Chapter 5 Common Internet Tools. How Gophers Work? Internet Gopher: Client software, to find Internet files and other resources easily Organize information.

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Presentation transcript:

Chapter 5 Common Internet Tools

How Gophers Work? Internet Gopher: Client software, to find Internet files and other resources easily Organize information in a logical way Easy to access many types of information Organizations & Universities create gophers Client/Server model Available for PCs, Macintoshes, UNIX, Online Services Root Gopher: Main Menu: Sub Menus Text, binary, graphic, multimedia files Log-ins to remote computer

Telnet Telnet: an Internet resource that lets you to log onto another remote/distant computer (host) Client/ Server Model The “Host” allows many clients to access its resources Hosts are different: UNIX, Macintosh, NT-based computers Menuing System: easier to access resources Terminal Emulation: (VT-100) Telnet Clients are available for all operating systems SLIP/PPP connection: type Telnet then the address

Telnet

How WAIS Works? WAIS: Wide Area Information Server - Search databases - Powerful to fine-tune the search - Be able to retrieve the information & store it Distributed System: lets you to search on all the data distribute among many computers - Client Software: search WAIS databases - Database Library - FAQ - Available with Telnet and Gopher

WAIS

How WAIS Works? WAIS Search: 1. Client Software sends a search request to a WAIS Database 2. The software gets the result (List of documents) before displaying them to users AltaVista: organize WebPages into a database then allow users to search through it

FTP and Downloading Files Transfer Files from computer on the Internet to another computer File types: Programs, graphics, sounds, text FTP Protocol: FTP.FTPFTP.FTP Client/ server Model On the FTP Server: FTP Daemon allows to download files FTP Websites: account number + password File size: large files causes problems in downloading, so on FTP server files are compressed from 10 – 50 percent. After downloading, user can decompress files to use them

FTP and Downloading Files

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