cisco networking academy program blogspot

... 2003 2:53 PM Trang 6Cisco IOS Software Editing Commands 571 Router Command History .572 Cisco IOS Software Fundamentals .574 Operation of Cisco IOS Software 574 Cisco IOS Software Features ... Configuration Register Values 649 Displaying the Currently Running Cisco IOS Software Version 650 Managing Cisco IOS Software Images 651 Cisco IOS Software Naming Conventions 654 Managing Configuration ... Your Understanding 641 Chapter 14 Managing Cisco IOS Software 645 Stages of the Router Power-On/Boot Sequence 645 Locating and Loading Cisco IOS Software 646 Using the boot system

Ngày tải lên: 04/07/2014, 18:20

... Software allows the user to interface with the hardware In networking, web browsers and e-mail are the most commonly used software programs ■ Troubleshooting PCs is a necessary skill when working ... of a network device plug-in Software or a program that can easily be installed and used as part of a web browser Trang 1038 Chapter 1: Introduction to Networkingpower cord Connects an electrical ... three of the comcom-binations generate a 1 output, and one combination generates a 0 output The two networking operations that use Boolean logic are subnetwork masking and wildcard masking Masking

Ngày tải lên: 04/07/2014, 18:20

... shows a Cisco PIX Firewall 535 series, which is a dedicated network device Trang 290 Chapter 2: Networking FundamentalsFigure 2-33 Cisco PIX Firewall AAA Servers An AAA server is a server program ... Trang 896 Chapter 2: Networking FundamentalsFigure 2-42 Star Topology When a star network is expanded to include an additional networking device that is connected to the main networking device, ... many different topologies connected by networking devices It shows a network of moderate complexity that is typical of a school or small business Figure 2-40 Networking Topologies Bus Topology Ring

Ngày tải lên: 04/07/2014, 18:20

... 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,

Ngày tải lên: 04/07/2014, 18:20

... was sometimes referred to as Cheapernet. Figure 3-12 Coaxial Cable—Thinnet Trang 2130 Chapter 3: Networking MediaHowever, in both types of coaxial cable, the outer conductor must be carefully and ... method of performing a task For example, the OSI reference model standards help to ensure that networking devices around the world are compatible and will work together Many specifications exist ... 4-pair cable (Ethernet LANs) ■ 62.5/125µ fiber-optic cable (Ethernet LANs) Trang 4132 Chapter 3: Networking Media■ Coaxial cable (rarely used for new installations and expected to be removed from

Ngày tải lên: 04/07/2014, 18:20

... 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,

Ngày tải lên: 04/07/2014, 18:20

... unlicensed use by high-speed data communications devices Cisco has acquired 5-GHz technology and uses this frequency in new products, such as Cisco Aironet 1200 series, which is dual band, delivering ... a 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 ... limited distance ■ Spread spectrum—Medium cost and high data rates Limited to campus coverage Cisco Aironet products are spread spectrum ■ Broadband personal communications service (PCS)—Low

Ngày tải lên: 04/07/2014, 18:20

... 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

Ngày tải lên: 04/07/2014, 18:20

... 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

Ngày tải lên: 04/07/2014, 18:20

... 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

Ngày tải lên: 04/07/2014, 18:20

... 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,

Ngày tải lên: 04/07/2014, 18:20

... hardware and cabling can be reused Figure 4-36 Microsegmentation of the Network via Switches Wireless Networking Media A wireless network is an alternative method for connecting a LAN You don’t need ... the destination For two-way communication, each device requires a transmitter and a receiver Many networking device manufacturers build the transmitter and receiver into a single unit called a transceiver ... appropriate wireless network card installed The two most common wireless technologies used for networking are infrared (IR) and radio frequency (RF) IR technology has its weaknesses Workstations

Ngày tải lên: 04/07/2014, 18:20

... 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

Ngày tải lên: 04/07/2014, 18:20

... from the distribu-tion tap to the Cisco uBR905 router, following the instrucdistribu-tions in Step 4 Setting Up Console Connections To initially configure your Cisco device, you need to provide ... connec-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 ... lines 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

Ngày tải lên: 04/07/2014, 18:20

... 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

Ngày tải lên: 04/07/2014, 18:20

... errors within data packets or on the network In the CSMA/CD access method, networking devices with data to transmit over the networking media work in a listen-before-transmit mode (CS = carrier sense) ... wants to send data, it first must check to see whether the networking medium is busy The device must check whether there are any signals on the networking media After the device determines that the ... calculation Ethernet Operation When multiple stations (nodes) must access physical media and other networking devices, various media access control strategies are used This section briefly reviews

Ngày tải lên: 04/07/2014, 18:20

... 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

Ngày tải lên: 04/07/2014, 18:20

... Copyright â 2002 Cisco Systems, Inc. Vocabulary Exercise Chapter 7 Define the following terms as completely as you can. Use the online Chapter 7 or the Cisco Networking Academy Program: Second-Year ... Engineering Journal and Workbook, Vol. II, 2 nd Ed. Chapter 1 Copyright â 2002 Cisco Systems, Inc. Cisco Networking Academy Program: Engineering Journal and Workbook, Volume II, Second Edition Engineering ... architecture. When you finish the Chapter 3 online material and the print material in the Cisco Networking Academy Program: Second-Year Companion Guide, Second Edition, you should completely understand...

Ngày tải lên: 21/12/2013, 05:18

... 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,...

Ngày tải lên: 04/07/2014, 18:20

... 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 ... 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, ... 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,...

Ngày tải lên: 04/07/2014, 18:20