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Different types of peripheral devices for computers

Define and describe different types of peripheral devices from all the components with examples. The examples should not include only one type of components only.

1.1 Desktop personal computers

1.1.1 Printer

In the computer, printers is a computer peripheral device that produces a hard copy (permanent human-readable text and/or graphics on paper) from data stored in a computer connected to it printers is used to print anything that user want, like pictures, documents or data. A lot of printers are primarily used as local peripherals, and are attached by a printer cable, in largely new printers, a USB cable to computer which serves as a file source. A quantity of printers, normally known as network printers, can serve as a hardcopy device for any user on the network and have built-in network interfaces (characteristically Ethernet and/or wireless). Person printers are often designed to support both network and local connected users at same time.

Besides, the minority modern printers can directly interface to electronic media such as flash drive or flash memory cards, or to image capture devices such as digital cameras, scanners; a quantity of printers are combined with a scanners and/or fax machines in a single unit, and can function as photocopiers. Printers that include non-printing features are sometimes called All-In-One (AIO) printers, Multi-Function Devices (MFD), or Multifunction printers (MFP). Most MFPs include printing, scanning, and copying in the middle of their features.

1.1.1.1 The 4 printer qualities of mainly interest to most users are:

1.

Resolution

Resolutions are generally measured in DPI (dots per inch). Most economical printers provide enough resolution for most purposes at 300 - 600 dpi.

2.

Color

Most color printer use 2 ink cartridges (1 black ink and 1 color ink) that after a certain number of pages, then need to replace. The color printer is more expensive to operate.

3.

Memory

Printer memory (RAM) is built in to the printer and come with a small amount of memory (e.g. 1024kilobyte) that the user can be expanded.

4.

Speed

Economical printers print speed only about maximum 6 sheets per second. Color printer printing is slower; more expensive printer is much faster.

Table 1.1: printer qualities

1.1.1.2Advantages and disadvantages

Advantages

Disadvantages

· Users can see everything on hard copy whatever users see incomputer monitor.

· The running costs are low and the purchase cost is low.

· Printing is slower; therefore inkjets are not designed for high volume printing.

· If the printer runs out of ink users will have to pay to refill or buy it.

Table 1.2: printer advantage and disadvantage

1.1.2 Monitor

In computers, monitor is a device similar to a television screen (below 24 inch) that receives video signals from the computer and displays the information for users. The types of monitor have: Cathode-Ray Tube (CRT) and Liquid Crystal Display (LCD).

The CRT monitor is the oldest form of display for computer systems.The feature of CRT monitor that pixels are illuminated by an electron beam that passes back and forth across the screen very quickly.

The LCD monitor that uses LCDtechnologies quite than the oldCRT technologies used by nearly all desktop computer monitors. The feature of LCD that liquid crystal is sandwiched between two transparent layers to form image. When electric current passes through the liquid crystal solution, the crystals move around, either letting the light shine through or blocking the fluorescent light.

1.1.2.1 The 3 monitor qualities

Screen size

The diagonal measurement of the screen surface in inches (18.5, 19, 20, 21, 23, 24)

Resolution

The sharpness of the image or graphic determined by the number of horizontal and pixels (vertical dots) that the screen can display (800 x 600, 1024 x 768, 1600 x 1200).

Refresh rate

The speed at which the screen is redrawn (refreshed) and measured in Hertz (60, 75Hz)

Table 1.3: printer qualities

1.2 Mobile computes

1.2.1 Memory card

In computers, the memory card that sometime called flash memory card and storage card. The memory card is a small storage capacity medium to uses to store data such as text, image, music and video, for uses on small, portable or remote computing devices and the memory card can be erased and rewritten with new data.

Besides, although other technologies are being developed, most of the current product uses flash memory. There are type of memory card on the market, including the Secure DigitalCard (SD Card), Multi Media Card (MMC), Smart Media Card, Compact FlashCard (CF Card) and Memory stick. Any types of memory card have a differing size and the memory card storage capacity has from 128 MB up to 32GB.

1.2.2 Flash drive

In computers, the flash drive (sometime called jump or pen drive) is a small and portable UniversalSerialBus (USB) drive that can be used to rapidly transfer audio, video, image and data files from thehard driveof onecomputerto another. The flash drive storage capacity has from 128 MB up to 64 GB.The flash drive is very easy to use, most recent flash drive is plug_and_play, is not need using anything CD or download any software to install the driver.

1.3 Mobile phone

1.3.1 Headset

In computers, the headset is a pair of headphones with a microphone attached. While headphones can only be used as a listening device, the headset can be used as a listening and a recording device through recording through its microphone.

As far as listening is concerned, headsets can have all the same functionalities and features as mobile phone, since they are mobile phone, only with the adding of microphone.

As far as recording is concerned, headsets usually have a microphone boom attached to one of the speaker ear cups. This boom is designed to be extended to the front of a user is mouth for the user to speak into it, generally at about an inch's distance. This is usually how recording is done with standard headsets. Nevertheless, most new technology is arising in which headsets no longer need microphone booms to record sound. These headsets are called boom less headsets. Nonetheless, the vast majority of headsets use microphone booms.

Question 2

Storage is where you save or keep data, instructions, and information for future use. Home users use storage to save data documents, music, etc. Office or business users use storage to keep, their transaction and other office related records. Discuss the various types of storing devices which are available.

2.1 Home users

2.1.1 Flash drive

This small device has enough storage capacity to easily manage and transfer large digital files. The flash drive several kinds of storage capacity have 256 MB up to 64GB. Therefore home users need the storage capacity of how much is enough? A 4 GB flash drive is usually enough for sharing some audio files, video and picture. These drive with the storage capacity of 1 or 2 GB will help you store a fair number of audio and video files whereas a 4 GB will let you store too many files. Most of these drives are compatible with all the versions of Windows, the 8.6 and above version of Mac OS and 2.4 and above of Max Kernel without the need of a driver but a few of these need drivers.

2.1.2 Memory card

There are type of memory card on the market, including the Secure DigitalCard (SD Card), Multi Media Card (MMC), Smart Media Card, Compact FlashCard (CF Card) and Memory stick. Any types of memory card have a differing size and the memory card storage capacity has from 128 MB up to 32GB.

Therefore, home users need the storage capacity of how is enough? A 4 GB memory card is usually enough for storing and sharing some video files, music and picture. As most memory card is use by phone and camera, phone and camera files is not very large, so 4GB storage capacity is enough for home user. When you purchase it, consider the space you will require for sharing files. Use Internet to search different pen drives and compare the prices at various online stores. You should check out the reviews of different drives on various websites which will give you a fair idea of what's good and what's not.

2.1.3 CD-R

The CD-R full name is Compact Disc-Recordable. The CD-R is optical storage that store data as tiny pits burned into a disk by laser. The CD-R disks that can be read and written to, but the CD-R disks can only be written for “once” and drives that are capable of reading and writing data are needed. In side CD-R disks storage capacity is very small, normally each disks only have 700MB storage capacity. Most of use by storing music, picture or movie.

2.1.4 CD-RW

The CD-RW full name is Compact Disc-ReWritable. The CD-RW same like CD-R also is optical storage. The different between CD-RW and CD-R is CD-RW is erasable, CD-RW can be written too many times and drives that are capable of reading, writing and erasing data are needed. The CD-RW storage capacity is same with CD-R, most of 700 MB capacity only.

2.1.5 DVD+R/DVD-R

DVD+R or DVD-R full name is Digital Video Disk Recordable. They are same, but incompatible with. The disk that is a format for optical data storage. They use technology similar to CD-R. They are capable of storing up to 17 GB of data. Normally 4.7GB storage capacity is enough for home users to storing and sharing some movie video files. Besides, their data transfer rate is comparable to that of hard disk drives and they are compatible with CD-ROM disks.

2.2 Office or business users

2.2.1 External hard disk drive

Hard disk drives that storage capacity is up to 1.5 terabytes (TB), is a very big storage capacity storage devices. The Office or business users need to use large storage capacity to keep, their transaction and other office related records. So that External hard disk can provide enough storage capacity for office or business users.

Besides, the hard disk drive access time is the fastest among all permanent storage devices. Furthermore the hard disk drive data transfer rate (MB per second) is much faster than other storage devices and spindle speed is measured in revolutions per minute (rpm).

2.2.2 Flash drive

This small device has enough storage capacity to easily manage and transfer large digital files. The flash drives that storage capacity is up to 64GB. Therefore, a 64 GB flash drives is usually enough for office or business users use storage to keep, their transaction and other office related records.

Besides, Most of flash drives are compatible with all the versions of Windows. Some of flash drives come with the option of password protection so users can have an additional advantage of protecting some of the files that users think need security. Flash drives are more likely to get viruses when these are exposed to the computers that might not be protected. Flash drives are dozens of anti virus software that detect viruses. Users must scan their flash drive every time users are using it.

2.2.3 DVD-R/DVD+R

DVD+R or DVD-R full name is Digital Video Disk Recordable. They are same, but incompatible with and the older DVD-R standard. The disk that is a format for optical data storage. The DVD-/+R formal similar CD-R and they are compatible with CD-ROM disks. Besides, their data transfer rate is comparable to that of hard disk drives and they are capable of storing up to 17 GB of data. Therefore, they can support to office or business users use storage to keep, their transaction and other office related records.

2.2.4 DVD+RW

The DVD+RW disks short for DVD+ReWritable. The DVD+RW formal similar CD+RW and same are an optical storage. Most of feature same with DVD-/+R, the different is DVD+RW disks allow users to read, write and erase DVDs many time.

2.2.5 Zip disk drive

The Zip drive is a magnetic disk. Magnetic disk is a machine thatreadsdatafrom andwritesdata onto adisk. A disk drive rotates the disk very fast and has one or more heads that read and write data. The Zip drive is an earlier 3.5" removable disk drive from Iomega. Zip disks came in 100MB, 250MB and 750MB varieties, with the latter introduced in 2002 using USB and FireWire interfaces. The 250MB drives introduced in 1998, also can read and wrote 100MB disks. The 750MB drives read all, but cannot wrote 100MB disks. The 7050MB drives is only can wrote 250MB and 750MB disks Although the Zip drive storage capacity is very small, the Zip drive is cheaper than other type of storage devices. Nowadays, most of Bank Company still uses the Zip drive to storing, sharing and transfer pure text or document files.

Conclusion

As conclusion, Computer is important in the modern world reason been is that it helps to simplifies life. If it was not for computer there would still be a lot of hidden information, people would not get to communicate so easy, fast and efficiently, however it is not like that because of computer we now get privilege of all these things.

When I finished my assignment, I would like sad I learned a lot from this assignment about types of peripheral devices from the entire component and the various types of storing devices which are available. Besides, I really thank you to Olympia College Johor Bahru, because they give me a chance to study at their college. I also want to thanks my Introduction to Information Technology lecturer: Ms Zali, because she is teaching and guiding me to do the assignment, when I confuse to how to do this assignment. Thanks a lot for her. I am learning more of thing about computer and Information Technology. I will hard working and get a good results.

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