Transcript Review for ch2

Review of Chapter 2
• Important concepts
– The Internet is a worldwide collection of networks
that links millions of businesses, government
agencies, educational institutions, and individuals
– Many home and small business users connect to the
Internet via high-speed broadband Internet service
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Cable Internet service: through cable television network
DSL: using regular copper telephone line
Dial-up: using standard telephone lines
Fiber to the Premises (FTTP): through fiber-optic cable
Fixed wireless: using dish-shaped antenna to send signals
Cellular Radio Network: using cell phone wireless modems
Wi-Fi: using radio signals
Satellite Internet Service: via satellite
• Important concepts
– An access provider is a business that provides individuals
and organizations access to the Internet free or for a fee
• ISP: Provide access to the internet
• OSP: Provide access to the internet AND some member-only
features
• Wireless internet service provider: Provide wireless access to the
internet
– A web browser allows users to access Web pages
and Web 2.0 programs.
• Components of a web page
– Link(Hyperlink): build-in connection to other web page or
part of the web page
– URL(Uniform Resource locator): Consists of a protocol,
domain name, path to the web page or web application
• Important concepts
– Practice
• Figure out the protocol, domain name and path to the
web page in following url:
– http://www.foobar.com/foobar/foobar.html
– Use search engine
• Search engine: Finds information related to a specific
topic
• Subject directory: Classifies Web pages in an organized
set of categories
• Important concepts
– Types of web sites
• Blog: informal web site consist of time-stamped articles
, or posts ,in a diary or journey format.
• Wiki: Collaborative web site that allows users to create ,
modify or delete the web site content via their
browser
• Online social network: Encourage users to share their
ideas or life experiences to other users.
• Web application: web site allows users to access and
interact with software through web browser or any
computers or devices that connected to a network
• Important concepts
– Multimedia
• A graphic is a digital representation of nontext information
– BMP, GIF, JPEG, PNG, and TIFF
• Animation is the appearance of motion created by displaying
a series of still images in sequence
• Audio includes music, speech, or any other sound
Compressed to reduce file size
• Streaming is the process of transferring data in a continuous
and even flow
• Video consists of images displayed in motion
• Virtual reality (VR) is the use of computers to simulate a real
or imagined environment that appears as a threedimensional space
• A plug-in is a program that extends the capability of a Web
browser
• Important concepts
– E-commerce is a business transaction that occurs
over an electronic network
• Business-to-consumer (B2C)
– Example: Apple application market, Steam, Amazon
• Business-to-business (B2B)
– Online transactions between visa and amazon.com
• Consumer-to-consumer (C2C)
– ebay
• Important concepts
– A mailing list is a group of e-mail names and addresses given a single
name
• Subscribing adds your e-mail name and address
• Unsubscribing removes your name
– Instant messaging (IM) is a real-time Internet communications service
– A chat is a real-time typed conversation that takes place on a
computer
– A chat room is a location on an Internet server that permits users to
chat with each other
– VoIP (Voice over IP) enables users to speak to other users over the
Internet
– A newsgroup is an online area in which users have written discussions
about a particular subject
– A message board is a Web-based type of discussion group
– FTP (File Transfer Protocol) is an Internet standard that permits file
uploading and downloading with other computers on the Internet
• An FTP server is a computer that allows users to upload and/or
download files using FTP
• IP address
– An IP address is a number that uniquely identifies each
computer or device connected to the Internet
• The format of IPv4 address (Class A, Class B, Class C)
– A domain name is the text version of an IP address
• Top-level domain (TLD)
– A DNS server translates the domain name into its
associated IP address