TCP IP Illustrated

304 archie wais gopher veronica and www the tools that

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Unformatted text preview: lass B address 140.252. White Pages file:///D|/Documents%20and%20Settings/bigini/Documenti/homenet2run/tcpip/tcp-ip-illustrated/other.htm (4 of 11) [12/09/2001 14.47.58] Chapter 30. Other TCP/IP Applications Using the VRFY command of SMTP, along with the Finger protocol and the Whois protocol to locate users on the Internet is similar to using the white pages of a telephone book to find someone's phone number. At the present time ad hoc tools such as these are all that's widely available, but research is under way to improve this type of service. [Schwartz and Tsirigotis 1991] contains additional information on various white pages services being tried on the Internet. The particular tool, called Netfind, can be accessed by using Telnet to either bruno.cs.colorado.edu or ds.internic.net and logging in as netfind. RFC 1309 [Weider, Reynolds, and Heker 1992] provides an overview of the OSI directory service, called X.500, and compares and contrasts it with current Internet techniques (Finger and Whois). 30.4 Archie, WAIS, Gopher, Veronica, and WWW The tools that we described in the previous two sections-Finger, Whois, and a white pages service-are for locating information on people. Other tools exist to locate files and documents, and this section gives an overview of these tools. We only provide an overview, because examining the details of each tool is beyond the scope of this book. Methods are given for accessing these tools across the Internet, and you are encouraged to do so, to find which tool can help you. Additional tools are continually being developed. [Obraczka, Danzig, and Li 1993] provide an overview of resource discovery services on the Internet. Archie Many of the resources used in this text were obtained using anonymous FTP. The problem is finding which FTP site has the program we want. Sometimes we don't even know the exact filename, but we know some keywords that probably appear in the filename. Archie provides a directory of thousands of FTP servers across the Internet. We can access this direct...
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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.

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