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Speaking Geek: Internet Terminology |
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A Brief History of the Internet |
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Net Structure |
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Email |
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The Major Search Engines and Directories |
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Sample Searches |
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Assignment |
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Organizing Your Search |
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Booleans |
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Searching in Other Places |
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The Hidden Web |
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Online Communities |
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Conclusions and Summary |
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ISP |
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URL |
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Browser |
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Home Page |
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HTTP |
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FTP |
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HTML |
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Internet/internet |
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Arpanet |
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Intranet |
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WWW |
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Email headers |
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Encryption |
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Carnivore |
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Search Engine/Index |
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Directory |
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Spiders |
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Boolean operators |
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Strings |
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Wild cards |
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Metacrawlers |
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Portal |
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Domain name/TLD |
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Downloads/Uploads |
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Cache |
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Department of Defense |
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ARPANET |
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A “Decentralized Network of Networks” |
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For use in times of war/crisis |
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National Science Foundation |
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The “Backbone” |
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1993 - Marc Andreessen and Mosaic |
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Netscape Communication Corp founded… |
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…and the Web started to become accessible |
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The rest
is, as they say... |
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Networks and Subnetworks |
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LANs and WANs |
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Routers |
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Servers |
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Ubiquitous |
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“Killer app” of the Web |
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Variety of email clients |
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MS Outlook |
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MS Outlook Express |
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Eudora |
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Netscape |
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Web-based email includes |
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Yahoo! |
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Hotmail |
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An e-mail message travels across the Internet
through various computer systems before reaching its final destination. |
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The path followed is unpredictable, dictated by
network traffic at the time and the routers encountered along the way. |
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Emails contain “headers” |
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They tell you the route the mail took to get to
you. |
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Privacy |
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Encryption |
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An encryption package consists of
data-scrambling technology that allows users to e-mail information across
the Internet without misgivings. Through encryption, a message is encoded
so that only its intended recipient can decrypt it. This way, if a message
is scanned or intercepted, it cannot be read. |
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The two main forms of e-mail encryption are PGP
(short for Pretty Good Privacy) and S/MIME (short for Secure Multipurpose
Internet Mail Extensions). |
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(http://www.gfi.com/me/wpencryption.htm) |
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Carnivore |
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According to the FBI: “Carnivore is a
computer-based system that is designed to allow the FBI, in cooperation
with an Internet Service Provider (ISP), to comply with court orders
requiring the collection of certain information about emails or other electronic
communications to or from a specific user targeted in an investigation.” |
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(http://www.robertgraham.com/pubs/carnivore-faq.html) |
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What we call “Search Engines” actually fall into
three categories: |
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Indexes |
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Directories |
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Metacrawlers |
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These are not pure distinctions |
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Most “Search Engines” are hybrids… |
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…and the results contain “commercial content” |
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“Catalog” the Web |
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“Spiders” and “Crawlers” |
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Automated |
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Examples: |
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Google |
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Alta Vista |
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HotBot |
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Northern Light |
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Vast tracts of the Web are unindexed |
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Dynamically-generated pages (DHTML, ASP etc) |
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Academic and institutional databases (eg
Colby-Sawyer library) |
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Many pages under the same domain name |
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“Online communities” like Geocities, Tripod |
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Compiled by humans |
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Are not comprehensive |
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“Editorial judgment” implied |
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Quality vs Quantity |
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Examples: |
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Yahoo! |
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LookSmart |
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Searches sent to several SEs at once |
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Results appear on one page |
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Examples: |
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MetaCrawler |
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Dogpile |
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“Force” an Engine to conduct a search in a
specific way |
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Simple |
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AND + Must Include |
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NOT - Must Not Include |
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OR ¦ Or |
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Alternate Broad and Deep |
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Too Broad = ’000s of Results |
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Too Deep = 0 Results |
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Use Booleans and Strings |
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Searching is becoming both easier and more
difficult |
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The amount of information available is
increasing exponentially |
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So is the number of Search Engines and
Directories… |
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Google |
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http://www.google.com |
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AltaVista |
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http://www.altavista.com |
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HotBot |
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http://www.hotbot.com |
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Northern Light |
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http://www.nlsearch.com |
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FAST Search |
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http://www.alltheweb.com |
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Yahoo! |
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http://www.yahoo.com |
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LookSmart |
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http://www.looksmart.com |
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Dogpile |
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http://www.dogpile.com |
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MetaCrawler |
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http://www.go2net.com |
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Search.com |
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http://www.search.com |
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Notes