... SerialLine: Switched SerialIBMMainframe 11 02.book Page xxiii Tuesday, May 20, 2003 2:53 PM xxviiIntroduction Cisco Networking Academy Program CCNA1 and 2 Companion Guide, Third Edition,supplements ... from one number system to another. This chapter corre-sponds to the Module 1 content from the CCNA1 online curriculum. 11 02.book Page xxviii Tuesday, May 20, 2003 2:53 PM xxix■ Chapter 2, “Networking ... destination reliably and accurately. This chapter corresponds to the Module 11 content from the CCNA 1 online curriculum.■ Chapter 10 , “WANs and Routers,” introduces WAN devices, technologies, and standards....
... number to a hexadecimal number 11 02.book Page 4 Tuesday, May 20, 2003 2:53 PM 8 Chapter 1: Introduction to NetworkingFigure 1- 1 Central Processing UnitFigure 1- 2 Floppy Disk Drive■ Microprocessor—A ... Figure 1- 1).■ Floppy disk drive—Can read and write to floppy disks (see Figure 1- 2).■ Hard disk drive—Reads and writes data on a hard disk. The primary storage device in the computer. 11 02.book ... 11 02.book Page 2 Tuesday, May 20, 2003 2:53 PM xxxi■ Chapter 14 , “Managing Cisco IOS Software,” examines the stages of the router boot sequence. It also covers how to use a variety of Cisco...
... type. BBSs did not become widely used until the early 19 80s, and the transfer of 11 02.book Page 14 Tuesday, May 20, 2003 2:53 PM 16 Chapter 1: Introduction to Networkingdetermine if there is ... performs e-mail, file transfers, and other functions 11 02.book Page 17 Tuesday, May 20, 2003 2:53 PM 10 Chapter 1: Introduction to NetworkingFigure 1- 4 Expansion SlotMotherboard ComponentsThe motherboard ... and network (Layer 3) address. 11 02.book Page 15 Tuesday, May 20, 2003 2:53 PM 12 Chapter 1: Introduction to NetworkingNetwork Interface CardsAs shown in Figure 1- 6, a NIC is a printed circuit...
... signals that represent the 0s and 1s making up the data. If a discrepancy is found, that packet can be resent.More Information: Cyclical Redundancy Check (Continued) 11 02.book Page 78 Tuesday, May ... is an important piece of information that gets added. 11 02.book Page 75 Tuesday, May 20, 2003 2:53 PM Networking Models 73Figure 2 -17 Peer-to-Peer CommunicationData packets on a network ... of 1s and 0s (bits) for transmission on the medium (usually a wire) at Layer 1. Network devices such as hubs, switches, and routers work at the lowest three layers. Hubs operate at Layer 1, ...
... NIC.Figure 2-24 Network Interface Card 11 02.book Page 81 Tuesday, May 20, 2003 2:53 PM 88 Chapter 2: Networking FundamentalsFigure 2- 31 Cisco CMTS uBR10 012 Optical PlatformsSeveral optical platforms ... Cisco ONS 15 454 dense wave-length division multiplexing (DWDM) optical network system (ONS). The Cisco ONS 15 454 provides the functions of multiple network elements in a single platform. 11 02.book ... backbone of the Internet and run the IP protocol. 11 02.book Page 84 Tuesday, May 20, 2003 2:53 PM Networking Models 87Figure 2-30 Cisco DSLAM 610 0CMTSCable operators use a Cable Modem Termination...
... decisions regarding the best path for delivery of data on the network. 11 02.book Page 10 5 Tuesday, May 20, 2003 2:53 PM Summary 10 1■ A SAN provides enhanced system performance, is scalable, and has ... regenerate, amplify, and retime signals before sending them along the network. 11 02.book Page 10 1 Tuesday, May 20, 2003 2:53 PM 10 6 Chapter 2: Networking Fundamentalssegment In the TCP specification, ... topics and con-cepts in this chapter. Answers are listed in Appendix C, “Check Your Understanding Answer Key.” 11 02.book Page 10 6 Tuesday, May 20, 2003 2:53 PM 10 8 Chapter 2: Networking Fundamentals7....