cisco networking academy program ccna ccnp download

... information before network transit ■ Networking devices are products that connect networks Hubs, switches, and routers interconnect devices within LANs, MANs, and WANs Networking devices function at ... security to the network ■ Various types of wireless networking devices provide services to computers and users accessing the network Common wireless networking devices include wire-less adapters, ... with its own cable When a star network is expanded to include additional networking devices that are connected to the main networking device, it is called an extended-star topology ■ In a ring topology,

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... inside this angle to be guided in the fiber core. Trang 3Fiber-Optic CablesFiber-optic cable is a networking medium that uses modulated light for data transmis-sions through thin strands of glass ... Many characteristics of fiber-optic media are superior to copper Every fiber-optic cable used for networking consists of two glass fibers encased in sep-arate sheaths One fiber carries transmitted ... LANs is tight-buffered multimode cable Loose-Tube Fiber Tight-Buffered Fiber Trang 9Other Optical Networking ComponentsMost of the data sent over a LAN is in the form of electrical signals But,

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... 20, 2003 2:53 PM 158 Chapter 3: Networking Media ■ 5 GHz—Recently, the FCC opened up the 5-GHz band for unlicensed use by high-speed data communications devices. Cisco has acquired 5-GHz technology ... reliable range of up to 25 miles. The Cisco Aironet 340 Wireless LAN Series can deliver 11-Mbps throughput because it operates in the 2.4-GHz frequency. Cisco has acquired 5-GHz technology and ... Time Domain Reflectometers (OTDRs). 1102.book Page 153 Tuesday, May 20, 2003 2:53 PM 154 Chapter 3: Networking Media These meters both test optical cable to ensure that the cable meets the TIA standards

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... Trang 1complements the Cisco Aironet 1200 Series 802.11a Access Point, providing a solution that combines performance and ... Ethernet-like data rate of 11 Mbps over DSSS FHSS does not support data rates greater than 2 Mbps Wireless Networking When the computer was first introduced to the world, it was affordable by only large corporations, ... technology have occurred The same is true on the connectivity side of the industry The various types of networking discussed earlier in this chapter have all involved physical connectivity The advantages

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... an omnidirectional antenna Trang 2170 Chapter 3: Networking MediaFigure 3-50 Omnidirectional Antenna Wireless Security The exponential growth of networking, including wireless technologies, has ... points and NICs The IEEE 802.11b requires 40-bit encryption keys However, many vendors, such as Cisco, support the optional 128-bit standard The main goals with WEP follow: ■ Deny access to the ... Authentication Dial-In User Service (RADIUS) ■ Lightweight Extensible Authentication Protocol (LEAP)—Cisco has developed a derivation of EAP based on mutual authentication called LEAP Mutual authenti-cation

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... wireless networking media involves certain electrical and mathematical concepts and terms, such as signal, wave, frequency, and noise Understanding this vocabulary is helpful when learning about networking, ... 4-3 Digital Signals Exponents and Logarithms As discussed in Chapter 1, “Introduction to Networking,” in networking, remember three important number systems: ■ Base 2 (binary) ■ Base 10 (decimal) ... Otherwise, the error rate on the network will be too high for the LAN or WAN connections to be useful Networking media is literally and physically the backbone of a network Inferior quality network

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... wireless LANs (that use the atmosphere, or space, as the medium), networking media confines network signals to a wire, cable, or fiber Networking media are considered Layer 1 components of LANs Computer ... exists at Layer 1 of the OSI reference model To under-stand the types of cabling used to cable networking devices, you need to underunder-stand the LAN physical layer implementation of Ethernet,

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... shows a GBIC, and Figure 4-22 shows a Cisco WS-X2931 Gigabit Ethernet Module with the GBIC out. Figure 4-21 Gigabit Interface Converter (GBIC) Figure 4-22 Cisco WS-X2931 Gigabit Ethernet Module

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... to as xDSL. The Cisco 800 series of fixed-configuration DSL routers provides enhanced security, low cost of ownership, proven reliability, and safe investment through the power of Cisco IOS Software ... telecommuters The Cisco 827-4V ADSL router has one ADSL interface, as shown in Figure 4-50, that can connect users to the Internet or to a corporate LAN via DSL Figure 4-50 Cisco 827-4V Router ... connectors are used to connect end-user devices and service providers Note that serial ports on Cisco routers use a proprietary 60-pin connector or smaller “smart serial” connector, which enables

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... tightened from the distribu- tion tap to the Cisco uBR905 router, following the instructions in Step 4. Setting Up Console Connections To initially configure your Cisco device, you need to provide a management ... tion directly to the device. For Cisco equipment, this management attachment is called a console port. The console port enables you to monitor and configure a Cisco hub, switch, or router. The ... With the demand for broad- band services, cable modem connection is becoming more popular. The Cisco uBR905 cable access router provides high-speed network access on the cable television system

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... had its reach extended to distances that make Ethernet a metropolitan-area and even a wide-area networking standard This section provides an overview of the Ethernet, including the history of ... protocols are all compatible IEEE Ethernet Naming Rules The term Ethernet refers to a family of networking technologies that include original Ethernet,Fast Ethernet,Gigabit Ethernet (or Gig-E), ... Organization for Standardization (ISO), the IEEE is a standards-making organization The manufacturers of networking equipment are not required to fully comply with all the specifications of any standard

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... Trang 1Figure 5-10 CSMA/CDNetworking devices are capable of detecting when a collision has occurred because the amplitude of the signal on the networking media increases (CD = collision ... (random and, therefore, different for each device), any device can attempt to gain access to the networking media once again When data transmission resumes on the network, the devices that were ... possible using switch technology, which is covered in greater depth in Chapter 6 Full-duplex switched networking technology increases performance because data can be sent and received at the same time

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... Segmentation For a networking professional, one important skill is the ability to recognize collision domains. Connecting several computers to a single shared-access medium that has no other networking ... widely used in dialup network connections and is the most familiar to the home user. It is a shared networking environment in which one device is connected to only one other device, such as connecting ... Indirectly Connected Networks Some networks are indirectly connected, meaning that some higher-layer networking devices or some geographical distance is between the two communicating hosts. Fig- ure

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... To reacquaint yourself with network topologies and networking media, refer back to Chapter 2, “Networking Fundamentals,” and Chapter 3, “Networking Media.” The timing, frame format, and transmission ... the station Lab Activity Waveform Decoding The purpose of this lab is to integrate knowledge of networking media; OSI Layers 1, 2, and 3; and Ethernet, by decoding a digital waveform of an Ethernet

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... part of the new IEEE 802.3ae standard However, it is very likely that some vendors of Ethernet networking equipment will allow Jumbo frames to be carried on Ethernet networks built using only ... Implementations Special WAN Applications;End-to-End Ethernet, TCP/IP Networks Trang 7The future of networking media is threefold: ■ Wireless (approaching 100 Mbps, perhaps more) ■ Optical fiber (currently

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... load, delay, and reliability to create a composite metric value This is covered in more depth in CCNA2 ■ Outbound interface—The interface that the data must be sent out to reach the final destination ... network or set of networks that are under the administra-tive control of a single entity, such as the cisco.com domain An autonomous system consists of routers that present a consistent view of routing ... the Internet, RIP uses hop count as its routing metric ■ Interior Gateway Routing Protocol (IGRP)—Cisco developed this IGP to address the issues associated with routing in large, heterogeneous networks

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... processes lying outside the scope of the TCP/IP model, such as spreadsheet programs, word processing programs, and banking terminal programs Additionally, the application layer provides a direct interface ... special application software Networking has had a great influence on the development of programs such as word processors, spreadsheets, presentation managers, database programs, graphics, and productivity ... Transfer Protocol (FTP) is designed to download files (received or gotten from the Internet) and upload files (sent or put to the Internet) The capability to upload and download files is one of the most

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... 162 highway analogy of bandwidth, 59 history of computer networking, 47–48 hold-down timers, 719 routing loop prevention, 733 holddowns (IGRP), 747 home networking applications, 52 hop count, 442, 534 horizontal ... 45 sneakernet, 44 file systems, verifying, 667–668 files, Cisco IOS Software naming conventions, 654–655 filtering, 356 final configuration procedures for Cisco routers, 603 finish phase of cable installation, ... tools, 919 terminating copper media, 936–938 trimout phase, 939–942 vertical cable, 932 Cisco IOS images, 576–577 Cisco uBR905 cable access router to cable system, 239–240 Ethernet, connector requirements,...

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... PM ii Cisco Networking Academy Program CCNA 1 and 2 Companion Guide Third Edition Cisco Systems, Inc. Cisco Networking Academy Program Copyright â 2003 Cisco Systems, Inc. Published by: Cisco ... Tuesday, May 20, 2003 2:53 PM Cisco Networking Academy Program CCNA 1 and 2 Companion Guide Third Edition Cisco Systems, Inc. Cisco Networking Academy Program Cisco Press 201 West 103 rd Street Indianapolis, ... Academy program, then you are not preparing with a Cisco trained and authorized Networking Academy provider. For information on the Cisco Networking Academy Program or to locate a Networking Academy, ...

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... educational needs of the internetworking community, Cisco Systems established the Cisco Networking Academy Program. The Networking Academy is a comprehensive learning program that provides students ... the Cisco Networking Academy Program is in the forefront of this transformation. This Cisco Press title is one of a series of best-selling companion titles for the Cisco Networking Academy Program. ... xxvii Introduction Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, Third Edition, supplements your classroom and laboratory experience with the Cisco Networking Academy Program, whose...

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