Transcript presentation source

The Intranet
A local area network (LAN) that is often
used solely within a company or organization.
It uses the same technology as that used
for the Internet.
Statistics indicate that intranets are growing
much more rapidly than than their
internet counterparts.
Other Services Available on the Internet
E-mail: a service that permits one to send a message
another person, a group, or a computer
program
Newsgroups: electronic bulletin boards where
messages can be posted by anyone for anyone
else to read; usually focused on a particular
topic
Listservs: a service that posts messages from registered
members to all other members; unlike bulletin
boards, messages are sent directly to member
e-mail sites.
Other Services Available on the Internet
File Transfer (FTP): used to transfer data files (rather
than messages) between computers; unlike
http, you can upload files to a server
Telenet: allows a user at one site to log in to and run
programs on a remote computer; an example
would be accessing a library’s computerized
data from home
Search Engines: a service that automatically searches
for specified information on remote computers
Other Web-Specific “Languages”
Java: a language like html that is especially powerful
in adding sound, animation, and interactivity to
web pages
Applets: a program written in Java and embedded in
an html document; they run automatically
when the web page is viewed
Active X: a system of controls that can be used to
incorporate external documents -- in their
native formats -- into Web pages; works only
on Windows machines
Other Web-Specific “Languages”
VRML: Virtual Reality Modeling Language -- the
3D language of the Web; it provides Web
pages with three-dimensional data
CGI Scripts: Common Gateway Interface -- a method
of programming web sites for things like
on-line forms; uses script programs that run
on the server computer rather than Java-like
programs which run on client computers
Unix
• An operating system that is used by many servers.
• The server here at NEIU runs on this system.
• You will usually find it on a mainframe computer.
• It’s command set language is pretty complex and
hard to learn (nonintuitive) but it has
proved extremely capable.
Plug-Ins
Sooner or later, you will probably run into the following message:
“This page contains information of a type that can only
be viewed with the appropriate plug-in. What do you
want to do?
Plug-ins are little pieces of software that make special things
happen. They usually can be downloaded for free. Examples:
Real Audio: plays real-time audio files
Shockwave: plays Authorware & Director files
Acrobat Reader: shows files in the Adobe portable
document format (PDF)
Downloading
Downloading: loading a copy of a plug-in or other file from
the web onto your computer
• You need to choose the file that is appropriate for your
type of system.
• You will usually need to uncompress the file after downloading it.
Macs -- Netscape automatically installs StuffIt Expander
PCs -- you must download either Winzip (www.winzip.com)
or PKUNZIP (www.pkware.com)
Extensions Connected with Compression
Macs:
.sit -- compressed; fine for AOL files
.hqx -- binhex; best for Internet
.sit.hqx -- binhex; same as .hqx
.bin -- binary; smaller than .hqx, but you need a full-blown
compression program to uncompress it
.sea -- “self-extracting archive;” will uncompress itself
Extensions Connected with Compression
PCs:
.zip -- “zipped” file or collection of files
.exe -- “executable” program; these are often “selfextracting archives” that will uncompress
themselves when you double-click or use the Run
command
.sea -- “self-extracting archive” that will uncompress itself;
it may be a collection of files in the archive
Organizing Your Web Files
Within the “http” folder in your Web files:
create a folder entitled hrd490 or 390
create a 2nd folder entitled tryouts
Within the hrd folder you will be constructing the
files for your web site. This will include:
individual web pages
all image, sound and other files that will be
incorporated in the different pages
Organizing Your Web Files (cont.)
hrd folder
home.htm
image1.jpeg
syllabus.htm
image2.gif
lectures.htm
links.htm
sound1.wav
Organizing Your Web Files (cont.)
Name the first web page that you want people to go
to in your project :
home.htm
“Home” serves as a default setting -- when someone
writes the address “hrd490” or “hrd390” they will be
automatically connected to this page (home.htm)
* Other default settings you may run into:
index.htm
index.html
default.htm
Naming Your Web Files
• Use all lower case letters
• Use only letters or numbers -- no funny characters
• You can use
~
_
-
.
• Never use a space
• Web pages must end in .htm or .html
• Put an extension (.jpeg, .gif, .tif) at the end of your
graphic file names
• Keep the file name short
Naming Your Web Files -- Other Tips
• Give each file a prefix that indicates
what it is.
• Make sure that all files that belong on
one page start with the same letter.