pc hardware and software companion guide third edition

... USA www.it-ebooks.info ii IT Essentials: PC Hardware and Software Companion Guide IT Essentials: PC Hardware and Software Companion Guide Third Edition Publisher Paul Boger Associate Publisher Dave ... Introduction IT Essentials: PC Hardware and Software Companion Guide, Third Edition, is a supplemental book to the Cisco Networking Academy IT Essentials: PC Hardware and Software version course ... along with its companion IT Essentials: PC Hardware and Software Labs and Study Guide, Third Edition (ISBN 1-58713-198-6), you can reinforce those concepts with hands-on exercises and test that...

Ngày tải lên: 05/05/2014, 11:35

... Enterprise and Standard x64 Editions, Windows Server 2003 R2, Enterprise and Standard x64 Editions (supports Service Pack and earlier) X Windows Server 2008, Datacenter, Enterprise, Standard, and Web ... and Standard x64 Editions (supports Service Pack and earlier) 5.20.2 Service Update and later: Windows Server 2008, Datacenter, Enterprise, Standard, and Web Server Editions 22 IBM Director Hardware ... Director Hardware and Software Support Guide Chapter Supported hardware IBM Director Agent is licensed for use and supported in a large range of IBM systems and products These systems and products...

Ngày tải lên: 31/03/2014, 16:20

... choices? Only hardware is necessary to make up a computer system Software alone doesn’t constitute a computer system A computer system needs both hardware and software to be complete II Understanding ... peripherals d physical electronic and electromagnetic devices systems software e hardware plus software applications software f hardware/ software packages turnkey systems CPU g used for a specific job ... system depends on the proper mixture of hardware and software There are two parts to a computer system Computer software can be divided into two parts The software is the programs The peripheral...

Ngày tải lên: 21/12/2013, 20:15

... then learn how to create and delete roles, grant and revoke privileges, and grant and revoke roles Part II: Data Access and Modification Part II explains how to access and modify data in an SQL ... maintenance of web-based and clientserver applications and the databases that supported those applications He has designed and implemented various Access and SQL Server databases and has used SQL to ... databases, create and modify database objects, query and modify data, and troubleshoot system- and data-related problems Robert has also written or cowritten eight books on various network and server...

Ngày tải lên: 20/02/2014, 11:20

... Command 142 security-level Command 143 nameif Command 144 ip address Command 145 nat Command 146 Configuring Port Address Translation 147 speed Command 148 duplex Command 148 nat-control Command ... Command 291 igmp join-group Command 291 igmp access-group Command 292 igmp version Command 292 igmp query-interval Command 292 pim Command 292 pim rp-address Command 293 pim dr-priority Command ... Install and configure a Security Appliance for basic network connectivity Describe the Security Appliance hardware and software architecture Chapters and Determine the Security Appliance hardware and...

Ngày tải lên: 03/06/2014, 01:40

... Australia, and Asia, Wiley is globally committed to developing and marketing print and electronic products and services for our customers’ professional and personal knowledge and understanding The ... work! M F For Shari, Virginia, and Armando F A ADDITIONAL PRAISE FOR FINANCIAL STATEMENT ANALYSIS, THIRD EDITION “With a solid understanding of accepted accounting standards, one must peel through ... Statement analysis A Practitioner’s Guide Third Edition MARTIN FRIDSON FERNANDO ALVAREZ John Wiley & Sons, Inc Copyright © 2002 by Martin Fridson and Fernando Alvarez All rights reserved Published...

Ngày tải lên: 27/06/2014, 16:20

... the bonding atoms is the bond axis, whose length is the bond length a and S and S and P P ( a ) o Bonding and ’ i and S and P P O*@P) ( )o*Antibonding Fig 2-2 Two parallel p orbitals overlap ... undergraduate and doctoral levels He received the Outstanding Teacher award in 1985, and has coauthored eight textbooks, three laboratory manuals in General and Organic Chemistry, and 15 papers ... , and [A] and [B] are molar concentrations Exponents x and y may be integers, fkactions, or zero; their sum defines the order of the reaction The values of x and y are found experimentally, and...

Ngày tải lên: 29/06/2014, 06:20

... (Internet Explorer), 17 IEEE (Institute of Electrical and Electronic Engineers), 130, 252 goals of, 255 IEEE 802.11b standard, 162 IEEE 802.3 standard See also Ethernet Ethernet naming conventions, ... 415–417 RARP assignment, 412–414 static assignment, 408 comparing IPv4 and IPv6, 405 ip classless command, 731–732 ip route command, 682 IPv4, 392–394, 406 address classes, 394–397 versus IPv6, 404–406 ... ACLs, defaults, 863–867 naming conventions Cisco IOS Software, 654–655 optical, 88 Ethernet, 253 naming routers, 595–596 narrowband, 169 narrowband interference, 159, 190 NEC (National Electrical...

Ngày tải lên: 04/07/2014, 18:20

... Page ii Wednesday, May 21, 2003 11:31 AM ii Cisco Networking Academy Program CCNA and Companion Guide Third Edition Cisco Systems, Inc Cisco Networking Academy Program Copyright © 2003 Cisco ... Time and Frequency 189 Analog and Digital Bandwidth 190 Signals and Noise on Networking Media 191 Signaling over Copper and Fiber-Optic ... LAN Organization and Standards 161 Wireless Devices and Topologies 162 How Wireless LANs Communicate 165 Authentication and Association ...

Ngày tải lên: 04/07/2014, 18:20

... IOS Software Editing Commands 571 Router Command History .572 Cisco IOS Software Fundamentals .574 Operation of Cisco IOS Software ... 587 Command-Line Interface Command Modes 587 User Command List 587 Privileged Mode Command List 589 ... 306 Check Your Understanding 309 Chapter Ethernet Technologies and Ethernet Switching 315 10-Mbps and 100-Mbps Ethernet ...

Ngày tải lên: 04/07/2014, 18:20

... 2:53 PM xxvii Introduction Cisco Networking Academy Program CCNA and Companion Guide, Third Edition, supplements your classroom and laboratory experience with the Cisco Networking Academy Program, ... tracking, hands-on labs, instructor training and support, and preparation for industry-standard certifications The Networking Academy continually raises the bar on blended learning and educational ... 2:53 PM xxiv Command Syntax Conventions The conventions used to present command syntax in this book are the same conventions used in the Cisco IOS Software Command Reference The Command Reference...

Ngày tải lên: 04/07/2014, 18:20

... recommendations, and general guidelines on how to use ACLs, and includes the commands and configurations needed to create ACLs Finally, this chapter provides examples of standard and extended ACLs and tells ... customer and employee accounts They use spreadsheet software to organize financial information, word processor software to maintain records and correspondence, and browsers to access internal and external ... Testing and Cabling LANs and WANs Chapter Ethernet Fundamentals Chapter Ethernet Technologies and Ethernet Switching Chapter TCP/IP Protocol Suite and IP Addressing Chapter Routing Fundamentals and...

Ngày tải lên: 04/07/2014, 18:20

... configured, including jumpers and plug -and- play software Most modern NICs not require jumpers and are plug -and- play, requiring little or no configuration They can be configured using software that comes ... between desktop PCs and laptops, other than the fact that laptop components are smaller than those found in a PC, is that laptops offer more mobility and portability than desktop PCs The expansion ... 2:53 PM PC Basics ■ Type of system bus—There are different types of system buses, such as PCI and ISA Because PCI slots are faster than ISA slots, the latter are being phased out NIC and Modem...

Ngày tải lên: 04/07/2014, 18:20

... binary and decimal number systems, the hexadecimal system is based on the use of symbols, powers, and positions The symbols that hex uses are through and A through F Table 1-6 shows the binary and ... per second This is a standard measurement of the amount of data transferred over a network connection ■ kBps (kilobytes per second)—One thousand bytes per second This is a standard measurement of ... 7, 8, and Combinations of these digits can represent all possible numeric values, as documented in Table 1-3 NOTE PC processors are getting faster all the time The microprocessors used in PCs in...

Ngày tải lên: 04/07/2014, 18:20

... Three combinations generate a 0, and one combination generates a The AND operation is used extensively with IP addressing and subnet masks Table 1-8 AND Operation AND 0 1 The OR operation, as shown ... bit at a time, using the AND process, and record the result The combination of a IP address bit and a mask bit is a The combination of a and a is a The combination of a and a is a To better demonstrate, ... Association (PCMCIA) An organization that has developed a standard for small credit card-sized devices called PCMCIA cards (or PC cards) Originally designed to add memory to portable computers, the PCMCIA...

Ngày tải lên: 04/07/2014, 18:20

... the latest wireless, DSL, and cable technologies People also are integrating PC, telephone, and fax capabilities, allowing for automatic answering and message storage and retrieval via computer ... unlimited bandwidth over a long period of time For WAN connections, it is almost always necessary to buy bandwidth from a service provider In either case, an understanding of bandwidth, and changes ... buy ■ Bandwidth is a key factor in analyzing network performance, designing new networks, and understanding the Internet—A networking professional must understand the tremendous impact of bandwidth...

Ngày tải lên: 04/07/2014, 18:20

... services and the bandwidth associated with each Table 2-4 WAN Services and Bandwidths WAN Service Typical User Bandwidth Modem Individuals 56 kbps = 0.056 Mbps DSL Individuals, telecommuters, and ... media types, along with their limits on distance and bandwidth Table 2-3 Maximum Bandwidths and Length Limitations Maximum Theoretical Maximum Medium Bandwidth Physical Distance 50-ohm coaxial cable ... to make it easier to understand the concept of bandwidth Digital Bandwidth Measurements In digital systems, the basic unit of bandwidth is bits per second (bps) Bandwidth is the measure of how...

Ngày tải lên: 04/07/2014, 18:20

... layer is encryption and decryption The common Layer graphic standards are PICT, TIFF, and JPEG Examples of Layer standards that guide the presentation of sound and movies are MIDI and MPEG Layer 5: ... smaller, simpler parts ■ It standardizes network components to allow multiple-vendor development and support ■ It allows different types of network hardware and software to communicate ■ It prevents ... some not Lab Activity OSI Model and TCP/IP Model In this exercise, you describe and compare the layers of the OSI and TCP/IP models You also name the TCP/IP protocols and utilities that operate at...

Ngày tải lên: 04/07/2014, 18:20

... Fundamentals Voice, DSL, Cable Modem, and Optical Devices Recent networking demands of voice and data network integration and fast data transmission for end users and network backbones have resulted ... switches forward and flood traffic based on MAC addresses Because switching is performed in hardware, it is significantly faster than the switching function performed by a bridge using software Think ... segments—one host per segment Each host receives instant access to the full bandwidth and does not have to compete for available bandwidth with other hosts In full-duplex switches, because only one device...

Ngày tải lên: 04/07/2014, 18:20