dibblee

 =Digital Literacy=

Electronic Research
toc

Survey On computers:
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Information on Computers
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 Computer Hardware __computer hardware functions:__ Input devices, Memory(ROM, RAM), output devices and secondary are connected to the central processing unit.  Input devices include keyboard, mouse, graphic tables, ports, modems, scanners and digital cameras  Output devices include monitors, ports, modems, printers, plotters, disk drives and machine interfaces.  Ports are divided into two categories parallel and serial  Parallel are printers and SCSI  Serial are modems and mouse, MIDI and USB  Connectors are either male or female  Male have one or more pins <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Female have locators that match the pins on the male <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Storage includes hard drive, floppy drives, CD-ROM, RW-CD-ROM, DVD, RW-DVD and flash memory <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">__Disk capability:__ <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">1 BYTE= 1 CHARATER <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">1 KILOBYTE=1000 BYTE <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">1 MEGABYTE=1000 KB or 1,000,000 KILOBYTES <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">1 GIGABYTE=1000 MB or 1,000,000,000 KILOBYTES <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">__disk fragmentation:__ Fragmented disk shows spaces where data has been removed <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Defragmenting has a place all files in contiguous spaces, increases the efficiency for file retrieval <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Bays: areas inside the computer base designed to facilitate the installation of additional equipment <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Internal bays completely enclosed inside the case for hard drives <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">External bays open end for loading and unloading storage media such as a disklettes tapes and CD-ROMS <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">__memory:__ <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">ROM(read only memory)-programmed by the manufacturer containing system information this information can be overwritten without special software <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">RAM(random access memory)-space available to a computer to use while performing operations. This space is emptied out when the computer turns off. <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Power supple-converts the AC power to a more useable form for the comuter <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">__Operating systems:__ acts like a interface between the application and the computer system <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">__Role of operating system:__ is to perform common computer functions, provide a useful interface, manage system memory, manage processing tasks, provide a networking capability, control access to a system resources and file management. <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">__Network:__ two or more computers connected together <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Uses of LAN-shared storage, shared applications..etc <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">3 types of networks(star, ring and bus) <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">__conclusion:__ <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">hardware devices work together to perform input, output, processing and data storage <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">networks allow computers to share information and resorces <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 10pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">two main categories of software system and application software. <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> <span style="font-size: 12pt; color: black; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">OS is a set of computer to support users computing needs. <span style="font-size: 10pt; color: black; font-family: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">



<span style="font-size: 12px; color: #000000; font-family: Arial, Helvetica, sans-serif;">__Identify the difference between My Computer and Windows Explorer:__ They perform the same basic function, which is to let you explore the hard-drive(s) of the computer  sitting on your desk. They even both allow you to look at hard-drives on remote computers, if correctly mounted (permissions set). The main difference are A) the names; B) finding them; C) the colour <span style="color: blue! important; position: relative;"> scheme
 * File Management**

Otherwise, you can find most of the same options, viewing, file management, etc. eventually, in the menu <span style="color: blue! important; position: relative;"> bars  at the top of each one. Navigation is also "slightly" different.

1) the name difference you already figured out. Once upon a time we had "File manager" on Microsoft systems     which was an even more sensible name for managing files on your local computer, but I guess that got "old".

2) My computer is on the Desktop (computer screen icon), Windows Explorer is in the menu bar from the start button. Confusing, but you get used to it.

3) I suppose the newer colour scheme is smarter. AT least, it's not confusing.


 * Electronic Research**

Encryption is a software tool that uses scrambling to make data unreadable to anyone other than the intended recipient. It is useful to ensure the privacy of data that you store on your computer, or that you want to email to someone else. Encryption software programs use [|algorithms], or complex mathematical processes, to scramble and unscramble (or "encrypt" and "decrypt") the data. Algorithms work through the creation of [|keys], which are specific strings of data used for encryption. These keys consist of long strings of bits, or binary numbers. The more bits in the key, the greater the number of possible combinations of binary numbers, making the code more difficult to break. You may have heard of "56-bit" or "128-bit" keys, for example. With more bits, the 128-bit key is more difficult to break than the 56-bit key. <span style="font-size: 12pt; font-family: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">If you're curious, you can see what an algorithm looks like: [|IDEA] is one of the algorithms used in Pretty Good Privacy (PGP). An encryption algorithm scrambles data by combining the bits in the key with the data bits; in decryption, the algorithm unscrambles data by separating the data bits from the key bits. In [|symmetric key encryption], the same key is used to scramble and unscramble data. In [|asymmetric key encryption], two different keys are required: one to scramble and one to unscramble. With either method, a recipient cannot access the original data without the correct key.