HW1

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Begin working on HW1 as soon as possible. This assignment covers chapters 1 through 4 of the class textbook and the reading assignments on VPNs and IPv6 included in the folder with this assignment.

Refer to the assignment posted on blackboard to determine which problems should be completed.

Add your answers to this document (leave the questions here so that you can refer back to the assignment later and it will still be useful).

Please consider the other problems as additional material to study in preparation for exams. Answers to unassigned problems will not be graded, but you may include them if you so choose.

*************Only complete theEVENnumbered questions.**********

Ch1 ***

1. Explain what is meant by the following:

a. internetworking b. an "open" standard

2. Give three examples of application level Internet services.

3. Connectionless Packet Delivery Service and Reliable Stream Transport Service relate to which two protocols?

TCP UDP ICMP IP ARP RARP RIP

4. Place the following items in order from oldest to most recent:

a. Global Internet begins b. DARPA begins working on an internet technology c. 100,000,000 computers on the Internet d. TCP and IP protocols begin operating on ARPANET e. CSNet funded

5. What are the two subgroups of the IAB and what are those groups responsible for?

6. Why was IPv6 created?

Ch2 ***

7. What are two approaches to network communication?

8. Name some advantages of both of the above two approaches.

9. Name some disadvantages of both of the above two approaches.

10. What is a long haul network?

11. What do LAN technologies sacrifice in order to provide the highest speed connections among computers?

12. Name four network technologies that have been used in teh Internet (as explained in Ch. 2 of your text).

13. What is the common name for IEEE 802.3 and what are the two current versions of this known as?

14. What two 802.3 technologies are under development?

15. What is meant by "best-effort delivery semantics"?

16. Define the three types of 48-bit MAC addresses used by 802.3?

17. What is the de facto size for an Ethernet Frame?

18. What are the common names for 802.11 and 802.15.4?

19. Which of the above (prob. 12) is designed for lower power battery operated devices.

20. SONET uses _____________ which produces 8000 ____________, where each _______ is ________ bits.

21. What type of network is a leased circuit an example of?

22. From the point of view of Internet protocols a __________ is treated exactly like a separate ____________________.

23. Why are bridges considered adaptive or learning devices?

24. What can congestion lead to in Ethernet networks.?

Ch3 ***

25. What are two advantages of providing interconnection at the network level?

26. What are two fundamental observations about the design of communications systems?

27. What devices are used to interconnect different networks?

28. What do routers use when making decisions about how to forward packets?

Ch4 *** Sections 4.7 to 4.12

29. What are the five layers of the TCP/IP reference model?

30. What are two things that the protocol layering principle offers?

31. Identify two important boundaries in the 5-layer TCP/IP model and then identify their significance.

VPNs ***

32. What advantages do VPNs have when compared to traditional business remote access connectivity such as dedicated T1 lines and dial-up lines?

33. Explain the four critical functions that a VPN must provide so that is can offer acceptable security.

34. What two types of tunnel connections are usually set up to support VPNs and what is the main difference between these?

35. What advantages and disadvantages does L2F have when compared to PPTP?

36. What advantages does L2TP have when compared to PPTP and L2F?

37. What method does IPSec use to exchange cryptographic keys?

38. Explain the two "modes" that can be used with IPSec.

39. What advantages and disadvantages does IPSec have when compared to PPTP, L2F and L2TP?

40. What are the important pieces of an end-to-end VPN solution and what do these pieces do?

IPv6 ***

41. Sketch an IPv6 header and label the fields.

42. What are the main features and benefits of IPv6?

43. How does a workstation autoconfigure itself?

44. Why is renumbering an IPv6 network easier than an IPv4 network?

45. Explain the difference between anycast, multicast and unicast.

46. What is Path MTU Discovery and why is it needed?

47. Explain why Neighbor and Router Discovery are needed.