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Unformatted text preview: ory by logging into an Archie server and searching for files whose name contains a
specified regular expression. The output is a list of servers with matching filenames. We
then use anonymous FTP to that site to fetch the file.
There are many Archie servers across the world. One starting point is to use Telnet to
ds.internic.net, login as archie, and execute the command servers. This
provides a list of all the Archie servers, and their location.
WAIS: Wide Area Information Servers
Archie helps us locate filenames that contain keywords, but sometimes we're looking for a
file or database that contains a keyword. That is, we want to search for a file that contains a
keyword, not a filename containing a keyword. file:///D|/Documents%20and%20Settings/bigini/Documenti/homenet2run/tcpip/tcp-ip-illustrated/other.htm (5 of 11) [12/09/2001 14.47.58] Chapter 30. Other TCP/IP Applications WAIS knows about hundreds of databases that contain information on both computer-related
topics and other general topics. To use WAIS we select the databases to search and specify
the keywords. To try WAIS Telnet to quake.think.com and login as wais.
Gopher is a menu-driven front end to other Internet resource services, such as Archie,
WAIS, and anonymous FTP Gopher is one of the easiest to use, since its user interface is the
same, regardless of which resource service it's using.
To use Gopher, Telnet into is.internic.net and login as gopher.
Veronica: Very Easy Rodent-Oriented Netwide Index to Computerized
Just as Archie is an index of anonymous FTP servers. Veronica is an index of titles of
Gopher items. A Veronica search typically searches hundreds of Gopher servers.
To access Veronica we must go through a Gopher client. Select the Gopher menu item
"Beyond InterNIC: Virtual Treasures of the Internet" and then select Veronica from the next
WWW: World Wide Web
World Wide Web lets us browse a large, worldwide set of services and documents using a
tool called hypertext. As information is displayed, certain keywords are highlighted, a...
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This test prep was uploaded on 04/04/2014 for the course ECE EL5373 taught by Professor Guoyang during the Spring '12 term at NYU Poly.
- Spring '12