CCENT/CCNA ICND1 Official Exam Certification Guide - Chapter 17

WAN Configuration Chương này xem xét các chi tiết cấu hình để làm thế nào để cấu hình một vài trong số các loại mạng diện rộng (WAN) bao gồm trong chương 4, "nguyên tắc cơ bản của mạng WAN," và Chương 16, Phần đầu tiên của chương này xem xét "Khái niệm WAN. cho thuê dòng cấu hình bằng cách sử dụng cả cấp cao kiểm soát liên kết dữ liệu (HDLC) và Point-to-Point Protocol (PPP). Phần thứ hai của chương này cho thấy làm thế nào để cấu hình các Layer 3 tính năng cần thiết cho...
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CCENT/CCNA ICND1 Official Exam Certification Guide - Chapter 17 1828xbook.fm Page 539 Thursday, July 26, 2007 3:10 PM 17 CHAPTER WAN Configuration This chapter examines the configuration details for how to configure a few of the types of wide-area networks (WANs) covered in Chapter 4, “Fundamentals of WANs,” and Chapter 16, “WAN Concepts.” The first section of this chapter examines leased-line configuration using both High-Level Data Link Control (HDLC) and Point-to-Point Protocol (PPP). The second section of the chapter shows how to configure the Layer 3 features required for an Internet access router to connect to the Internet, specifically Dynamic Host Configuration Protocol (DHCP) and Network Address Translation/Port Address Translation (NAT/PAT). However, the configuration in the second half of the chapter does not use the command-line interface (CLI), but instead focuses on using the web-based router Security Device Manager (SDM) interface. For those of you preparing specifically for the CCNA 640-802 exam by using the reading plan in the introduction to this book, note that you should move on to Part IV of the CCNA ICND2 Official Exam Certification Guide after completing this chapter. “Do I Know This Already?” Quiz The “Do I Know This Already?” quiz allows you to assess if you should read the entire chapter. If you miss no more than one of these seven self-assessment questions, you might want to move ahead to the “Exam Preparation Tasks” section. Table 17-1 lists the major headings in this chapter and the “Do I Know This Already?” quiz questions covering the material in those headings so you can assess your knowledge of these specific areas. The answers to the “Do I Know This Already?” quiz appear in Appendix A. “Do I Know This Already?” Foundation Topics Section-to-Question Mapping Table 17-1 Foundation Topics Section Questions Configuring and Troubleshooting Point-to-Point WANs 1–3 Configuring and Troubleshooting Internet Access Routers 4–7 1828xbook.fm Page 540 Thursday, July 26, 2007 3:10 PM 540 Chapter 17: WAN Configuration Routers R1 and R2 connect using a leased line, with both routers using their respective 1. Serial 0/0 interfaces. The routers can currently route packets over the link, which uses HDLC. Which of the following commands would be required to migrate the configuration to use PPP? encapsulation ppp a. no encapsulation hdlc b. clock rate 128000 c. bandwidth 128000 d. Routers R1 and R2 have just been installed in a new lab. The routers will connect using 2. a back-to-back serial link, using interface serial 0/0 on each router. Which of the following is true about how to install and configure this connection? If the DCE cable is installed in R1, the clock rate command must be configured a. on R2’s serial interface. If the DTE cable is installed in R1, the clock rate command must be configured b. on R2’s serial interface. If the clock rate 128000 command is configured on R1, the bandwidth 128 c. command must be configured on R2. None of the answers are correct. d. Two brand new Cisco routers have been ordered and installed in two different sites, 100 3. miles apart. A 768-kbps leased line has been installed between the two routers. Which of the following commands is required on at least one of the routers in order to forward packets over the leased line, using PPP as the data link protocol? no encapsulation hdlc a. encapsulation ppp b. clock rate 768000 c. bandwidth 768 d. description this is the link e. When configuring a DHCP server on an Internet access router using SDM, which of 4. the following settings is typically configured on the Internet access router? The MAC addresses of the PCs on the local LAN a. The IP address of the ISP’s router ...