a certification study guide pdf download

... that use the same frequency within a  small space can easily cause network disruptions and even denial of service (DoS) for valid network users. If an attacker hijacks the AP and does not pass ... and purchase new hardware, check to see if you can update the firmware of your AP. The AP vendor may have released a more recent firmware version that supports the disabling of SSID broad- casts. ... contains a high percentage of well-known and predictable information, making it vulnerable to plaintext attacks. How can I prevent unauthorized users from authenticating and as-Q: sociating

Ngày tải lên: 04/07/2014, 13:21

... space available to them, network engineers, manag- ers, administrators, and technicians would have a lackadaisical attitude when assigning IP space. Quite the contrary (as was learned earlier ... their addressing to the APIPA range. Think about this chapter and what you have learned so far and how it all ties together. All nodes on a subnet have to be in the same IP address range to ... application layer gate- way such as a proxy server, or it must have its address translated into a legal, public address. A process called NAT performs this translation before sending data out to

Ngày tải lên: 04/07/2014, 13:21

... corporate networks that do wish to adopt IPv6 sooner rather than later and may make migration more attractive for others as well. The 6to4 Protocol is installed on a router that serves as a gate- ... physical MAC addresses. ARP discovers this information by way of broadcasts, and keeps a table of IP-to-MAC entries. Test Day Tip Remember that routers, whether they are dedicated hardware devices ... send data from your computer to your company’s national headquarters in New York over a packet-switched network, each individual packet, or chunk of data, can take a different physical route

Ngày tải lên: 04/07/2014, 13:21

... HTTP allows Exam Warning SNMP management software is not currently included with the Windows operating system and has to be purchased and installed separately. Exam Day Tip Because it usually ... points. What is a gateway, and why would I need one?Q: The word A: gateway has many different meanings in the Information Technology (IT) world. A protocol-translating gateway translates between ... the last time you were able to do so? To make a diagnosis or analysis of the information, you must organize it in a logical manner. This means learning to sift through and discard irrelevant

Ngày tải lên: 04/07/2014, 13:21

... 802.10a SILS Part A: The Model 802.10b SILS Part B: Secure Data Exchange. Standard on protocol for secure data exchange at Data Link Layer 802.10c SILS Part C: Key Management. Standard on the management ... cell area to another without changing frequency, unless for some reason the cells operate on the same frequency and have no overlap of coverage area. Exam Warning IEEE standards are an important ... locations in a MAN 802.6m Subnetwork of MAN 802.7 Recommended Practices for Broadband LAN. Provides recommendations for the physical, electrical, and mechanical practices of broadband coaxial

Ngày tải lên: 04/07/2014, 13:21

... increase the distance that data can travel along the cable. D. Install a switch to increase the distance that data can travel along the cable. Correct answer and explanation: D. Install a switch ... virtual LAN and used so that broadcast messages can be sent to all computers and devices that are part of the same VLAN because they are part of the same broadcast domain. D is incorrect because ... Incorrect answers and explanations: A, B, and C. Answer A is incorrect because fault tolerant routes are a main advantage of routers if one route is unavailable. Answer B is incorrect for the same

Ngày tải lên: 04/07/2014, 13:21

... wireless access point. Correct answers and explanations: A and C. Answer A is correct, because enabling MAC address filtering will only allow machines that have had their MAC addresses added to authorized ... (AIEE), 639 Analog modems, 108–109 Analog signaling vs. digital signaling, 240–242 API. See Application program interface APIPA. See Automatic private IP addressing Apple II computer, 11 Application ... Network ArpWatch, 214 Asymmetric digital subscriber line (ADSL), 369 Attachment unit interface (AUI), 72 Attack signature database, 389 Attenuation, 52, 89 Auditing, 433–434 AUI. See Attachment

Ngày tải lên: 04/07/2014, 13:21

... multithreading (SMT). SMT takes advantage of a modern CPU’s super- scalar architecture. Superscalar processors are able to have multiple instructions operating on separate data in parallel. HTT-capable ... SuperXGA (SXGA) has a resolution of 128 0 × 1 024 and an aspect ratio of 5:4, then WSXGA might have a resolution of 1440 × 900 and a 16:10 aspect ratio Each of these advanced resolutions has a standard ... there are four popular implementa- tions of DRAM: SDRAM, DDR, DDR2, and RAMBUS. SDRAM The original form of DRAM had an asynchronous interface, meaning that it derived its clocking from the actual

Ngày tải lên: 10/08/2014, 12:21

... 836 Chapter 17 Installing, Configuring, Upgrading, and Optimizing Security of attack can also be undetectable An attacker can use an invalid IP address,... attack B DDoS attack C Worm attack D ... of back door refers to gaining access to a network and inserting a program or utility that creates an entrance for an attacker. The program may allow a certain user ID to log on without a password ... considered an access attack. A common spoofing attack that was pop- ular for many years on early Unix and other time-sharing systems involved a programmer writing a fake logon program. This program

Ngày tải lên: 14/08/2014, 20:20

... organization must adhere to will help you manage how your network operates. Incorrect answers and explanations: A, B, C. Health Insurance Portability and Accountability Act (HIPAA), Sarbanes-Oxley ... management documentation. Incorrect answers and explanations: B, C, and D. Load balancing, cache engines, technical network diagrams, and building schematics are not part of configuration management ... working at the local county hospital, which of the following regulations should your organization need to be aware of? A. Health Insurance Portability and Accountability Act (HIPAA) B. Sarbanes-Oxley

Ngày tải lên: 04/07/2014, 13:21

... Master 62 Creating Arrays 62 Using the Array Operator 63 Counting the Number of Elements in an Array 65 Assigning Values from an Array to Multiple Variables 65 Multidimensional Arrays 66 Navigating ... 8 Manipulating Data 9 Numeric Values 9 String Values 10 Boolean Values 11 Arrays 11 Objects 11 The NULL Data Type 11 Resources 12 Identifiers, Constants, and Variables 12 Variables 12 Variable ... 35 3 PHP and the Web 49 4 Arrays 61 5 Strings and Regular Expressions 89 6 File Manipulation 105 7 Managing Dates and Times 115 8 Managing Email 127 9 PHP and Databases 145 10 Stream and Network

Ngày tải lên: 26/01/2014, 11:20

... computer language, PHP provides a facility known as a “vari- able” capable of containing data. PHP variables can contain one value at a time (although that value could, for example, be an array, which ... running and by the php.ini settings that belong to your particular installation. Manipulating Data The manipulation of data is at the core of every language—and PHP is no exception. In fact, handling ... true). Arrays Arrays are an aggregate value—that is, they represent a collection of other values. In PHP, arrays can contain an arbitrary number of elements of heterogeneous type (including other arrays).

Ngày tải lên: 26/01/2014, 11:20

... the parameter list. n func_get_args() returns an array containing all the parameters in the parameter list. As an example, let’s write a function that calculates the arithmetic average of all the parameters ... execution. Variable Variables and Variable Functions PHP supports two very useful features known as “variable variables” and “variable func- tions.” The former allows you use the value of a variable as ... that you can’t assign a default value to a parameter passed by reference. Functions and Variable Scope It’s important to note that there is no relationship between the name of a variable declared

Ngày tải lên: 26/01/2014, 11:20

... 22) ); echo $array[‘another array’][2]; ?> An array that contains only other arrays is referred to as a multidimensional array. For example, <? $array = array ( array ( 10, 20, 30 ), array ( ‘a’, ‘b’, ‘c’ ) ); var_dump ... 7/16/04 8:43 AM Page 79 Manipulating Arrays < ?php $array = array ( array (‘Jack’, ‘John’, ‘Marco’, ‘Daniel’), array (21, 23, 29, 44) ); array_multisort ($array[0], $array[1]); var_dump ($array); ?> ... 8:43 AM Page 80 Chapter 4 Arrays < ?php $array = array ( array (‘Jack’, ‘John’, ‘Marco’, ‘Marco’, ‘Daniel’), array (21, 23, 29, 11, 44) ); array_multisort ($array[0], $array[1]); var_dump ($array);

Ngày tải lên: 26/01/2014, 11:20

... RAM and what? A: A swap file 445. Memory that is paged out to the hard drive is known as what? A: virtual memory Congratulations!! You have purchased one of the Troy Technologies USA Study Guides. This ... AUTOEXEC.BAT? A: DOSKEY 40. Which allows faster access; RAM, ROM, or virtual memory? A: RAM 41. What batch file command will stop a batch file operation until a key is pressed? A: PAUSE 42. What ... following is a proper DOS filename? A: !RONNY.EXE 362. A Win 3.x system has a lot of hard drive space, what can you do to optimize it? A: Make a permanent swap file and let Windows manage it. 363. ...

Ngày tải lên: 11/12/2013, 14:15

... - Hard drives store data in circular paths on each platter surface (Head). These paths are called tracks. There are hundreds of circular tracks on each Head. Starting from the inner most track, ... Language) HP’s own hardware dependent printer language. Postscript PDL (Page Description Language) A hardware independent language capable of high resolution graphics. 37 A: Printhead 297: What ... two) A: Assure that you and the PC are at the same electrical charge level Use anti-static spray liberally 2 Memory Random Access Memory (RAM) - The working area of your PC where programs are...

Ngày tải lên: 10/12/2013, 15:15

... either an integer numeric or string value.Thus, for example, an array could contain a floating-point value, a string, a Boolean, and even another array. Although PHP will automatically provide a key ... keys n Creating and handling multidimensional arrays n Sorting arrays n Randomizing arrays n Intersecting arrays n Calculating the difference between one or more arrays n Serializing arrays Creating Arrays The ... In addition, $_REQUEST is a method-agnostic array that you can use to access form data (basically a merge of both $_GET and $_POST). Superglobal arrays are available in every scope, which makes...

Ngày tải lên: 26/01/2014, 11:20

... users. This page intentionally left blank About the Authors xiii daughter, Sara; adorable daughter, Emily; charming son, Jason; and beautiful and talented daughter, Alicia. Dustin L. Fritz (ECSA) is ... specializes in information operations conditions; information assurance vulnerability management; risk and vulnerability assessments; certification and accreditation; security awareness and plan- ning; ... provided support and worked in the areas of pro- gramming, hardware, database administration, graphic design, and network administration. In 2007, he was awarded a police commendation for his work...

Ngày tải lên: 04/07/2014, 13:20