Transcript E-mail address is

ITGS - introduction
Network
A computer may have:
• a direct connection to a net (cable);
• or remote access (modem).
Connect network to other network
through:
• cables
• wireless, etc
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ITGS - introduction
Internet: Services
What can we do?
• e-Mail
• World Wide Web
• Forum
• Chat
• Game
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ITGS - introduction
Internet: Services
What can we do?
• Send a message
• Study materials
• Download software
• Get medical advices
• Live radio
• Discussions
• Stock market
• Buy & sell
• Information from
libraries
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ITGS - introduction
Internet: Dark side
What are the dark sides?
•
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ITGS - introduction
Internet: World Wide Web
WWW is made up of interlinked
documents called Web pages.
Web pages = text + pictures
Web site = a collection of related web
pages stored on the same computer.
Home page = an entry page of web site.
Web site has a unique address (URL) >.
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ITGS - introduction
Internet: Web site
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ITGS - introduction
Internet: World Wide Web
Uniform resource locator URL (address)
http://www.
Domen
http://www.znanje.org
Hyper >
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ITGS - introduction
Internet: Web site
Contains:
• text
• pictures
• animation
• audio
• video
• Links >
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ITGS - introduction
Internet: Web site
Hypertext system (random jumping)
Reading the pages in own order (Reader)
Hyperlink – link to:
• the same document (Web page)
• the same Web site
• the domain
• any Internet file
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ITGS - introduction
Internet: Web site
How to find your way to back?
Web browser
• Back and forward buttons
• Bookmark or favorites (add to favorites)
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ITGS - introduction
Internet: Search engine
Search engine: Database that catalogs
Web locations based on content
How to find information?
Indexed collection of information stored
in computer.
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ITGS - introduction
Internet: Search engine
To find information:
Type a keyword or keywords into a
search field click a button, and wait a frew
seconds for your Web browser to display
a list of hits. (automatic ranking)
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ITGS - introduction
Internet: Search engine
Another way to use a search engine:
- a directory
- subject tree
a hierarchical catalog of Web sites
compiled by researchers (Yahoo)
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ITGS - introduction
Internet: Search engine
May large Web sites include Search
buttons that enable you to search for sitespecific information.
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ITGS - introduction
Internet: ISP
Connect to the Internet
• ISP
• Education network
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ITGS - introduction
Internet: ISP
Connect to the Internet
• Wire (
• Wireless
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ITGS - introduction
Internet: E-mail
Internet Electronic mail (E-mail):
• User name (login name or alias)
• Mailbox (storage area)
• Inbox ()
• Waiting for send
• Attachment
• Host name
• [email protected]
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ITGS - introduction
Internet Security – Malicious software
Internet Security:
• Spam-unwanted email from unknown
sender)
• Spam filters.
• Hackers (malicious programmers).
• Identity (ID) theft.
• S&E: After receiving spam someone
will ask is using the Internet good or not.
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ITGS - introduction
Word : Missed text
FAQ:
1. Type text
2. Top of text scroll out
 Where is text ?
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ITGS - introduction
File
Social & Ethical issues
Privacy
Content (someone read your
document)
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ITGS - introduction
File
Social & Ethical issues
Integrity
change
Content (hacker change document
or use document)
Content (someone change your
document on your PC)
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ITGS - introduction
PC : Network
Is it possible to connect different
computer networks:
 Yes (which)
 No (why)
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ITGS - introduction
PC : Internet
Hyperlinks can point to Web-pages:
 at the same location (why)
 at location made by the same
author (why)
 at different locations (where you
want)
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ITGS - introduction
PC : Internet
E-mail address is:
 user_ name@host_name
 host_ name@user_name
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ITGS - introduction
PC : Internet
Search engine can search files on
your PC:
 Yes (which)
 No (why)
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ITGS - introduction
PC : Internet
Which type of file we can send as
attachment:
 All
 Someone (which)
 None (why)
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ITGS - introduction
PC : Internet
We can use key on keyboard to return
to the screen previously displayed in
the browser window:
 Yes (which)
 No (why)
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ITGS - introduction
Word : Jumbled the Words
Put them in the correct order :
C
Select
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