DOS
.ZIP - PkZip (most common)
.ARJ - Arj
.LZH - Lha
MAC
.sit - Stuffit Expander
.hqx - Stuffit Expander
.pit - Packit
UNIX
.Z - Compress
.z - Pack
.shar - Shell archive
.tar - Tar
.zoo - zoo210 (various platforms)
At times you may see a file that has two of these extensions. This means that it has been compressed twice using two different programs.
There are various levels to the domain. The two worth noting are the last two levels. In the example above, this would be edu.au
edu tells us what class the host computer is. For example :
au tells us what country the host computer is in. For example :
Note that if there is no two letter code at the end, the host computer is in the United States.
The standard email address is of the form user@hostname
For example, my email address is : caths@srl.rmit.edu.au
Breaking this down tells you:
caths : Username @ : at srl.rmit.edu.au : mail server domain
name edu : class of computer au : country
If you are trying to email someone and you don't have their correct username but you know the host is correct, you can send email to postmaster@hostname, providing as much detail as you can about the person. Hopefully you will receive a response telling you the correct username.
:-) |
Smiley, sometimes seen as <g> or :-> |
:-( |
Sad face |
8-) |
Smiley wearing glasses |
;-) |
A wink |
:-& |
Tongue-tied |
:-o |
A look of shock |
:-p |
Tongue stuck out |
Talking emotions, when you type in ALL CAPITALS on the Internet, people interpret you as SHOUTING at them :-)
Firewalls are common in large universities and organisations, and are becoming more common in schools.
When creating Web pages, you need to use FTP to transfer your files from your local hard disk to a WWW server (or host computer).
There are many HTML tutorials available on the Web. My collegues and I have written several online tutorials to help you learn how to write WWW pages. You will find an index to these and other tutorials located at http://www.srl.rmit.edu.au/pd/
The tutorials relevant to writing WWW pages include :
Doing a search on HTML will give you
a wide variety of resources. Three sites I found
useful when I began teaching myself html were :
Links used to be easily identified as either blue or purple, but people designing WWW pages can now control the colour of the links.
The Internet is made up of lots of sub-systems, including the World Wide Web, FTP, gopher, email, Usenet news, telnet, IRC and WAIS.
Searching for information on the Internet, more specifically on the WWW, is not an easy task. At best, it is a time-consuming and frustrating activity. However, the rewards in terms of the type of information you can access is overwhelming.
As a starting point when using search engines, use as many keywords as possible, separating each keyword with a space. Also use all lowercase letters, unless you are sure that the word would appear with a capital letter.
For example, http://www.srl.rmit.edu.au/pd/index.html specifies that
The address is actually broken down into
A news URL is slightly different in that it does not use slashes (/). For example, news:alt.tv.northern-exp
There are a number of protocols other than http, including :