Transcript Chapter 1 notes

Computer Components
• Hardware-physical devices of a computer
• Input Devices
– Keyboard
– Mouse
• Peripheral Devices- Attached devices
– Printer
– Scanner
Computer Components
• Output Devices
– Monitor
– Speakers
Computer Concepts
• Base unit- contains the motherboard
• Motherboard-Main circuit board that contains
several components:
– Expansion board- circuit boards that connect to
the motherboard to add functionality to the
computer. Ex. Sound cards and video adapter
– CPU(central processing unit)- processes data and
controls the flow of data between the computer’s
other units.
– Bus- set of circuits that connect the CPU to other
components.
Mobile Computing
• Notebook computer- portable lightweight
computer with a CPU, memory, and hard disk
space that is compared to a typical desktop
computer.
• Tablet PC- computer designed similar to a pad
of paper and a pencil. Users simply “write” on
the screen with a device called a stylus.
Mobile Computing
• Handheld computer- are palm-sized and
contain applications for storing contact
information, schedules, lists, and games.
• Smartphone- cellular phones that are able to
send and receive e-mail messages and access
the internet. Some smartphones have digital
cameras, mp3 players, and color display
capabilities.
• Wearable computer- vary greatly in size and
application.
Networks
Network- combination of hardware and
software that allows computers to exchange
data and share software and devices, such as
printers.
LAN(local area network)- network used to
connect devices within a small area such as a
building or a campus.
WAN(wide area network)- one widespread
network or a number of LANs connected
together.
Networks
• Network operating system- allow users and
devices to communicate over the network.
• Network Architecture- includes the type of
computers on the network and determines
how network resources are handled.
Files and Folders
• File- A collection of related data stored on a
lasting medium, such as a hard drive disk.
• Folders- used to organize commonly related
files.
Intranets, Extranets, and the
Internet
• Intranet- network that is used by a single
organization, such as a corporation or school ,
and is only accessible by authorized users.
• Extranet- extends an intranet by providing
various levels of accessibility to authorized
members of the public.
• Internet- a world-wide network of computers
that is not controlled by any one organization.
Telecommunications
• Telecommunication- the transmitting and
receiving of data.
• Conventional Modem- uses standard
telephone lines to convert analog signals to
digital data.
• DSL- (Digital Subscriber Line) Modem- uses
standard telephone lines with data
transmission up to 640 Kbps.
Cable Modem
• Cable Modem- transmits data through a
coaxial cable television network.
• Leased/Dedicated lines- are used by many
businesses and schools for internet access.
Allows for a permanent connection to the
internet that is always active.
• ISDN(Integrated Services Digital Network)digital telephone network provided by a local
phone company.
Internet Services
• Personal websites- created by individuals for
the purpose of displaying information about
the individual’s hobbies, pets, family
members, and so forth.
• Commercial websites- include corporate
presence websites, which are created by
companies and organizations for the purpose
of displaying information about their products
or services.
Internet Services
• Informational websites- created for the
purpose of displaying actual information
about a particular topic and are often created
by educational institutions, governments, and
organizations.
• Media websites- are online newspapers and
periodicals that are created by companies for
the purpose of informing readers about
current events and issues.
Internet Services
• Portal websites- created by businesses for the
purpose of creating a starting point for people
to enter the Web.