a certification study guide free download

... save what is necessary. D. Always use a transaction when saving the information to a database. E. If the object contains resource variables, it cannot be serialized without first destroying and ... because PHP can generate valid JavaScript Answer D is correct JavaScript, like HTML, can be dynamically generated by PHP Answers A and B are incorrect because the answer is yes Answer C is incorrect ... ever pass them to a function.They are always available. For versions of PHP prior to 4.1.0, you must use a different set of arrays because $_GET, $_POST, and $_REQUEST are not available. Instead,

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

... watermark. 86 Chapter 4 Arrays In PHP, serialization is taken care of by two functions: n serialize() renders the array in a format that can be safely saved to any contain- er (such as a database ... instead: <?php $a = array (‘a’ => 20, 36, 40); $b = array (‘b’ => 20, 30, 40); $array = array_intersect_assoc ($a, $b); var_dump ($array); ?> In this case, the result will be a one-element array ... case, $a[‘a’] and $b[‘a’] are combined together into the $array[‘a’] array. Intersection and Difference If you want to extract all the elements that are common to two or more arrays, you can use

Ngày tải lên: 26/01/2014, 11:20

... systems this range is extended effectively indefinitely) A more human-readable format that PHP can easily convert into its internal format is date arrays A date array is an array consisting ... AM Page 107 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 108 Chapter 6 File Manipulation and constructs an array using them as key value pairs: $arr = array(); if(($fp ... this watermark. [...]... dates in PHP Getting the current date Converting a string into a date Formatting dates and times In this chapter, you will learn how to parse and manipulate dates and

Ngày tải lên: 26/01/2014, 11:20

... Authentication POP (APOP), 436 Authentication server, 197 Automatic private IP addressing (APIPA), 323 B Bandwidth, 50–52, 89 Baseband, 242, 583 Basic rate interface (BRI), 111 WAN, 362 Bastion ... Media, 3 Media access control. See MAC Media attachment unit (MAU), 72 Megabits per second (Mbps), 51 Mesh topology, 27 Messaging application program interface (MAPI), 257 Metropolitan area network, ... Network access security, 468–469 AAA, 431–432 authentication. See Authentication Network address translation (NAT), 291, 345–346, 601 Network analyzer. See Protocol analyzer Network attached

Ngày tải lên: 04/07/2014, 13:20

... ing and maintaining the Niagara Regional Police’s Web site (www.nrps.com) and intranet, he has also provided support and worked in the areas of pro- gramming, hardware, database administration, ... of the DOD’s Advanced Research Projects Agency (ARPA), the goal was to create a network that could withstand a nuclear attack. If any part of ARPANet was destroyed, the other parts of it would ... assurance vulnerability management; risk and vulnerability assessments; certification and accreditation; security awareness and plan- ning; configuration management; and incident response team development.

Ngày tải lên: 04/07/2014, 13:20

... computer named UNIVersal Automatic Computer (UNIVAC). UNIVAC was the first computer to use magnetic tape instead of paper cards to store programming code and data, and much faster than CHAPTER ... “snapshots” of you taken from virtualization software such as VMware as an example. Restoring a system, its data and add- ing more storage, hardware resources, and services becomes very easy ... notable result of Sputnik was the space race between the U.S. and USSR, with the ultimate goal of reaching the moon. The U.S. started the National Aeronautics and Space Administration (NASA),

Ngày tải lên: 04/07/2014, 13:20

... established between corporate offices that are separated by a physical distance extending further than normal LAN media covers. VPNs are available as software (such as Windows VPN, available ... (RAS). They can sim- ply dial into their local ISPs and create a virtual tunnel to the office. A tunnel is created by wrapping (or encapsulating) a data packet inside another data packet and ... 2003 and 2008) and hardware (firewalls such as Cisco PIX or ASA and Nokia/Checkpoint) implementations. In general, software implementa- tions are easier to maintain. However, hardware implementations

Ngày tải lên: 04/07/2014, 13:20

... isn’t a defining factor. WANs are often owned and managed by more than one organization. Each LAN that is part of the WAN may be managed by individuals or IT departments, and either maintains ... to a WAN is to look at how they are connected and how data is sent. This may differ from organization to organization, as there are several different ways of getting data from a LAN to a WAN, ... e-mail program. As you can see by this example, there are many different kinds of LANs and WANs that data may pass through. LANs may be as small as a couple of computers networked together, and

Ngày tải lên: 04/07/2014, 13:20

... network you have. LANs are small networks within a limited area of a few miles, MANs are within a metro- politan area, and WANs interconnect LANs over a wide area. These char- acteristics define ... this information, which of the Offices are part of a LAN and a WAN? A. Office A and B B. Office B and C C. Office C and D D. The entire network (Office A, B, C, and D) An organization has offices ... e-mail, and a SQL server that is used for several databases that have been developed in house. Because of security reasons, floppy disks and other devices to transfer or transmit data to and

Ngày tải lên: 04/07/2014, 13:20

... signals to transmit data. Bandwidth Bandwidth is a measurement of the amount of data that can be passed over a cable in a given amount of time. If you compare cabling to a highway, and data to ... capacity 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 ... will carry the data at varying speeds and distances. Although some cables can carry the data for a hundred meters or so, others can span greater distances, connecting widely spaced areas. In

Ngày tải lên: 04/07/2014, 13:20

... Hardware Loopback Adapter A hardware loopback adapter is a way to test the ports on a system without having to connect to an external device. For example, you can use a serial loopback adapter ... determine what and where the problem is. Cable testers are tools that can analyze the capability of a cable to carry signals and can find breaks or other problems in the wire. In addition to cable ... see later in this chapter when we discuss cabling and cable creation, twisted-pair and coaxial cabling may require replacement of a bad section with a new section of cable. Twisted-pair may

Ngày tải lên: 04/07/2014, 13:20

... connec- tor or a cabling tray and transceiver called a media attachment unit (MAU) are connected to the cable. Another cable called an attachment unit interface (AUI) that can be up to 50 m ... wires are standard with Cat5. 100BaseFX 100BaseFX is another Ethernet standard that uses fiber-optic cabling to transmit data at a speed of 100 Mbps. The distance that this standard can achieve ... keeping cables together, as staples or other methods can damage cable. CABLE MANAGEMENT Cable management and termination of cabling runs becomes important when working as a Network technician. You

Ngày tải lên: 04/07/2014, 13:20

... Terminating a Coaxial Cable Now that you have learned about coaxial cable and how to identify it, we will learn how to terminate a coaxial connector on to a RG type cable. As with twisted-pair cable ... made an official standard. Category 6 is another enhancement to the previous grades and provides support for 10 Gigabit Ethernet. It is officially a part of the 568A standard, making it a standard ... crimper, a pair of 2. coaxial cable strippers, the coaxial cable itself, and BNC connectors. Use the cable cutter to cut a length of coaxial cable from a bulk spool 3. if you have one available.

Ngày tải lên: 04/07/2014, 13:21

... - 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

... 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

... will not automatically download anything that’s referenced in an HTML email. If you want to add images to your email, you need to use attachments. Attaching a File to a Message To attach a file to an ... this watermark. 133 Formatting an Email Message Managing Email Headers Email headers are lines of text that go at the start of an email message. Headers hold information used by MTAs and MUAs. ... attachment”, $mime_message, $more_headers ); ?> You can add as many attachments as you want, but remember—they can make the email quite large to download, and many users are still using dial-up rather than broadband! The last...

Ngày tải lên: 17/10/2013, 21:15

... stream has a transport, perhaps a file wrapper, one or two pipelines, and perhaps a context. PHP also maintains metadata about the stream. What Is Stream Metadata? Stream metadata is data about ... and aggregating data n Using transactions n Escaping user input n Managing dates “Databasics” Most modern general-purpose DBMSs belong to a family known as “relational databas- es.” In a relational ... think of a bank that must update your account informa- tion—stored in a table that contains your actual financial operations and another one in which your account balance is stored—after a deposit....

Ngày tải lên: 20/10/2013, 14:15