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