Lesson 2: Internet and Lesson 2: Internet and the World Wide Web the World Wide Web
Lesson 2: Internet and Lesson 2: Internet and the World Wide Webthe World Wide Web
ObjectivesObjectivesUse a web browser to access a
web pageUse advanced search features to
access information on the internet
Send and receive e-mail
History of the InternetHistory of the InternetThe Internet is actually a child of the
Cold War. This led to ARPANET and ultimately the
Internet of today.In the early days, sending information
via this network was neither particularly rapid nor easy.
Over time, more and more useful utilities and tools were being developed, and as computer hardware dropped in price and commerce became interested, the Net began to spreadSource: http://www.jafsoft.com/misc/course/course_2.html
How the Internet How the Internet WorksWorksThe Internet works by breaking up information into packets of data.
The Internet consists of a network of computers all passing messages to and fro.
How the Internet Works
What is a domain name? Text version of Internet protocol
(IP) address Number that uniquely identifies
each computer or device connected to Internet
How can you connect to How can you connect to the Internet?the Internet?
Slow-speed Technology High-speed Connection
Dial-up accessmodem in your computer uses a standard telephone line to connect to the Internet
Connection must be established each time you log on.
DSL, cable modem,FTTP, fixed wireless, wireless modem, Wi-Fi, and satellite modems
Connection is always on—whenever the computer is running
What is a Web What is a Web Browser?Browser?“A web browser is a software
application for retrieving, presenting, and passing over information resources on the World Wide Web.
It is a software application to accesses information provided by Web servers.
It brings information resources to the user.
Examples of BrowsersExamples of BrowsersInternet ExplorerMozilla FirefoxNetscapeSafariOperaGoogle chrome
Using a BrowserUsing a Browser
Going to a Specific URLWhat is a URL?
Unique address for a Web page
A web server delivers the Web page to your computer
Viewing and Clearing Viewing and Clearing Browser History - FirefoxBrowser History - Firefox
What is a Web Browser What is a Web Browser History?History?
… refers to the list of web pages a user has visited recently—and
associated data such as page title and time of visit—which is
recorded by web browser software as standard for a
certain period of time.
Viewing Browser HistoryViewing Browser History
Creating Creating Bookmarks/Favourites Bookmarks/Favourites With FirefoxWith Firefox
… used to record the address of a website to enable quick access in future.
How do I How do I change change the name the name and and location location of a of a bookmarkbookmark??
What is a Search Engine?What is a Search Engine?
a program that searches for and identifies items in a database that correspond to keywords or characters specified by the user, used especially for finding particular sites on the World Wide Web.
For example, www.yahoo.com and www.google.com
Source: http://www.gcflearnfree.org/searchbetter
Using a Search EngineUsing a Search Engine
The more specific your keywords, the more likely you will find what you want.◦ Phrase Searching:
When you enter a phrase in quotation marks, the search engine matches them exactly.◦ Inclusion/Exclusion Operators:
Plus (+) and minus (-) help narrow search results and filter out unwanted listings.
Basic Search Strategies
Boolean Searching:Boolean logic consists of three operators—AND to combine terms, NOT to exclude terms, and OR to search for similar terms.
Wildcard Searching:Use the asterisk (*) symbol if you do not know the spelling or want to search plurals or variations of a word.
Basic Search Strategies
Title Searching:Searches within the HTML document for the title of a Web page.
Other Search Features:A related search provides links to pages that are related to the selected search results.
Basic Search Strategies
You can also set other search options to sort results, such as by date.
What is What is e-maile-mail?? Short for electronic mail The transmission of messages and files via a
computer network Messages can consist of simple text or can contain
attachments, such as documents, graphics, or audio/video clips
Internet access providers usually provide an e-mail program
Some Web sites—such as Google Gmail, Windows Live Hotmail, and Yahoo! Mail—provide free e-mail services
One of the original services on the Internet
How do you send an e-mail How do you send an e-mail message?message?
What is an What is an e-mail e-mail addressaddress??
Unique name that consists of a user name and domain name that identifies the user
Step 4.When recipient uses e-mail software to check for e-mail messages, the message transfers from incoming mail server to recipient’s computer
Step 2.Your software contacts software on your service provider’s outgoing mail server
Step 3.Software on outgoing mail server determines best route for data and sends message, which travels along Internet routers to recipient’s incoming mail server
Step 1.Using e-mail software, you create and send message
How does an e-mail message How does an e-mail message travel?travel?
Additional ReadingAdditional ReadingClearing Firefox History
AutomaticallyComparing Web BrowsersBookmarking Tutorials
SourcesSourceswww.gcflearnfree.org http://en.wikipedia.org http://www.webopedia.com/TERM https://support.mozilla.org/ http://www.cs.gsu.edu/~wkim/
teaching/csc1010_files/Chapter02.ppt