lpic 2 linux professional institute certification study guide ebook

... Trang 1Practical LPIC-1 Linux Certification Study Guide — David Clinton Trang 2 Practical LPIC-1 Linux Certification Trang 3David Clinton Toronto, Canada ISBN-13 (pbk): 978-1-4842-2357-4 ISBN-13 ... 37472675276 Used Available Use% 123047744 325593964 Mounted on 28% / none /dev 7259121% /run 51200% /run/lock 35889642% /run/shm 1023441% /run/user /dev/sdb1 499008 3456 4955521% ... Boot Manager 21 Shared Libraries 21 Package Managers 23 Local: dpkg 23 Repositories: APT 24 Local: RPM 27 Repositories: yum 27 Trang 6■ CONTENTS Now Try This 28 Test Yourself 28 Answer Key

Ngày tải lên: 14/05/2018, 15:10

... Trang 1Practical LPIC-1 Linux Certification Study Guide — David Clinton Trang 2 Practical LPIC-1 Linux Certification Trang 3David Clinton Toronto, Canada ISBN-13 (pbk): 978-1-4842-2357-4 ISBN-13 ... real RAM Trang 37472675276 Used Available Use% 123047744 325593964 Mounted on 28% / none /dev 7259121% /run 51200% /run/lock 35889642% /run/shm 1023441% /run/user 4955521% /boot/efi ... 122 Test Yourself 122 Answer Key 123 ■ Chapter 9: Topic 109: Networking Fundamentals 125 Fundamentals of Internet Protocols 125 Transmission Protocols 125 Network Addressing 125 IPv4 126

Ngày tải lên: 04/11/2019, 07:47

... Securing Linux (ISBN: 1597492078), How to Cheat at Administering Office Communications Server 2007 (ISBN: 1597492126), Microsoft Forefront Security Administration Guide (ISBN: 1597492447), and ... technical editor for Security+ Study Guide and DVD Training System, (ISBN: 978-1-931836-72-2, Syngress), lead author and technical editor for Network+ Study Guide & Practice Exams: Exam ... Security Professionals, (ISBN: 978-1-59749-139-6), a contributing author to The Real MCTS/MCITP Configuring Microsoft Windows Vista Client Exam 70-620 Prep Kit, (ISBN: 978-1-59749-233-1, Syngress),

Ngày tải lên: 04/07/2014, 13:20

... January 18, 2038 22:14:07 The correct answer is A.The UNIX epoch is January 1, 1970 00:00:00 UTC On 32-bit systems, the date functions are only guaranteed to work until January 19, 2038 5 Internally ... find the time stamp for the current time tomorrow, you can-not simply look 24 hours in the future, as it might be 23 or 25 hours if you cross a day-light saving time boundary.strtotime()takes this ... this code will cause $tsto be set to -1, indicating an error: $ts = strtotime(“Fri, 9 Jan 2004 03:26:23 +0000 GMT”); strtotime()has become confused because two separate time zone offsets (+0000and

Ngày tải lên: 17/10/2013, 21:15

... PHP configuration directives Thus, the following <?php print “Testing 1 2 3” ?> is longer than <?= “Testing 1 2 3” ?> But not quite as portable Note, also, that there is a subtle difference ... your code will be well-written from the very start In this chapter, we’ll provide you with some guidelines on writing efficient code, debug-ging faulty scripts, and identifying bottlenecks when ... languages Answer D is incorrect because safe_modedoes not attempt to prevent database access Trang 2Debugging and Performance MAKING MISTAKES IS HUMAN, and so is fixing them In your day-to-day program-ming

Ngày tải lên: 24/10/2013, 12:15

... 271 IPP, 268 NetBT, 265–266 NNTP, 272 NTP, 274 POP, 270–271 RIP, 274 SMB, 267–268 SMTP, 270 SNMP, 274–275 Telnet, 269 WINS, 266–267 WinSock, 268–269 Networking topologies, logical, 14–24 centralized, ... 322–329 benefits of, 324–325 class A, 323, 324 class B, 323, 324 class C, 323, 324 considerations, 324–329 DHCP operations, 326–329 relay agents, 328–329 static and dynamic assignments, 325–326 ... 118–120 types and operation, 120 updating drivers of, 585–586 wireless, 649 Networking protocols, 278–279 advantages of, 576–577 DHCP, 269–270 DNS, 12, 273–274 FTP, 272–273 HTTP, 271–272 IMAP, 271

Ngày tải lên: 04/07/2014, 13:20

... Trang 2CompTIA Network+ Certification Study Guide Trang 3This page intentionally left blankTrang 4CompTIA Network+ Certification Study Guide Exam N10-004 2E Robert J Shimonski ... Network+ certification study guide / Robert J Shimonski [et al.] — 2nd ed p cm Includes index ISBN 978-1-59749-429-8 (pbk : alk paper) 1 Computer networks—Examinations—Study guides 2 Electronic ... Electronic data processing personnel—Certification I Shimonski, Robert TK5105.5.C6357 2009 004.6—dc22 200902129 Printed in the United States of America 1 2 3 4 5 6 7 8 9 0 Trang 6Contents About

Ngày tải lên: 04/07/2014, 13:20

... math co-processor) 80286 (16-bit processor) produced in 1982 ■ ■ 80386 (32-bit processor) produced in 1985 ■ ■ Trang 580486 (32-bit processor) produced in 1989.■ ■ Pentium (32-bit processor) produced ... addresses used to uniquely identify comput-ers on TCP/IP networks Using DNS, a number like 207.46.250.222 can be translated to a friendly domain name such as microsoft.com In 1984, DNS became part ... later) Web servers for the Internet Linus Torvalds used UNIX as the basis for developing Linux 20 years later Linux is open source, mean-ing that the code is available to use for free, and is the

Ngày tải lên: 04/07/2014, 13:20

... that it is scalable As the net-work grows or changes, computers FIGurE 1.4 A Star Topology. Trang 2are simply added or removed from the hub Unfortunately, because there is so much cabling that is ... of a WAN, and how could it be applied to this 1 network? What topology does the Paris firm use? 2 What topology does the Freedom Fry Corporation use? 3 On both networks, which networking component ... con-nection between the two offices The Paris firm uses a star topology, which has computers of the 2 network all connected to a single hub The Freedom Fry Corporation uses a wireless topology in

Ngày tải lên: 04/07/2014, 13:20

... home network that consists of one computer Q: running an Apple iMac and another running Windows 2000 Professional Each of them has network adapters installed already I want to network them together, ... Network card C T-Connector D Hub SElF TEST quICK ANSwEr KEy B 1 C 2 A 3 A 4 B 5 B 6 C 7 C 8 C 9 A and D 10 A 11 D 12 C 13 C 14 D 15 Trang 10ExAM oBJECTIvES IN ThIS ChApTEr INTroduCTIoN ... hub (which is cheaper than a router) using network cabling Being that security isn’t an issue, P2P networks are ideal in these situations My company wants to connect the LANs of an office in one

Ngày tải lên: 04/07/2014, 13:20

... thin (10Base2) or thick (10Base5) are two examples. The thin and thick kinds of coaxial cabling refer to the thickness of the cable. 10Base2 cabling, also known as Thinnet, is 0.25 in. while ... doesn’t suffer from the same problems. Although Table 2.2 Maximum Distance of Physical Media Media Standard Cable Type Maximum Length 10Base2 Coax 185 m 10Base5 Coax 500 m 10BaseT UTP or STP (Category ... varies depending on the media being used. Table 2.1 Bandwidth Capacity of Physical Media Media Standard Cable Type Bandwidth Capacity 10Base2 Coax 10 Mbps 10Base5 Coax 10 Mbps 10BaseT UTP or

Ngày tải lên: 04/07/2014, 13:20

... www.10gea.org. Trang 7ChApTEr 2: Network Media 72 10Base2, 10Base5, and Arcnet 10Base2 (also known as Thinnet) is a thin coaxial cable used on Ethernet net-works The cable used in 10Base2 is an RG-58 cable ... of 26 m and 82 m depending on the cable type It also supports distances of 300 m over a new 2000 MHz km MMF. 10GBaseLX4 that uses wavelength division mul-■ tiplexing and supports ranges of 240 ... drilled Table 2.3 Four-Pair Cable Color Code pair Solid wire Striped wire Table 2.4 Twisted-Pair Wire/Pin Placement pin wire 1 Orange and white 3 Green and white 7 Brown and white Trang 2or vertical

Ngày tải lên: 04/07/2014, 13:20

... cabling? Trang 10A 100 mB 185 m C 500 m D 2 km Examine the illustration shown in Figure 2.12 is a 10Base2 network, and it uses these connectors to attach to the network Which of the following ... cabling in each of the buildings, and connect the two buildings together using 10Base2 cabling FIGurE 2.12 ... up to 2 km in length 100BaseFX uses fiber-optic cabling to transmit data at speeds of ■ ■ 100 Mbps across cable segments that are up to 400 m in length with half-duplex communication or 2 km for

Ngày tải lên: 04/07/2014, 13:21

... in such a network? (Choose one.) FIGurE 2.13 Trang 2Self Test 97A RJ-11 B RG 58 C SC D BNC As a Network technician for 123 LLC, you are asked by your 12 CIO about the access method of Gigabit ... cable D A hardware loopback Trang 3ChApTEr 2: Network Media 98 SElF TEST quICK ANSwEr KEy B 1 A 2 B 3 D 4 B 5 B 6 D 7 C 8 C 9 A 10 C 11 B 12 C 13 C 14 D 15 Trang 4ChApTEr 3 ExAM ... hubs provide 24 or 28 ports and can be attached together (or more commonly referred to as uplinked FIGurE 3.1 Hubs Are Used in Star Topologies. Trang 7ChApTEr 3: Network Devices 102 or cascaded

Ngày tải lên: 04/07/2014, 13:21

... or 2.048 Mbps duplex on three twisted-pair lines 12,000 feet Symmetric digital subscriber line (SDSL) 1.544 Mbps 12,000 feet Very high digital subscriber line (VDSL) Downstream: 12.9 to 52.8 ... shows the implementations: H0 384 Kbps (6 B channels) ■ ■ H10 1472 Kbps (23 B channels) ■ ■ H11 1536 Kbps (24 B channels) ■ ■ H12 1920 Kbps (30 B channels) – Europe ■ ■ IsDN Interfaces Although ... (VDSL) Downstream: 12.9 to 52.8 Mbps upstream: 1.5 to 2.3 Mbps Speeds decrease over distance 4500 feet at 12.96 Mbps, 3000 feet at 25.82 Mbps, and 1000 feet at 51.84 Mbps Trang 6 signals From

Ngày tải lên: 04/07/2014, 13:21

... adapters that have been verified for use with a particular operating system (such as NT, 2000, 2003, 2008, Vista, and XP) Ensure that there is an open bus slot on the machine in which you ■ ■ ... line, you would have a 128 Kbps connection When only a portion of the T1 line is used, it is referred to as fractional T1 If more than 1.544 Mbps of bandwidth was Trang 2needed, a company could ... Windows XP Professional. Note that in Figure 3.4, LAN has an x This indicates that the connec-tion might have an issue, such as a disconnected RJ-45 connector on the NIC itself LAN2 is grayed

Ngày tải lên: 04/07/2014, 13:21

... VPN are Point-to-Point Tunnel-ing Protocol (PPTP), Layer 2 TunnelTunnel-ing Protocol (L2TP), SSH, and IP Secu-rity (IPSec) PPTP and L2TP are used to establish a secure tunnel connection between ... implemented site-to-site VPN tools on the Windows 2003 plat-form using either RRAS or the newest rendition of Microsoft’s proxy server, Microsoft ISA Server 2006 Whichever product or service is chosen, ... is sold to third parties that may send you advertisements, spam, or phone solicitations. Trang 2work interfaces This computer acts as a gateway between two networks The server’s routing capability

Ngày tải lên: 04/07/2014, 13:21

... Trang 4Self Test Quick Answer Key 169SElF TEST quICK ANSwEr KEy A 1 B 2 D 3 B 4 B 5 D 6 B 7 A 8 A 9 D 10 A 11 C 12 A 13 D 14 B 15 Trang 5This page intentionally left blankTrang 6ChApTEr ... mirroring C VLAN D Trunking You want to have computers in different buildings to be part of the 12 same broadcast domain, so that when a computer sends a broad-cast message, all of the computers ... telephones without needing to install additional power outlets? A PoE B STP C Trunking D VLAN Trang 2Self Test 167You have decided to implement redundant switches on your net-9 work that will enable

Ngày tải lên: 04/07/2014, 13:21

... the 2.4 to 2.4835 GHz frequency range employed by 802.11b, DSSS transmissions can be broadcast in any one of fourteen 22 MHz-wide channels The number of center-channel fre-quencies used by 802.11 ... example, North America allows 11 channels operating in the 2.4 to 2.4835 GHz range, Europe allows 13, and Japan allows 1 Because each channel is 22 MHz wide, the channels may overlap each other Of the ... contrast to Ethernet 802.3 networks, wireless networks defined by the 802.11 standard do not use CSMA/CD as a method to protect against data loss resulting from collisions Instead, 802.11 networks use

Ngày tải lên: 04/07/2014, 13:21

... used by 802.11b devices as a modula-tion technique However, 802.11g devices are able to automatically switch to QPSK to communicate with 802.11b devices 802.11g has advantages over 802.11a in ... devices from different vendors that use 128-bit or higher encryption Ieee 802�11a Despite its nomenclature, IEEE 802.11a is a more recent standard than 802.11b This standard defines wireless networks ... wireless networks that use the 5 GHz UNII bands 802.11a supports much higher rates of data transmission than 802.11b These rates are 6, 9, 12, 16, 18, 24, 36, 48, and 54 Mbps, although higher rates

Ngày tải lên: 04/07/2014, 13:21