lecture 3 internet

7/29/2019 Lecture 3 Internet

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Internet & The World


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the Internets hIstory 1969 ARPANET

Developed by the Department of Defense

Connected universities and defense bases

1973 ARPANET connects to Europe


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ARPANET 1973


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the Internets hIstory Mid-1980s NSFNet

Network between supercomputers

Internet was the link to ARPANET No commercial traffic allowed

1990s

ARPANET shut down

NSFNet abandoned

Commercial networks take over


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Today and the Future 100,000 new web sites per month

More than 50% households online

Access is available throughout the country


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India Internet Growth


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the Internets Major servIces The World Wide Web (WWW)

Developed in 1993 by Tim-Berners Lee

Allowed connection of documents Required a browser to read documents

Electronic mail (e-mail)

Instantaneous transmission of documents


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the Internets Major servIcesNews

Often called newsgroups

Electronic discussions on several topics

File Transfer Protocol (FTP)

Sends and receives files


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the Internets Major servIces Chat

Public real time conversation

Instant messaging Private real time conversation

Peer-to-peer services

Allows sharing of files among users Napster and Kazaa are examples

Illegal to share copyrighted material


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Accessing The Internet Internet Service Provider (ISP)

Company that provides Internet access

Dialup Connects to Internet through phone line

Modem connects to the phone line

Slow connection


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Accessing The InternetHigh-speed access

Connect through a special line

2 25 times faster than dialupDSL, Cable, T1 are common


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Understanding the Internet The Internet allows accessing resources

The Web simplifies the Internet

The Web connects documents Hypertext creates links between documents

Documents are stored on a web server

HTTP delivers documents


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Understanding the Internet Web site is a collection of documents

Document is a web page

Pages are published to the web Hypertext Markup Language

Creates web pages

Describes how pages should look

Content enclosed in tags

content


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Understanding The Internet Browsers

Read and translate the HTML

Display web content Uniform Resource Locator (URL)

Address of a web page


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Understanding The Internet Helper applications

Plug-ins

Enhance a browsers functionality Streaming audio and video

Sends the file in small chunks

Chunks downloaded while others play


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Streaming Audio


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Using a Browser And TheWWWBrowser starts on the home page

Navigating the web

Enter a URL in the browser

Click a link

Links are typically blue underlined words

Image maps are picture links

When finished, close the browser


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Searching the WebThe Web is unorganized

Directories

Categorize the Internet

Search engines

Find sites by keyword


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Searching the WebSite searches

Large sites have an internal search

Metasearch sitesSearch several web sites at once

Sponsored links

Sites pay for better search results


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Search TechniquesQuote the exact phrase

Use the keyword AND

Use the keyword NEAR

Avoid common words

Use the sites advanced tools


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E-mail and OtherInternet Services


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Using E-mailExchanges messages with other users

Messages reach destination in seconds

Mail waits in mailbox until openedText, audio, pictures and video messages


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Using e-mailConfiguring e-mail

e-mail clients read and send e-mail

Outlook and Eudora are common Need name of mail server

Need username and password

Hotmail and Yahoo are online clients

No configuration needed


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Using e-maile-mail addresses

Unique address

Allows sending and [email protected]

Listserv

Lists of e-mail addressesEach address gets the e-mail


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Using e-maile-mail actions

Create a new message

Send an attachmentReply to e-mail

Open attachments

Forward an e-mail


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Other Internet FeaturesNews

Public board devoted to a topic

Thousands of topics availableMessages are called threads

Users can create threads

Users can comment on threadsNeed a news reader program


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Other Internet FeaturesFile Transfer Protocol (FTP)

Copies files from a remote computer

FTP client is needed Some sites require a password


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Other Internet FeaturesInternet Relay Chat (IRC)

Real time communication system

Multi-users with many channels (rooms)Channels are dedicated to a topic

All users can read the comments


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Other Internet FeaturesInstant messaging (IM)

Private, real-time communication

Message sent only to listed usersBuddy lists contain IM names


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Other Internet ServicesOnline services

Company that offers access by

subscriptionBanks, games and research

America Online offers content and Internet


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Other Internet ServicesPeer-to-peer (P2P) services

User computers are connected together

No centralized organizationUsers can communicate directly

Users can share files


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Email Quiz


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Why shouldn't I type my e-mails in all caps?

a) All caps insinuates you are yelling or

screaming.

b) It makes you look lazy and/or uneducated.c) It is a strain on your eyes, makes reading e-

mail more difficult.

d) All of the above.


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Why should I use the BCC field?a) So I can send copies of business e-mail to my

friends without my boss knowing.

b) To keep my e-mail looking clean.

c) To respect my contact's privacy.

d) So I can send copies to anyone I want.


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When should I update my virus software?a) Once each day.

b) Once a week.

c) Every time I log on.

d) Only when my ISP tells me to.


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Before sending a very large attachment, Ishould:

a) Compress the file (zip it up).

b) Send it first thing in the morning and call tomake sure it was received.

c) Send it during week days.

d) Compress the file, then ask first when would be

the best time to e-mail it.


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I should only forward e-mail when:a) I feel it's important.

b) I know the other person should have the

information.

c) The topic is commendable and important to allonliners.

d) I type a personal comment about why I am

forwarding that specific e-mail to that specific

person.


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When is it O.K. to contact folks about mybusiness?

a) Only when they e-mail me and ask me for

information.

b) When I know they can use my service.c) When I know I can save them big bucks!

d) Anytime - that's called cold calling.


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I should down edit my e-mail replies by:a) Removing previous signature files.

b) Removing the previous 2 e-mails noted in my

reply.

c) Removing everything not necessary to theongoing conversation.

d) Spell checking the sender's previous e-mail.


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What is the most important thing I should dowith every e-mail?

a) Spell check, use full sentence structure and

use proper grammar.

b) Have a nice greeting: Hi, Hello, etc.c) Have a proper sign off: TIA, Sincerely, etc.



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How quickly should I reply to e-mail?a) As soon as I can; no longer than 24-48 hours.

b) When I get around to it.

c) I don't have to reply.

d) Doesn't matter.


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Before e-mailing a Web site for assistance,the first step I should take is:

a) Double check my e-mail address is correct.

b) Get all my questions together and only send

one e-mail.c) Make a reasonable effort to ensure the info I

seek is not already covered on the site.



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Presentation Topics (Group-wise)1. Knowledge Management2. HRMS

3. E-Marketing

4. Web-Conferencing & Web Conferencing

Services5. Sales force Automation system

6. Supply Chain Management

7. Enterprise Resource Planning

8. Customer Relationship Management9. Cloud Computing

10. Data mining & Data Warehousing