(Week 3) Chapter3 Computer Hardware IPO Storage and Network Flashcards
It refers to the physical equipment or components of an electronic data processing. It is also composed of input, output and storage and network devices.
Computer Hardware
are the hardware devices which take information from user of the computer system, convert it into electrical signals and transmit it to the processor.
Input Devices
A device that used to
point to and select items
on your computer screen.
Mouse
A computer
hardware that used to input text characters and other commands.
Keyboard
A Device that used to transfer images or text a computer there are special models the negatives or to scan book.
Image scanner
It is low resolution video
camera used to provide visual
input.
Web Camera
is an input device to input
sound that is then stored in a digital form.
This is used to add sounds.
Microphone
It is used to present information to the user from a computer. It takes data from the computer system and convert it to a form that can be read by humans.
Output Devices
The most common
monitor type, red, green,
blue electron beams. Most
tv’s used this technology
Cathode-ray (CRT)
Is commonly used in laptops
and some projectors. It consist
of two polarizing filters with a
liquid crystal solution.
Liquid crystal display (LCD)
Is a technology used in projectors, these projectors
use a spinning color wheel with a microprocessor
controlled array of mirrors called a digital
micromirror device (DMD)
Digital light processing (DLP)
are output devices that create hard copies of computer files. Some printers specialize in particular applications.
Printers And Fax Machines
are output devices for audio.
Speakers and Headphones
Alternatively referred to asdigital storage,storage,storage media, orstorage medium, astorage deviceis anyhardwarecapable of holding information either temporarily or permanently.
Storage Device
is one
of the most common types
of storage used with
computers.
Magnetic storage device
Another common storage
device is this lasers and
lights as its method of
writing and reading data.
Optical storage device
Has started to replace
magnetic media, it is
more efficient and
reliable.
Flash memory
Early computers had no method of using any of the above technologies for storing information, these form is rarely used.
Paper storage
It operates at the physical layer. Its job is to regenerate the signal over the same network.
Repeater
It is basically a multiport repeater. A hub connects multiple wires coming from different branches.
HUB
These are the hubs which have their own power supply and can clean, boost and relay the signal along the network.
Active HUB
These are the hub which collect wiring from nodes and power supply from active hub. These hub relay signals onto network without cleaning and boosting.
Passive Hub
It operates a data link layer. It is a repeater, with add on functionality of filtering content by reading the MAC addresses of source and destination. It is used for interconnecting two LANS working on the same protocol.
BRIDGE
These are the bridge in which the stations are completely unaware of the bridges existence i.e.
Transoparent Bridge
is used ontoken ring networks, and is standardized in Section 9 of theIEEE802.2 standard. The operation of the bridge is simpler (spanning tree protocol is not necessary) and much of the bridging functions are performed by the end systems, particularly the sources, giving rise to its name.
Source Routing Bridge
It is a multi port bridge with a
buffer and a design that can
boost can perform error, it
divides collision domain of host.
Switch
In order for devices on the network to connect to theInternet, thismust be connected to a modem. Therefore, mostof thesehave a specific Ethernet port that is designed to connect to the Ethernet port
Routers
It is a passage to connect
two networks together that
may work upon different
networking models.
Gateway
Also known as a bridging router which combines features of both bridge and router. It is working as a bridge, it can filter local area network traffic.
Brouter
