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Internet Applications: Communication and Connection
Search engines are designed to make it easier to find information on the Web.
web crawlers or spiders --software robots that systematically search the web
meta-search – conduct parallel searches using several different search engines and directories
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Search Engines
Some search engines use keywords and Boolean logic to conduct searches
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Search Engines
Other search engines allow searches by using a hierarchical directory or subject tree
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Portals
Web entry stations that offer quick and easy access to a variety of services.
Consumer portals includes search engines, email services, chat rooms, references, news and sports headlines, shopping malls and other services
Corporate portals on intranets serve the employees of particular corporations
Vertical portals are targeted at members of a particular industry or economic sector
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Email on the Internet
What appears on the screen depends on the type of Internet connection you have and the mail program you use.
Popular graphical email programs include Eudora, Outlook and Netscape Communicator.
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Email on the Internet
Email formats include:
ASCII text--can be viewed by any mail client program
HTML--displays text formatting, pictures, and links to Web pages
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Mailing Lists & Network News
Mailing lists allow you to participate in email discussion groups on special-interest topics.
A newsgroup is a public discussion on a particular subject consisting of notes written to a central Internet site and redistributed through a worldwide newsgroup network called Usenet
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Real-Time Communication
Users are logged in at the same time.
Instant Messaging for exchanging instant messages with on-line friends and co-workers
Internet telephony (IP telephony) for long-distance toll-free telephone service
Videoconferencing for two-way meetings
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Rules of Thumb: Netiquette
Say what you mean and say it with care.Keep it short and to the point.Proofread yours messages.Learn the “nonverbal” language of the Net.Keep your cool.Don’t be a source of spam (Internet junk mail).Lurk before you leap.Check your FAQs.Give something back.
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Emoticons
:) Happy person:( Sad person:-) Happy person with a nose:-( Sad person with a nose
Bizarre Emoticons>8-O-(&) Person just realizing that he or she has a tapeworm:---( Person who is sad because he or she has a large nose.-) Person who can still smile despite losing an eyeball~oE]:-| Fisherperson heading for market with a basket on his or her head containing a three-legged octopus that is giving off smell rays
http://www.randomhouse.com/features/davebarry/emoticon.html
;-) Person winking :-D Person laughing :-| Person feeling so-so :-o Shocked person
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Push Technology
The Web was built with pull technology—browsers on client computers “pull” information from server machines. Browser asks for information
With push technology, information is delivered automatically to the client computer. New product descriptions Automatic software upgrades Updated news
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Peer-to-Peer and Grid Computing
Peer-to-Peer (P2P) computing - users share music, movies, and other files without going through a central directory.
Grid computing - anyone can plug in from anywhere and rent processing power and software from anywhere on the Net
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Intranets, Extranets and Electronic Commerce
Intranets are self-contained intra-organizational networks that offer email, newsgroups, file transfer, Web publishing and other Internet-like services.
Firewalls prevent unauthorized communication and secure sensitive internal data
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Intranets, Extranets and Electronic Commerce
Extranets are private TCP/IP networks designed for outside use by customers, clients and business partners of the organization.
electronic data interchange (EDI) - a decade-old set of specifications for ordering, billing, and paying for parts and services over private networks
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Intranets, Extranets and Electronic Commerce
Electronic commerce involves business transactions through electronic networks.
Business-to-business (B2B) e-commerce - transactions that involve businesses providing goods or services to other businesses
Business-to-consumer (B2C) e-commerce - transactions that take place on the Internet, rather than an extranet, because consumers don’t have access to private extranets
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Web Services
Web services involve new kinds of Web-based applications that can be assembled quickly using existing software components
Examples: plug a shopping-cart component into an existing Web
site design applications that can be accessed through a
variety of Web-enabled devices
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The Evolving Internet
Internet2 launched by the government and various corporations in 1998 to provide faster network communications for universities and research institutions.
Next Generation Internet (NGI), will consist of a nationwide web of optical fiber integrated with intelligent management software to maintain high-speed connections.
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Internet Issues: Ethical and Political Dilemmas
Filtering software to combat inappropriate content
Digital cash to make on-line transactions easier and safer
Encryption software to prevent credit card theft
Digital signatures to prevent email forgery
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Internet Everywhere: The Invisible Information Infrastructure
Blurring of the boundaries between the Web and interpersonal communication applications
A variety of Internet appliances, network computers, set-top boxes, PDAs, mobile phones, and other devices connected to the Internet in offices and homes
“In the future, everything with a digital heartbeat will be connected to the Internet.”
Scott McNealy, CEO of Sun Microsystems