CCNA 1 and 2 Companion Guide, Revised (Cisco Networking Academy Program) part 8

1102.book Page 39 Tuesday, May 20, 2003 2:53 PM Check Your Understanding 39 web browser A graphical user interface (GUI)-based hypertext client application, such as Internet Explorer or Netscape Navigator, used to access hypertext documents and other services located on remote servers throughout the WWW and the Internet. Check Your Understanding Complete all the review questions to test your understanding of the topics and concepts in this chapter. Answers are listed in Appendix C, “Check Your Understanding Answer Key.” 1. The connection to the Internet can be broken down into which of the following? A. Physical connection B. Logical connection C. Applications D. All of the above 2. What is the main circuit board of a computer? A. PC subsystem B. Motherboard C. Backplane D. Computer memory 3. What are PCMCIA slots? A. Slots used in laptops B. Slots used as expansion slots in all computers C. Expansion slots for a NIC D. Slots for certain specialized devices 4. What is a NIC? A. A WAN adapter B. A printed circuit board that provides network communication C. A card used only for Ethernet networks D. A standardized data link layer address 1102.book Page 40 Tuesday, May 20, 2003 2:53 PM 40 Chapter 1: Introduction to Networking 5. Which of the following is/are the resource(s) you need before you install a NIC? A. Knowledge of how the network card is configured B. Knowledge of how to use the network card diagnostics C. Capability to resolve hardware resource conflicts D. All of the above 6. Which number system is based on powers of 2? A. Octal B. Hexadecimal C. Binary D. ASCII 7. Match the following terms with their definitions: 1. Bit 2. Byte 3. kbps 4. MHz a. The smallest unit of data in a computer b. A standard measurement of the rate at which data is transferred over a network connection c. A unit of frequency; the rate of change in the state or cycle in a sound wave, alternating current, or another cyclical waveform d. A unit of measure that describes the size of a data file, the amount of space on a disk or another storage medium, or the amount of data being transferred over a network 8. What is the largest decimal value that can be stored in 1 byte? A. 254 B. 256 C. 255 D. 257 1102.book Page 41 Tuesday, May 20, 2003 2:53 PM Check Your Understanding 41 9. What is the decimal number 151 in binary? A. 10100111 B. 10010111 C. 10101011 D. 10010011 10. What is the binary number 11011010 in decimal? A. 186 B. 202 C. 218 D. 222 11. What is the binary number 0010000100000000 in hexadecimal? A. 0x2100 B. 0x2142 C. 0x0082 D. 0x0012 12. What is the hexadecimal number 0x2101 in binary? A. 0010 0001 0000 0001 B. 0001 0000 0001 0010 C. 0100 1000 0000 1000 D. 1000 0000 1000 0100 13. Which of the following statements is true of ping? A. The ping command is used to test a device’s network connectivity. B. Ping stands for packet Internet groper. C. The ping 127.0.0.1 command is used to verify the operation of the TCP/IP stack and the NIC transmit/receive function. D. All of the above 1102.book Page 42 Tuesday, May 20, 2003 2:53 PM Objectives Upon completion of this chapter, you will be able to Describe networking history Define and describe the features of a LAN, WAN, MAN, SAN, and data center technology Define and describe the functions, benefits, and technologies of VPNs Define physical and logical topologies Describe the benefits of the OSI reference model Discuss the functions of each of the seven layers of the OSI reference model Describe the basic process of communication among the layers of the OSI reference model Name the layers of the TCP/IP protocol model Describe the function of a repeater, hub, NIC, bridge, switch, and router Describe the function of a voice gateway, DSLAM, CMTS, and optical platform Describe the function of a firewall, AAA server, and VPN concentrator Describe the function of a wireless adapter, wireless access point, and wireless bridge Define the bus, star, extended-star, ring, hierarchy, mesh, and partial-mesh topologies 1102.book Page 43 Tuesday, May 20, 2003 2:53 PM Chapter 2 Networking Fundamentals This chapter introduces some of the terminology used by networking professionals and various types of computer networks. It explains how standards ensure greater compati-bility and interoperability among various types of network technologies. It also describes how the OSI reference model networking scheme supports networking standards. In addition, this chapter describes the basic functions that occur at each layer of the OSI model. As you work through this chapter, you learn about the basic functions that take place at each layer of the OSI model, which will serve as a foundation as you begin to design, build, and troubleshoot networks. Finally, this chapter describes various network devices as well as cabling physical and logical layouts. Be sure to look at this chapter’s associated e-Labs, Videos, and PhotoZooms, which you will find on the CD-ROM accompanying this book. These CD elements are designed to supplement the material and reinforce the concepts introduced in this chapter. Networking Terminology This section introduces the concept and history of the data network. It also discusses the basic features of the following types of networks: Local-area networks (LANs) Wide-area networks (WANs) Metropolitan-area networks (MANs) Storage-area networks (SANs) Data centers Intranets Extranets Virtual private networks (VPNs) ... - tailieumienphi.vn