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than just files For example, the keyboard sends the letters of keys you press, in ASCII code, to the PC Even the monitor outputs in ASCII when you are running DOS ASCII was the first universal file format Virtually every type of program word processors, spreadsheets, databases, presentation programs can read and write text files However, text files have severe limitations A text file can t store important information such as shapes, colors, margins, or text attributes (bold, underline, font, and so on) Therefore, even though text files are fairly universal, they are also limited to the 256 ASCII characters Even in the most basic text, you need Figure 1010 ASCII characters to perform a number of actions beyond just printing simple characters For example, how does the program reading the text file know when to start a new line This is where the first 32 ASCII characters come into play These first 32 characters are special commands (actually, some of them are both commands and characters) For example, the ASCII value 7 can be either a large dot or a command to play a note (bell) on the PC speaker ASCII value 9 is a Tab ASCII value 27 is an Escape ASCII worked well for years, but as computers became used worldwide, the industry began to run into a problem there s a lot more than 256 characters used all over the world! Nobody could use Arabic, Greek, Hebrew, or even Braille! In 1991, the Unicode Consortium, an international Try This! standards group, introduced Unicode Basic Unicode is a 16-bit Make Some Unicode! code that covers every character A lot of e-mail programs can use Unicode characters, as can Internet for the most common languages message boards such as my Tech Forums You can use Unicode characplus a few thousand symbols ters to accent your writing or simply to spell a person s name corWith Unicode you can make just rectly Martin Acu a when you address him Working with Unicode about any character or symbol is fun, so try this! you might imagine plus a few 1 Open a text editing program, such as Notepad in the thousand more you d never even Windows GUI think of The first 256 Unicode characters are exactly the same as ASCII characters, making for easy backward compatibility 2 Hold down the ALT key on your keyboard, and, referring to Figure 1010, press numbers on your keyboard s number pad to enter special characters For example, pressing ALT-164 should display an , whereas ALT-168 will show a If you have access to the Internet, surf over to the Tech Forums (wwwtotalsemcom) and say howdy! Include some Unicode in your post, of course!.

Notice that the C# account_OverDraft (AccountOverdraft in VB) doesn t return a value and has two parameters that are type object and EventArgs, respectively The account_OverDraft (AccountOverdraft in VB) method is hooked up to the OverDraft event in the Main method in Listing 4-1, repeated as follows for your convenience: C#:

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18% 9% 20% 14% 11% 8% 5% 15%

10 Personal Computer Components 20 Laptop and Portable Devices 30 Operating Systems 40 Printers and Scanners 50 Networks 60 Security 70 Safety and Environmental Issues 80 Communication and Professionalism

accountOverDraft += new EventHandler(account_OverDraft); accountCurrentBalance = -1;

There are hundreds of settings available, though from a security standpoint, some are more relevant than others Table 11-1 includes some key policies that you may wish to review You can find these network policies under User Configuration\Administrative Templates\Network\Network Connections You can increase the security of your network by deploying network policies Network policies for workstations are intended to restrict user actions on the network You can limit users abilities to launch applications that may cause unwanted vulnerabilities Stopping users from using ICS on your domain, for example, can help you maintain a safe network, though it does not prevent users with laptops from taking their computers home and using these features on their own networks To deploy network policies: 1 From the Start menu, type gpmcmsc into the Search field and press ENTER Keep in mind that you must be logged on to a domain for this tool to launch 2 Right-click the top node, Group Policy Management, and choose Add Forest from the options Provide the name of the Active Directory forest, and click OK

Mike Meyers CompTIA A+ Guide: PC Technician (Exams 220-602, 220-603, & 220-604)

3 Expand the forest-level node, and expand the Domains container by doubleclicking it Find and expand the domain of interest by double-clicking it 4 Access the Network Connections node by expanding Computer Configuration\Administrative Templates\Network\Network Connections 5 Double-click the policy that you want to configure On the Settings tab, select either Enabled or Disabled Click OK

AddHandler OverDraft, AddressOf AccountOverdraft CurrentBalance = -1

identifying names, purposes, and characteristics of various devices The IT Technician exam, in contrast, goes into more depth: Add, remove, and configure personal computer components, including selection and installation of appropriate components [Emphasis mine] Laptops and Portable Devices gives another great example Domain 21 is the same for both exams, Identify fundamental principles of using laptops and portable devices Digging a little deeper into the domains shows the differences Essentials: Identify names, purposes, and characteristics of laptop-specific [devices such as] peripherals, expansion slots, [and] communication devices IT Technician: Identify appropriate applications for laptop-specific communication connections such as Bluetooth, infrared, cellular WAN, and Ethernet The former has you identify the technology; the latter requires you to understand it in detail The two exams differ greatly in the Operating Systems domain Essentials tests you on standard installation, configuration, and diagnostic tools, for example, but the IT Technician exam goes much deeper You need to understand intimately how to use the command line to manage the operating systems You re expected to know all sorts of disk structures and run all the major disk management tools Finally, the IT Technician exam grills you on operating system recovery tools and techniques, so you can help customers get back up and running quickly

Help Desk Technician (Exam 220-603)

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