Summarize what communications occur with the POP3 protocol. What data is communicated in this protocol? Do we need guaranteed delivery of data AND/OR in-order delivery of data for this application layer protocol? Cite your sources. Based on your judgment and research, would the communications from this application layer protocol require TCP or UDP or both? Why might your allocated protocol need the Layer 4 protocol or protocols you answered in Section 1 Q2? Explain your reasoning.