CCENT/CCNA ICND1 Official Exam Certification Guide - Chapter 9

Ethernet Switch Configuration Chương 3, "Nguyên tắc cơ bản của mạng LAN," và Chương 7 ", Ethernet LAN Chuyển đổi khái niệm", đã giải thích khái niệm phổ biến nhất của Ethernet LAN. Những chương giải thích tại sao Ethernet cáp và làm việc chuyển mạch, bao gồm các khái niệm như thế nào thiết bị chuyển mạch về phía trước khung Ethernet dựa trên khung điểm đến địa chỉ MAC. Cisco chuyển mạch LAN thực hiện các chức năng cốt lõi của họ mà không cần cấu hình bất kỳ. Bạn có thể mua một switch Cisco, cắm...
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CCENT/CCNA ICND1 Official Exam Certification Guide - Chapter 9 1828xbook.fm Page 231 Thursday, July 26, 2007 3:10 PM 9 CHAPTER Ethernet Switch Configuration Chapter 3, “Fundamentals of LANs,” and Chapter 7, “Ethernet LAN Switching Concepts,” have already explained the most common Ethernet LAN concepts. Those chapters explained how Ethernet cabling and switches work, including the concepts of how switches forward Ethernet frames based on the frames’ destination MAC addresses. Cisco LAN switches perform their core functions without any configuration. You can buy a Cisco switch, plug in the right cables to connect various devices to the switch, plug in the power cable, and the switch works. However, in most networks, the network engineer needs to configure and troubleshoot various switch features. This chapter explains how to configure various switch features, and Chapter 10, “Ethernet Switch Troubleshooting,” explains how to troubleshoot problems on Cisco switches. “Do I Know This Already?” Quiz The “Do I Know This Already?” quiz allows you to assess whether you should read the entire chapter. If you miss no more than one of these eight self-assessment questions, you might want to move ahead to the “Exam Preparation Tasks” section. Table 9-1 lists the major headings in this chapter and the “Do I Know This Already?” quiz questions covering the material in those sections. This helps you 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 9-1 Foundation Topics Section Questions Configuration of Features in Common with Routers 1–3 LAN Switch Configuration and Operation 4–8 1828xbook.fm Page 232 Thursday, July 26, 2007 3:10 PM 232 Chapter 9: Ethernet Switch Configuration Imagine that you have configured the enable secret command, followed by the enable 1. password command, from the console. You log out of the switch and log back in at the console. Which command defines the password that you had to enter to access privileged mode? enable password a. enable secret b. Neither c. The password command, if it’s configured d. An engineer had formerly configured a Cisco 2960 switch to allow Telnet access so 2. that the switch expected a password of mypassword from the Telnet user. The engineer then changed the configuration to support Secure Shell. Which of the following commands could have been part of the new configuration? A username name password password command in vty config mode a. A username name password password global configuration command b. A transport input ssh command in vty config mode c. A transport input ssh global configuration command d. The following command was copied and pasted into configuration mode when a user 3. was telnetted into a Cisco switch: banner login this is the login banner Which of the following are true about what occurs the next time a user logs in from the console? No banner text is displayed. a. The banner text “his is” is displayed. b. The banner text “this is the login banner” is displayed. c. The banner text “Login banner configured, no text defined” is displayed. d. Which of the following is not required when configuring port security without sticky 4. learning? Setting the maximum number of allowed MAC addresses on the interface with a. the switchport port-security maximum interface subcommand Enabling port security with the switchport port-security interface subcommand b. 1828xbook.fm Page 233 Thursday, July 26, 2007 3:10 PM “Do I Know This Already?” Quiz 233 Defining the allowed MAC addresses using the switchport port-security mac- ...