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BFOR 100 Final Exam With Complete Solutions 100% Verified
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BFOR 100 Final Exam With Complete Solutions 100% VerifiedSerial Port
also known as communication (COM) port, it is utilized for the connection of external
devices such as a modem, mouse, or keyboard, 9 pin and 25 pin models, data travels at
115 kilobits per second
Parallel Port
generally used for connecting scanners and printers, can transmit many bits at once
because it utilizes parallel communication, data transfer speed is considerably higher
compared to the serial port, also known as printer port, IEEE 1284-compliant Centronics
port
VGA Port
video graphic array connector connects the monitor to a computer's video card, has 15
holes, similar to the serial port connector except this port has holes in it while the serial
connector has pins
DVI Port
used to connect LCD (flat panel) monitor to computer's high-end video graphic cards
and is very popular among video card manufacturers
HDMI (High-Definition Multimedia Interface)
It is a standard for simultaneously transmitting digital video and audio from a source,
such as a computer or TV cable box, to a computer monitor, TV or projector
PS/2 Port
special ports used for connecting old computer keyboard and mouse, invented by IBM,
aka mouse port, computers come with 2 for mouse and keyboard, IEEE 1284-compliant
Centronics port
,USB (Universal Serial Bus)
Connects all kinds of external USB devices, such as external hard disk, printer, scanner,
mouse, keyboard, etc. There are at least two of these ports provided in most of the
computer systems. It is a kind of new type serial connection Port, which is much faster
than the old serial Ports. Introduced in 1977, data travels at 12 megabits per second.
USB compliant devices can get power from a USB port.
Sockets
microphones and speakers are connected with the help of these ports to the sound card
of the computer
Ethernet Port
helps to connect to a network and high-speed Internet (provided by LAN or other
sources), it connects the network cable to a computer and resides in an Ethernet card,
data travels at 10 megabits to 1000 megabits per second depending upon the network
bandwidth
Power Port
used to turn the computer on and off, three-prong plug, connects to the computer's
power cord that plugs into a surge protector or directly into a wall socket
Game Port
connects game controller to a PC, no longer in use, replaced by USB
Modem Port
connects a modem in a PC to the telephone system
Firewire Port
transfers large amounts of data at a very fast speed, connects camcorders and video
, equipment to computer, data travels at 400 to 800 megabits per second, invented by
Apple, 3 variants: 4-Pin ____ 400 connector, 6-Pin ____ 400 connector, and 9-Pin ____ 800
connector
External Devices
connected to a computer using cables and ports
Ports
slots on the motherboard into which a cable of external device is plugged in
mouse, keyboard, monitor, microphone, speakers, etc.
What are external devices attached via ports?
-data redundancy
-lack of data integration/flexibility
-data dependency
-poor security
What are problems with traditional file processing?
bit, byte, field, record, file, database
What is the data hierarchy from smallest to largest?
Bit
binary digit (0 or 1) that represents circuit on or off
Byte
typically 8 bits
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