... educational needs of the internetworking community, Cisco Systems established the CiscoNetworkingAcademyProgram The NetworkingAcademy is a comprehensive learning program that provides students ... the CiscoNetworkingAcademyProgram Kevin Warner Senior Director, Marketing Worldwide Education Cisco Systems, Inc 11 02.book Page xxvii Tuesday, May 20, 2003 2:53 PM xxvii Introduction CiscoNetworking ... CiscoNetworkingAcademyProgram is in the forefront of this transformation This Cisco Press title is one of a series of best-selling companion titles for the CiscoNetworkingAcademy Program...
... and practice 11 02.book Page Tuesday, May 20, 2003 2:53 PM 11 02.book Page Tuesday, May 20, 2003 2:53 PM Part I CCNA 1: Networking Basics Chapter Introduction to Networking Chapter Networking Fundamentals ... (see 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 ... computer 11 02.book Page Tuesday, May 20, 2003 2:53 PM Chapter 1: Introduction to Networking Figure 1- 1 Central Processing Unit Figure 1- 2 Floppy Disk Drive ■ Microprocessor—A silicon chip that contains...
... connected Figure 1- 5 shows a PC card adapter for a wireless local-area network (WLAN) Figure 1- 5 PC Card 11 11 02.book Page 12 Tuesday, May 20, 2003 2:53 PM 12 Chapter 1: Introduction to Networking ... 11 02.book Page 10 Tuesday, May 20, 2003 2:53 PM 10 Chapter 1: Introduction to Networking Figure 1- 4 Expansion Slot Motherboard Components NOTE Some ... Desktop systems can use a built-in or adapter card-type NIC 13 11 02.book Page 14 Tuesday, May 20, 2003 2:53 PM 14 Chapter 1: Introduction to Networking Situations that require NIC installation include...
... dotted-decimal format, 10 .0.0.0 is the network portion of the IP address Example 2: Using the second mask (255.255.0.0): 000 010 10.0 010 0 010 .00 010 111 .10 00 011 0: IP address 11 111 111 .11 111 111 .00000000.00000000: ... Some examples of subnet masks follow Example 1: 11 111 111 .00000000.00000000.00000000 written in dotted decimal is 255.0.0.0 Example 2: 11 111 111 .11 111 111 .00000000.00000000 written in dotted decimal ... following examples: Example 1: Using the first mask (255.0.0.0): 000 010 10.0 010 0 010 .00 010 111 .10 00 011 0: IP address 11 111 111 .00000000.00000000.00000000: network mask 000 010 10.00000000.00000000.00000000...
... Subscriber Line (DSL) 51 110 2.book Page 52 Tuesday, May 20, 2003 2:53 PM 52 Chapter 2: Networking Fundamentals ■ Frame Relay ■ T (U.S.) and E (Europe) carrier series—T1, E1, T3, E3, and so on ■ ... communicate across great distances 11 02.book Page 51 Tuesday, May 20, 2003 2:53 PM Networking Terminology Figure 2-7 WAN Corporate Headquarters Dallas Branch Office San Francisco Branch Office Miami Using ... users are routed to an optimally located content engine 11 02.book Page 55 Tuesday, May 20, 2003 2:53 PM Networking Terminology Figure 2 -10 Data Center Content Delivery Web Hosting Services Content...
... layer on the destination computer, as shown in Figure 2 -17 11 02.book Page 73 Tuesday, May 20, 2003 2:53 PM Networking Models Figure 2 -17 Peer-to-Peer Communication Sender Receiver Network Application ... data-flow protocols Whereas the application, presentation, and session 71 110 2.book Page 72 Tuesday, May 20, 2003 2:53 PM 72 Chapter 2: Networking Fundamentals layers are concerned with application issues, ... to troubleshoot network problems if they occur during data packet flow 11 02.book Page 71 Tuesday, May 20, 2003 2:53 PM Networking Models OSI Layers and Functions Each OSI layer has a set of functions...
... amplify, and retime signals before sending them along the network 10 1 11 02.book Page 10 2 Tuesday, May 20, 2003 2:53 PM 10 2 Chapter 2: Networking Fundamentals ■ The term hub is used instead of repeater ... the Internet D Provide full-time connectivity to local services 10 7 11 02.book Page 10 8 Tuesday, May 20, 2003 2:53 PM 10 8 Chapter 2: Networking Fundamentals Which of the following statements best ... networking device that is connected to the main networking device extranet Intranet-based applications and services that employ extended, secure access to external users or enterprises 10 3 11 02.book...
... Au 10 9 11 0 11 1 Mt 59 60 61 62 63 Pr Nd Pm Sm Eu 91 92 93 94 95 Pa U Np Pu Am 30 Zn 48 Cd 80 Hg 11 2 64 Gd 96 Cm 65 Td 97 Bk B 13 Al 31 Ga 49 In 81 Tl 66 Dy 98 Cf C 14 Si 32 Ge 50 Sn 82 Pb 11 4 ... 11 4 67 Ho 99 Es N 15 P 33 As 51 Sb 83 Bi O 16 S 34 Se 52 Te 84 Po 11 6 68 Er 10 0 Fm F 17 Cl 35 Br 53 I 85 At 10 Ne 18 Ar 36 Kr 54 Xe 86 Rn 11 8 69 70 Tm Yb 10 1 10 2 Md No 71 Lu 10 3 Lr Atoms normally ... direction of a router D Switches perform Layer path selection 11 1 11 02.book Page 11 2 Tuesday, May 20, 2003 2:53 PM 11 2 Chapter 2: Networking Fundamentals 24 What does a router route? A Layer bits...
... Some Current Continuity Provides Resistance Wire Is Conductor 12 1 11 02.book Page 12 2 Tuesday, May 20, 2003 2:53 PM 12 2 Chapter 3: Networking Media The top of Figure 3-4 illustrates the flashlight ... distances A wire with an AWG size of 24 would be 1/ 24th of an inch in diameter 12 3 11 02.book Page 12 4 Tuesday, May 20, 2003 2:53 PM 12 4 Chapter 3: Networking Media Twisted-Pair Cable Twisted-pair ... which requires at least CAT 12 7 11 02.book Page 12 8 Tuesday, May 20, 2003 2:53 PM 12 8 Chapter 3: Networking Media Coaxial Cable Coaxial cable, as shown in Figure 3 -10 , consists of four main parts:...
... terminators: ■ 15 0 ohm STP 2-pair cable (Token Ring LANs) ■ 10 0 ohm UTP 4-pair cable (Ethernet LANs) ■ 62.5 /12 5 µ fiber-optic cable (Ethernet LANs) 13 1 11 02.book Page 13 2 Tuesday, May 20, 2003 2:53 PM 13 2 ... cable, and how fiber is tested to ensure that it functions properly 13 3 11 02.book Page 13 4 Tuesday, May 20, 2003 2:53 PM 13 4 Chapter 3: Networking Media The Electromagnetic Spectrum The light used in ... mirror The light that is reflected back is called the reflected ray 13 5 11 02.book Page 13 6 Tuesday, May 20, 2003 2:53 PM 13 6 Chapter 3: Networking Media The light energy in the incident ray that is...
... wavelength of light (850, 13 10, or 15 50 nm) generated by the transmitter at the far end of the fiber When 14 7 11 02.book Page 14 8 Tuesday, May 20, 2003 2:53 PM 14 8 Chapter 3: Networking Media struck ... cladding ■ A buffer ■ A strengthening material ■ An outer jacket 14 1 11 02.book Page 14 2 Tuesday, May 20, 2003 2:53 PM 14 2 Chapter 3: Networking Media Figure 3-23 Five Elements of a Fiber-Optic Cable ... communications, as shown in Figure 3- 21 Figure 3- 21 Light Wave Path Light must fall inside this angle to be guided in the fiber core n0 n1 11 02.book Page 14 1 Tuesday, May 20, 2003 2:53 PM Optical...
... problem of multiple paths that the light signal can follow Chromatic 11 02.book Page 15 1 Tuesday, May 20, 2003 2:53 PM Optical Media 15 1 dispersion, however, is a characteristic of both multimode and ... Optical Loss Meters and Optical Time Domain Reflectometers (OTDRs) 15 3 11 02.book Page 15 4 Tuesday, May 20, 2003 2:53 PM 15 4 Chapter 3: Networking Media These meters both test optical cable to ensure ... many—How many users can exist without slowing the data rate? 15 5 11 02.book Page 15 6 Tuesday, May 20, 2003 2:53 PM 15 6 Chapter 3: Networking Media These parameters all relate to the ability to...
... Spread Spectrum 11 0 11 0 0 Chipping Sequence 1 010 11 11 0 11 0 0 Number Received Number Sent Interference Transmitter Receiver 11 02.book Page 16 1 Tuesday, May 20, 2003 2:53 PM Wireless Networking ... 802 .11 b, called Wi-Fi or high-speed wireless, refers to DSSS systems that operate at 1, 2, 5.5, and 11 Mbps All 802 .11 b systems are backward-compliant in that they also support 802 .11 for 1- and ... 802 .11 standard is DSSS DSSS applies to wireless devices operating within a to Mbps range A DSSS system can operate at 16 1 11 02.book Page 16 2 Tuesday, May 20, 2003 2:53 PM 16 2 Chapter 3: Networking...