1) What is the difference between a permanent address and a care-of address? Who assigns a care-of address?
2) What are the differences between message confidentiality and message integrity? Can you have confidentiality without integrity? Can you have integrity without confidentiality? Justify your answer.
3) From a service perspective, what is an important difference between a symmetric-key system and a public-key system?
4) Stateful packet filters maintain two data structures. Name them and briefly describe what they do.