1. To optimize reassembly, some versions of the Linux operating system send the last fragment of an IP datagram first, and then send the remaining fragments in order. Explain why sending the last...

1. To optimize reassembly, some versions of the Linux operating system send the last fragment of an IP datagram first, and then send the remaining fragments in order. Explain why sending the last fragment first does not work well with NAPT.

2. List the features of UDP.

3. What is the conceptual difference between IP and end-to-end protocols?

4. Calculate the size of the largest possible UDP message when using IPv4 and IPv6. (Hint: the entire UDP message must fit in an IP datagram.)