Các câu hỏi và tình huống trong cuốn sách này có nhiều khó khăn hơn so với những gì bạn sẽ kinh nghiệm về kỳ thi thực tế. Những câu hỏi không cố gắng để bao gồm chiều rộng hoặc chiều sâu hơn so với kỳ thi, nhưng chúng được thiết kế để làm cho chắc chắn rằng bạn biết câu trả lời. | 106 Chapter 4 Using DSL to Connect to a Central Site Q A The questions and scenarios in this book are more difficult than what you will experience on the actual exam. The questions do not attempt to cover more breadth or depth than the exam but they are designed to make sure that you know the answer. Rather than enabling you to derive the answer from clues hidden inside the question itself the questions challenge your understanding and recall of the subject. Hopefully mastering these questions will help you limit the number of exam questions on which you narrow your choices to two options and then guess. The answers to these questions can be found in Appendix A. 1. What are three things that can adversely affect DSL signals 2. CAP modulation divides voice from upstream and downstream data transmission. List the ranges of frequency for each of the three traffic types. 3. DMT modulation divides the signals into how many separate channels 4. If there is signal degradation or other quality impairments on the line what will DMT do to correct the situation 5. What are the two general categories of DSL implementations and what is the basic difference between them 6. What is the range of bandwidths available with ADSL offerings 7. What is and what are its advantages 8. In the establishment of a PPPoE session what options are typically implemented to overcome the security issues brought about in a traditional bridged environment 9. In the PPP architecture which portion of the protocol stack deals with link negotiation packet size and authentication 10. What is the purpose of the Discovery phase in PPPoE session initiation 11. During the Discovery phase what is the address in the Destination MAC Address field of the PPPoE frame 12. PPPoA uses what RFC to define operations for VC encapsulation Exam Topic List This chapter covers the following topics that you need to master for the CCNP ISCW exam Configure a Cisco Router as a PPPoE Client Describes the steps for .
