Text consists of characters (letters, numbers, punctuation marks, or any other symbol requiring one byte of computer storage space) that are used to create words, sentences, and paragraphs. Graphics are digital representations of non text information such as drawings, charts, photographs, and animation (a series of still images in rapid sequence that gives the illusion of motion). Audio is music, speech, or any other sound. Video consists of images played back at speeds to provide the appearance of full motion
2. The characteristics of LCD monitors, LCD screens, plasma monitors, and HDTVs.
- LCD Monitor- ultra-slim, stylish,full color display devices for the PC that fit in any part of the home or office.
- LCD Screens- lightweight, aesthetically appealing, energy efficient and long-term cost effective.
- Plasma Monitors- produce rich colors along with very deep blacks,wide viewing angles allow more people to be able to watch TV comfortably, pixels of Plasma TV’s are lit individually so the pixels can be completely turned off to display truck black colors.
- HDTVs- black level, brightness, contrast, color saturation, image processing, screen composition, tuners and cable card.
3. What are the components inside the systems units.
Processor
Memory
Adapter Cards
.Sound Card
.Modem card
.Video Card
.Network Card
Ports
Drive Bays
Power Supply
4. The components of a processor and how they complete a machine cycle.
Components of a Processor
- Control unit -- responsible for supervising the operation of the entire computer system.
- Arithmetic/logic unit (ALU) -- provides the computer with logical and computational capabilities.
- Register -- a storage location inside the processor.
What is a machine cycle?
· Four operations of the CPU comprise a machine cycle
· Also called instruction cycle
- Instruction time (i-time) - time taken to fetch and decode
- Execution time (e-time) - time taken to execute and store
An example of a machine cycle
· Student enters math problem (100 x 52) into computer’s memory
· Result in memory displays on monitor’s screen
5. Define a bit and describe how a series of bits represents data.
Eight bits group together as a unit.
Provides different combination of 0s and 1s to represent 256 individual characters.
- Numbers
- Upper Case and Lower case letters
- Punctuation Marks
Step 2 An electronic signal o for the letter is sent to the system unit.
Step 3 The signal for the letter is converted to its coding system and its stored in memory for processing.
Step 4 After processing, the code for the letter is converted to an image, and displayed on an output device.
6. Identify the categories of application software.
Categories of Application Software:
- Personal productivity Applications
- Multimedia and Graphics applications
- Communications applications
- Home and Educational
7. Identify the key features of widely used business programs.
The Key Features in Business programs in terms of software is editing and typing and other stuff knowing what letters to use like formating.
8. What are the advantages of using application software on the Web.
Using web authoring software can help build web pages faster, an advantage if you are facing a deadline or a large project. There are several different types of web authoring software you can use to make great web pages without having to know all of the ins and outs of web page creation.
9. History of the Internet.
The history of the Internet starts in the 1950s and 1960s with the development of computers. This began with point-to-point communication between mainframe computers and terminals, expanded to point-to-point connections between computers and then early research into packet switching. Packet switched networks such as ARPANET, Mark I at NPL in the UK, CYCLADES, Merit Network, Tymnet, and Telenet, were developed in the late 1960s and early 1970s using a variety of protocols. The ARPANET in particular led to the development of protocols for internetworking, where multiple separate networks could be joined together into a network of networks.
In 1982 the Internet Protocol Suite (TCP/IP) was standardized and the concept of a world-wide network of fully interconnected TCP/IP networks called the Internet was introduced. Access to the ARPANET was expanded in 1981 when the National Science Foundation (NSF) developed the Computer Science NetworkNSFNET provided access to supercomputer sites in the United States from research and education organizations. The ARPANET was decommissioned in 1990. Commercial internet service providers (ISPs) began to emerge in the late 1980s and 1990s and the Internet was commercialized in 1995 when NSFNET was decommissioned, removing the last restrictions on the use of the Internet to carry commercial traffic. (CSNET) and again in 1986 when
Since the mid-1990s the Internet has had a drastic impact on culture and commerce, including the rise of near instant communication by electronic mail, instant messaging, Voice over Internet Protocol (VoIP) "phone calls", two-way interactive video calls, and the World Wide Web with its discussion forums, blogs, social networking, and online shopping sites. The research and education community continues to use advanced networks such as NSF's very high speed Backbone Network Service (vBNS) and Internet2. Increasing amounts of data are transmitted at higher and higher speeds over fiber optic networks operating at 1-Gbit/s, 10-Gbit/s, or more. The Internet continues to grow, driven by ever greater amounts of online information and knowledge, commerce, entertainment and social networking.
10. What are diferent storage devices.
Hard Drive (Internal)
Internal Hard Drive
You computer's hard drive is the first most important type of storage. Anything that you download, applications that you install, your pictures, videos and music are all stored directly to your hard drive. Basically, anything that is on your computer is stored to your internal hard drive. Internal hard drive capacity is measured in gigabytes. For example, you may have a 500GB SATA hard drive on your computer. Also, internal computer hard drives have different speeds such as 5400RPM and 7200RPM. This reading is the speed that the hard drive disk spins. A faster hard drive will have higher RPM. The faster the hard drive spins, the faster your hard drive can read data, as well as write data.
2. External Hard Drives
External Hard Drive
External hard drives are exactly the same as internal drives, with one exception. Rather then being enclosed inside your computer, external hard drives have their own separate casing and sit externally to your computer. External hard drives can connect to your computer in a variety of ways. Some common connection types are: USB 2.0, ESATA, Firewire 400 and Firewire 800. External hard drives measure capacity in gigabytes and have different speeds as well. For the most part, external hard drives are used for backup and storing files that a computer user may want to transport.
3. Network Attached Storage
NAS Server
Another common form of computer storage is network attached storage or NAS. Network attached storage is a method commonly used by businesses to share files between computers. A NAS is simply a storage device connected to a computer network. This is beneficial because many computers can read and write to a NAS. Network attached storage capacity is measured in gigabytes. Also, NASs are available with different hard drive speeds.
Many at home computer users often create their own NAS devices by connecting an external hard drive to their router. This allows them to access it wirelessly, as well as share it with other computers.
4. Optical Media Storage
Optical Drive
Optical media storage is basically writing data to a CD or DVD. When your burn a CD, you are storing songs and music on the CD so that you can listen to it later. If you are burning a DVD, you are storing a video on it so that you can watch it later. CD-RW and DVD-RW media has the capability to be recorded on and erased later if necessary. This makes optical media storage ideal for transporting relatively small amounts of data.
5. Flash Drives
Flash Drive
Flash drives, or thumb drives, are one of the newest forms of computer storage. These drives connect to any computer by way of USB. Often times, students as well as business professionals, use flash drives as a simple way to transport text documents to and from work, and to and from school. When flash drives were first released, storage capacity was rather limited. However, companies are now manufacturing flash drives with huge storage capacities, up to 64GB.
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