Problem #1 (a) Multipath arises when multiple copies of different sources arrive at the intended receiver? (2 pts for correct answer + 3 pts for correct explanation) (b) Ping that relies on ICMP echo request/reply messages uses TCP as the transport layer to achieve reliable communication? (2 pts for correct answer + 3 pts for correct explanation) (c) Explain what is meant by the term protocol? Why is it important to have standardized protocols for communication over the Internet? (5 pts) (d) Distinguish between the transport layer and the network layer functions? (5 pts) (e) Explain the rationale behind using circuit switching for voice transmission but packet switching for data transfer? (5 pts)