TAILIEUCHUNG - CCNA 1 and 2 Companion Guide, Revised (Cisco Networking Academy Program) part 29

Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, Revised part 29 is the Cisco approved textbook to use alongside version of the Cisco Networking Academy Program CCNA 1 and CCNA 2 web-based courses. The topics covered provide you with the necessary knowledge to begin your preparation for the CCNA certification exam (640-801, or 640-821 and 640-811) and to enter the field of network administration. | Page 249 Tuesday May 27 2003 9 01 AM Check Your Understanding 249 11. Which of the following media is used to interconnect the ISDN BRI port to the service-provider device A. CAT 5 UTP straight-through B. CAT 5 UTP crossover C. Coaxial D. Fiber optic 12 . What type of connector is used for DSL connection A. RJ-45 B. RJ-11 C. F D. DB-9 13. What type of connector is used to connect a router and a cable system A. RJ-45 B. RJ-11 C. F D. AUI 14 . What type of cable is used to connect a terminal and a console port A. Straight-through B. Rollover C. Crossover D. Coaxial Page 250 Tuesday May 20 2003 2 53 PM Objectives Upon completion of this chapter you will be able to Describe briefly the history of Ethernet Identify the IEEE standards Understand MAC addressing Identify the common fields of the data link layer frames Describe Media Access Control MAC Describe CSMA CD Understand the operation of Ethernet Identify different types of collisions Explain collisions collision domains and broadcast domains Identify the Layer 1 2 and 3 devices used to create collision domains and broadcast domains Discuss data flow and the problem with broadcasts Understand collisions and collision domains Understand broadcasts and broadcast domains Understand segmentation of a network and the devices used to create the segments I Page 251 Tuesday May 20 2003 2 53 PM Chapter 5 Ethernet Fundamentals Ethernet in its various forms is the most widely used local-area network LAN technology. Ethernet was designed to fill the middle ground between long-distance low-speed networks and specialized computer-room networks carrying data at high speeds for very limited distance. Ethernet is well suited to applications in which a local communication medium must carry sporadic occasionally heavy traffic at high-pack data rates. It was designed to enable sharing resources on a local workgroup level. Design goals include simplicity low cost compatibility fairness low delay and high

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