Assuming standard 1500 byte Ethernet max payloads: how many IPv4 fragments will be needed to transfer 2000 bytes of user data with a single UDP send? And, how do the 2000 bytes get split over the frags? Despite its conceptual elegance, RPC (Remote Procedure Call) has a few problems. Discuss any 3 of those in brief. Why is timestamping needed in real-time applications? This is in the context of Real-time Transport Protocol (RTP). Why does UDP exist? Would it not have been enough to just let user processes send raw IP packets? Explain how QUIC eliminates a couple of RTTs usually needed at the start of a secure web connection.