when the collision happened, use the formula for k=k+1, in this case k =1+1 =2), What is the probability of collision? Show all your detail calculation in a table format. 4. What is the requirement of slot time in CSMA/CD to guarantee a sender can always detection any potential collision? Please explain your