Data and networking question:

a. Assume the only computer in the residence uses PPP to communicate with the ISP. If the user sends 10 network-layer packets to ISP, show the type and number of frames that are exchanged using CHAP for authentication. b. In a bus CSMA/CD network with a data rate of 10 Mbps, a collision occurs 20 mu s after the first bit of the frame leaves the sending station. What should the length of the frame be so that the sender can detect the collision