Internet is a collection of information stored in computers physically located throughout the world.
World Wide Web (WWW) is the universe of Internet-accessible information. It is an initiative started at CERN. WWW uses hypertext and multimedia techniques to make the web easy for anyone to browse, and contribute to.
Netscape is a network navigator that allows retrieval and viewing of World Wide Web multimedia documents. It is compatible with NCSA Mosaic.
NCSA Mosaic (National Center for Supercomputing Applications) software is a distributed hypermedia system designed for information discovery and retrieval over the internet, which is a global network of networks.
Clients are applications that run on your computer. A client hides many of the network details from you (including computer names, ports, and commands). It obtains its information from servers.
Servers are programs running on computers that are reachable via the network. They know where the data and documents are and take care of servicing client queries.
Protocols represent an agreement among different parts of the network on how data is to be transferred.
Syntax:
AccessMethod://host.domain[:port]/path/filename
Examples:
http://info.cern.ch/
file://localhost/users/mike/doc/file.html
ftp://ftp.eff.org/pub/Net_info/EFF_Net_Guide
gopher://gopher.uci.edu/
telnet://hertz.nacs.uci.edu
news:comp.graphics.avs (setenv NNTPSERVER news.service.uci.edu)
Hypertext is a text with link to other texts (files). Files may reside anywhere in the Web address space. Hyperlinks (or links) are highlighted (usually with color and/or underlines) regions of an HTML document that point to another document. A single click on any highlighted phrase with left mouse button will follow a link. Following a link means Mosaic will retrieve the document associated with the selected hyperlink and disply it. Documents can be graphics, movies and sound, so the term "hypermedia", "multimedia hypertext" can be used interchangeably.
Documents on the World Wide Web are written in a simple "markup language" called HTML, which stands for HyperText Markup Language.
MOVEMENT: Down arrow - Highlight next topic
Up arrow - Highlight previous topic
Right arrow, - Jump to highlighted topic
Return, Enter
Left arrow - Return to previous topic
SCROLLING: + (or space) - Scroll down to next page
- (or b) - Scroll up to previous page
OTHER: ? (or H) - Help (this screen)
a - Add the current link to your bookmark file
c - Send a comment to the document owner
d - Download the current link
e - Edit the current file
g - Goto a user specified URL or file.
i - Show an index of documents
m - Return to main screen
o - Set your options
p - Print to a file, mail, printers, or other
q - Quit (Capital 'Q' for quick quit)
/ - Search for a string within the current
document
s - Enter a search string for an external
search.
n - Go to the next search string
v - View your bookmark file
z - Cancel transfer in progress
[backspace] - Go to the history page
= - Show file and link info
\ - Toggle document source/rendered view
! - Spawn your default shell
CTRL-R - Reload current file and refresh the screen
CTRL-W - Refresh the screen
CTRL-U - Erase input line
CTRL-G - Cancel input or transfer