Wi-Fi Terms and Definitions (part 2)

Wi-Fi is the technology used for wireless networking. If your computer has a wireless card, it is most likely Wi-Fi compatible. The wireless card transmits to a wireless router, which is also based on the Wi-Fi standard. Wireless routers are often connected to a network, cable modem, or DSL modem, which provides Internet access to anyone connected to the wireless network.

Bluetooth is the technology often used for wireless keyboards and mice, wireless printing, and wireless cell phone headsets. In order to use a device such as a Bluetooth keyboard or mouse, your computer must be Bluetooth-enabled or have a Bluetooth adapter installed. 

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Wi-Fi (short for Wireless Fidelity) is the brand name licensed by

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Hardware terms explain

Access Point

An access point is a device, such as a wireless router, that allows wireless devices to connect to a network. Most access points have built-in routers, while others must be connected to a router in order to provide network access. In either case, access points are typically hardwired to other devices, such as network switches or broadband modems.

Access points can be found in many places, including houses, businesses,

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Internet terms explain

404 Error

A 404 error is a common website error message that indicates a webpage cannot be found. It may be produced when a user clicks an outdated (or "broken") link or when a URL is typed incorrectly in a Web browser's address field. Some websites display custom 404 error pages, which may look similar to other pages on the site. Other websites simply display the Web server's default error message text, which typically begins with "Not Found." Regardless of the appearance, a 404 error means the server is up and running, but the webpage or path to the webpage is not valid.

So why call it a "404 error" instead of simply a "Missing Webpage Error?" The reason is that 404 is an error code produced by the Web server when it cannot find a webpage. This error code is recognized by

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Computer Learning (part 1)

File formats definitions
Batch file
A batch file is a type of script that contains a list of commands. These commands are executed in sequence and can be used to automate processes. For example, some programs may include a batch file that executes a number of commands as the program starts up. A user can also create a custom batch file to automate tedious processes such as copying multiple directories or renaming several files at once.

Batch files are run by the COMMAND.COM program, which is part of DOS and Windows. Therefore, batch files can only be run within the Windows operating system. Macintosh and Unix have other scripting tools, such as AppleScript and Unixshell commands, that can be used for similar tasks. Because batch files contain executable commands, it is important not to open unknown batch files on your hard disk or in e-mail attachments.

File Extensions: .BAT, .CMD




Bitmap
Most images you see on your computer are

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Computer Learning (part 3)

Computer Acronyms definitions
AGP (Accelerated Graphics Port)
Stands for "Accelerated Graphics Port." AGP is a type of expansion slot designed specifically for graphics cards. It was developed in 1996 as an alternative to the PCI standard. Since the AGP interface provides a dedicated bus for graphics data, AGP cards are able to render graphics faster than comparable PCI graphics cards.

Like PCI slots, AGP slots are built into a computer'smotherboard. They have a similar form factor to PCI slots, but can only be used for graphics cards. Additionally, several AGP specifications exist, including AGP 1.0, 2.0, and 3.0, which each use a different voltage. Therefore, AGP cards must be compatible with the specification of the AGP slot they are installed in.

Since AGP cards require an expansion slot, they can only be used in desktop computers. While AGP was popular for about a decade, the technology has been superseded by PCI Express, which was introduced in 2004. For a few years, many desktop computers included both AGP and PCI Express slots, but eventually AGP slots were removed completely. Therefore, most desktop computers manufactured after 2006 do not include an AGP slot.


BASIC (Beginner's All-purpose Symbolic Instruction Code)
Stands for "Beginner's All-purpose Symbolic Instruction Code." BASIC is a computer programming language that was developed in the mid-1960s to provide a way for students to write simple computer programs. Since then, the language has evolved into a more robust and powerful language and can be used to create advanced programs for today's computer systems.

BASIC originally used numbers at the beginning of each instruction (or line) to tell the computer what order to process the instructions. Lines would be numbered as 10, 20, 30, etc., which would allow additional instructions to be placed between commands later on if needed. "GOTO" statements enabled programs to loop back to earlier instructions during execution. For example, line 230 of a BASIC program may have an "if" clause that tells the computer to jump back to line 50 if a variable is less than 10. This instruction might look something like this:

230 IF (N < 10) THEN GOTO 50

More modern BASIC implementations use "while loops," which perform a series of instructions as long as a certain case is true. Newer BASIC development software also supports more data types, such as integers, strings, and arrays, for storing variables and other data. While the first BASIC development environments were strictly text-based, today's BASIC programming software allows developers to design much of their programs visually, using a graphical user interface. Some of the more popular BASIC development programs used today include REALbasic and Microsoft Visual Basic.


DDR2 (Double Data Rate 2)
Stands for "Double Data Rate 2." DDR2 RAM is an improved version of

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Computer Learning (part 2)

Bits and Bytes definitions
Bandwidth
Bandwidth refers to how much data you can send through a network or modem connection. It is usually measured in bits per second, or "bps." You can think of bandwidth as a highway with cars travelling on it. The highway is the network connection and the cars are the data. The wider the highway, the more cars can travel on it at one time. Therefore more cars can get to their destinations faster. The same principle applies to computer data -- the more bandwidth, the more information that can be transferred within a given amount of time.


Bit
The computer term "bit" comes from the phrase "Binary DigIT," which is

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Technical terms explain

802.11b

802.11b is a Wi-Fi standard developed by the IEEE for transmitting data over a wireless network. It operates on a 2.4 GHz band and allows for wireless data transfers up to 11 Mbps. A faster standard, called 802.11g, was introduced a few years after 802.11b and supports data transfer rates up to 54 Mbps. This can make a difference in the speed of data transfers within a local network, but since broadband Internet access is limited to around 5 Mbps, a 802.11b wireless connection will not be a bottleneck for Internet access. Most wireless networks are based on either 802.11b or 802.11g.

Ad Hoc Network

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Software Learning

Software terms explain  Antivirus Antivirus software is a type of utility used for scanning and removing viruses from your computer. While many types of antivirus (or "anti-virus") programs exist, their primary purpose is to protect computers from viruses and remove any viruses that are found. Most antivirus programs include both automatic and manual scanning capabilities. The automatic scan may check files that are downloaded from the Internet, discs that are inserted into the computer, and files that are created by softwareinstallers. The automatic scan may also scan the entire hard drive on a regular basis. The manual scan option allows you to scan individual files or your entire system whenever you feel it is necessary. Since new viruses are constantly being created by computerhackers, antivirus programs must keep an updated database of

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Definitions to wireless technology (part 1)

Wireless is a term used to describe telecommunications in which electromagnetic waves (rather than some form of wire) carry the signal over part or all of the communication path. Some monitoring devices, such as intrusion alarms, employ acoustic waves at frequencies above the range of human hearing; these are also sometimes classified as wireless.

The first wireless transmitters went on the air in the early 20th century using radiotelegraphy (Morse code). Later, as modulation made it possible to transmit voices and music via wireless, the medium came to be called "radio." With the advent of television, fax, data communication, and the effective use of a larger portion of the spectrum, the term "wireless" has been resurrected.

Common examples of wireless equipment in use today include:

• Cellular phones and pagers
  

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Streaming server updated (part 4)

Logging and Viewing Error Messages:
A log of error messages can help you troubleshoot problems with streaming services. To log errors, open Quick Time Streaming Server Administration and be sure the Log Errors box in the Settings panel has a checkmark in it. (It is checked by default.) To view the error log file, choose Show Error Log from the Server menu.

If you click the Clear button in the Error Log window, information in the error log is copied to another file, named by date. If you don't clear the log, then error information older than one week is cleared automatically. If you want to delete the cleared access information, drag the dated file to the Trash.

Troubleshooting:
You will be able to troubleshoot streaming problems more easily if error logging is turned on. See the previous section, "Logging and Viewing Error Messages."

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