Chapter 7 Reading Organizer - cnacad.com Discovery/Chapter 7/Discovery 3 Chap 7...Chapter 7 Reading...

Name _______________________________________________________ Date ________________

Chapter 7Reading Organizer

After completion of this chapter, you should be able to:

• Describe the features and benefits of common WAN connectivity options• Compare common WAN encapsulations and configure PPP• Describe Frame Relay

1. We have learned that the most common LAN technology is Ethernet. What technology do WANs commonly use? Define what this technology is.

2. Preparing the data for transmission on the WAN using digital lines requires a ___________________________ and a _______________________________. These two devices are often combined into a single piece of equipment called the ____________. This device integrates into the ____________________________ in the router. When using an analog connection, a _______________ is necessary.

3. What is a demarcation point?

4. What is meant by CPE?

5. What is the CO? (Explain)

CCNA Discovery Bill Link, CCNA, CCAIIntroducing Routing and Switching in the Enterprise Cisco Academy InstructorChapter 7 Implementing Enterprise WAN Links Cape Girardeau Career and Technology Center

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6. Explain what the “last mile” is:

7. The ________________ or modem controls the rate at which data moves onto the local loop. It also provides the _____________________ to the router. The ________________ is _____________________________(DCE). The router, which is responsible for passing the data to the DCE, is ________________________________ (DTE).

8. Explain X.21 and V.35:

9. Explain the following IN DETAIL:

a. DS0

b. DS1

c. DS3


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10.

11. Explain each of the following IN DETAIL with regard to Data-link Layer WAN standards:a. Physical addressing

b. Flow control

c. Encapsulation type

12. List and define three Layer 2 WAN protocols:a.

b.

c.


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13. Explain the following terms:a. Modulated

b. Carrier wave

c. POTS

14. Explain how the modem gets its name:

15. How many DS0s can a T1 line be split into?

16. Explain the concept of a fraction T1/E1 and a time slice:


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17. Define the following:

a. Time Division Multiplexing

b. Statistical Time Division Multiplexing

18. One type of WAN connection is a ______________________ serial link between two routers using a __________________________ leased line.

19. Explain each of the following IN DETAIL:a. Circuit Switching

b. Packet Switching

c. Cell Switching

d. ATM

20. What are Virtual Circuits (VC)?

21. List and explain in detail the two types of Virtual Circuits:


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22.

23. ISPs use several different WAN technologies to connect their subscribers. The connection type used on the _______________________________, or last mile, may _____________________ as the WAN connection type employed within the ISP network or between various ISPs.

24. List common “last mile” technologies:

25. What are two standards that allow the movement of large amounts of data over great distances through fiber-optic cables?

26. What is DWDM and what is its purpose?


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27.

5.2

28. The type of __________________ Layer encapsulation is separate from the type of Network Layer encapsulation. As data moves across a network, the _______________________ Layer encapsulation may change continuously, whereas the Network Layer encapsulation will not. If this packet must move across the WAN on its way to the final destination, the _______________________ encapsulation changes to match the technology in use.

29. How does a router act as a media converter as packets leave the LAN and enter the WAN?

30. The ___________________________________ must match on both ends of a point-to-point connection.

31. List the fields included in a data link encapsulation:


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32.

33. List and describe the two most common serial line Layer 2 encapsulations:

34. What extra field is included in a Cisco HDLC frame and what is the purpose of this field?

35. When should Cisco HDLC be used?

36. What is the default Data Link layer encapsulation type on Cisco serial links?

37. What Data Link layer encapsulation should be used to enable communication between equipment of different vendors?


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38. What interfaces can support PPP?

39. List and describe two sub-protocols of PPP:

40. List and describe IN DETAIL the options that are negotiated by Link Control Protocol:

41. List and describe the three phases that PPP sessions progress through:


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42.

43. On Cisco routers, HDLC is the default encapsulation on serial links. To change the encapsulation and use the features and functions of PPP, use the following command:

44. What two compression protocols are available in Cisco routers? (explain the difference between the two types)

45. What command would configure load balancing across multiple links?

46. When should compression be used and why?

47. When should compression not be used and why?


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48. What command displays the encapsulation and the states of the Link Control Protocol (LCP)?

49. What command indicates the state of the interface channels and whether a cable is attached to the interface?

50. What command verifies the incrementation of keepalive packets?

51. If keepalive packets and NOT incrementing, what might be the problem?

Lab 7.2.3.3 Configuring and Verifying a PPP Link

52. Authentication on a PPP link is optional. If configured, authentication when does authentication occur?

53. Define and describe the two possible types of authentication on a PPP link:

54. Describe what a relay attack is and how it is used to gain unauthorized access to a router:

55. Describe the CHAP authentication process in detail and explain why CHAP is a more secure authentication method than PAP:


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56.

Lab 7.2.5.3 Configuring and Verifying PAP and CHAP Authentication

5.3

57. What is Frame Relay?

58. How is Frame Relay similar to Ethernet and how does it differ?

59. Describe what a DLCI is and how it is similar to a MAC address:


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60. What is and LMI and what is its purpose in the Frame Relay network?

61. List and describe the three types of VC connection status information that LMIs provide:

62. When you subscribe to a Frame Relay service, you will negotiate certain levels of service with the service provider. One of these is the CIR. Explain this in detail:

63. You will also need to discuss something called the EIR with the service provider. Explain this in detail:

64. Explain the purpose of the DE bit in Frame Relay:

65. Explain the FECN bit and the BECN bit and how they are used by end devices in a Frame Relay network:


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66.


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Chapter 7 Reading Organizer - cnacad.com Discovery/Chapter 7/Discovery 3 Chap 7...Chapter 7 Reading...

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