1 January [email protected]. 321450 Management of Information Technology Chapter 8 Chapter 8...

1 201January 1 201January11

[email protected]@buu.ac.th 11

321450321450 Management Management of of I nf or mat i on I nf or mat i on

TechnologyTechnology

321450321450 Management Management of of I nf or mat i on I nf or mat i on

TechnologyTechnology

Chapter 8Chapter 8

Internet and Information Systems

Asst. Prof. Wichai Bunchua Asst. Prof. Wichai Bunchua- E mail : [email protected] E mail : [email protected]

http://http://www.informaticswww.informatics.buu.ac.th/~wichai.buu.ac.th/~wichai


[email protected]@buu.ac.th 33 3

Why Learn About the Why Learn About the Internet?Internet?Why Learn About the Why Learn About the Internet?Internet?

Internet is an important part of most people’s lives Individuals can investigate career

opportunities Businesses sell and advertise online Employees can communicate with

coworkers and bosses



The InternetThe InternetThe InternetThe Internet

Internet: ?




Internet: a collection of interconnected networks, all freely exchanging information

ARPANET Ancestor of the Internet Project started by the U.S.

Department of Defense (DoD) in 1969




Table 1: A Brief History of the Internet



Internet Hosts Internet Hosts Internet Hosts Internet Hosts



How the Internet WorksHow the Internet WorksHow the Internet WorksHow the Internet Works Internet transmits data from one computer

(called a host) to another If the receiving computer is on a network to

which the first computer is directly connected, it can send the message directly

If the receiving computer is not on a network to which the sending computer is connected, the sending computer relays the message to another computer that can forward it

Data is passed in chunks called packets



How the Internet Works How the Internet Works (continued)(continued)How the Internet Works How the Internet Works (continued)(continued)



How the Internet WorksHow the Internet WorksHow the Internet WorksHow the Internet Works

Transmission Control Protocol (TCP) Transport-layer protocol that most Internet

applications use with IP Internet Protocol (IP):

communication standard that enables traffic to be routed from one network to another as needed

Backbone One of the Internet’s high-speed, long-

distance communications links




Internet Corporation for Assigned Names and Numbers (ICANN) Responsible for managing IP addresses

and Internet domain names Has authority to resolve domain name

disputes Cyber-squatters

Register domain names in the hope of selling them to corporations or people



Domain Name Domain Name Registrations (2000-) Registrations (2000-) Domain Name Domain Name Registrations (2000-) Registrations (2000-)




Accessing the Internet Connect via LAN Server Connect via Dial-up Connect via High-Speed Service Connect Wirelessly



Internet Service ProvidersInternet Service ProvidersInternet Service ProvidersInternet Service Providers

Any company that provides individuals or organizations with access to the Internet

Most charge a monthly fee



เครื�อข่าย ผู้ �ให้�บรื�การืบริ�ษั�ท กสท. โทริคมนาคม จำ�าก�ด (มหาชน)

http://www.cat.net.th/

บริ�ษั�ท อิ�นเทอิริ�เน�ตปริะเทศไทย จำ�าก�ด (มหาชน) http://www.inet.co.th/

บริ�ษั�ท สามาริถอิ�นโฟเนต จำ�าก�ด http://www.samarts.com/

บริ�ษั�ท ท ท แอินด�ท จำ�าก�ด (มหาชน) http://www.ttt.co.th/

บริ�ษั�ท ท โอิท จำ�าก�ด (มหาชน) http://www.tot.co.th/

บริ�ษั�ท ซี เอิส ล็�อิกซีอิ�นโฟ จำ�าก�ด (มหาชน) http://www.csloxinfo.com/

บริ�ษั�ท ทริ$ อิ�นเทอิริ�เน�ต จำ�าก�ด http://www.trueinternet.co.th/

Internet Service Providers Internet Service Providers (continued)(continued)Internet Service Providers Internet Service Providers (continued)(continued)



The World Wide WebThe World Wide WebThe World Wide WebThe World Wide Web




Collection of tens of millions of server computers that work together as one in an Internet

Hyperlink Highlighted text or graphics in a Web

document that, when clicked, opens a new Web page




The World Wide Web was developed by Tim

- Berners Lee at CERN, The European Organization for Neuclear Research in Geneva

[Center Europeane pour la Recherche Nucleaire]



WWW Growth WWW Growth WWW Growth WWW Growth



The World Wide Web The World Wide Web (continued)(continued)The World Wide Web The World Wide Web (continued)(continued)

Hypertext Markup Language (HTML) Standard page description language for Web

pages HTML tags

Let the browser know how to format text Extensible Markup Language (XML)

Markup language for Web documents containing structured information

Cascading Style Sheet (CSS) File or portion of an HTML file that defines the

visual appearance of content in a Web page



The Internet

Client Web Browser

HTTPDWeb Server

Web SiteHTML

Documentindex.html

HTML Documents/Linked Files

REQUEST

Web PageHome Page

http://www.buu.ac.th/index.html

HTTP

HTTP

Web Documentsindex.html

The World Wide Web The World Wide Web (continued)(continued)



Web BrowsersWeb BrowsersWeb BrowsersWeb Browsers

Web browser: software that creates a unique, hypermedia-based menu on a computer screen, providing a graphical interface to the Web Menu consists of graphics, titles, and text

with hypertext links Popular Web browsers: Microsoft Internet

Explorer, Netscape Navigator, Mozilla Firefox, Apple Computer’s Safari

Uniform Resource Locator (URL) An assigned address on the Internet for

each compute



Web Browsers (continued)Web Browsers (continued)Web Browsers (continued)Web Browsers (continued)



Search Engines and Web Search Engines and Web ResearchResearchSearch Engines and Web Search Engines and Web ResearchResearch

Search engine: Web search tool Examples: Yahoo.com, Google.com

Most search engines are free Searches can use words, such as AND

and OR to refine the search Meta-search engine: submits

keywords to several individual search engines and returns results from all these search engines



Search Engines and Web Search Engines and Web Research (continued)Research (continued)Search Engines and Web Search Engines and Web Research (continued)Research (continued)

Table 6 Popular Search Engines



Web Programming Web Programming LanguagesLanguagesWeb Programming Web Programming LanguagesLanguages

Java Object-oriented programming language

from Sun Microsystems based on C++ Allows small programs (applets) to be

embedded within an HTML document Other languages

Asynchronous JavaScript and XML (AJAX) Hypertext Preprocessor (PHP) Adobe Flash and Microsoft Silverlight



Web Programming Web Programming Languages (continued)Languages (continued)Web Programming Web Programming Languages (continued)Languages (continued)

Figure : Downloading an Applet from a Web Server



Developing Web ContentDeveloping Web ContentDeveloping Web ContentDeveloping Web Content

Popular tools for creating Web pages and managing Web sites: Adobe Dreamweaver, Microsoft

Expression Web, and Nvu Popular publishing options:

ISPs, free sites, and Web hosting Mash-up

Process of mixing two or more hip-hop songs into one song

29



Developing Web ContentDeveloping Web ContentDeveloping Web ContentDeveloping Web Content

Suggestions for creating a Web page• Computer must be linked to a Web server• Web browser program needed to view the

HTML pages you create• Options for designing the Web page

• Write your copy with a word processor, and use an HTML converter to convert the page into HTML format

• Use an HTML editor to write text and add HTML tags• Edit an existing HTML template to meet your needs • Use an ordinary text editor and type the start and

end tags for each item



Internet and Web Internet and Web ApplicationsApplicationsInternet and Web Internet and Web ApplicationsApplications

The types of Internet and Web applications available are vast and ever expanding



Business Uses of the WebBusiness Uses of the WebBusiness Uses of the WebBusiness Uses of the Web

In 1991, Commercial Internet Exchange (CIX) Association was established to allow businesses to connect to the Internet

Firms use the Internet for many types of applications



Internet and Web Internet and Web ApplicationsApplicationsInternet and Web Internet and Web ApplicationsApplications

Search engines and Web research Search engines

Have become important to businesses as a tool to drive visitors to the business’ Web site

SEO has become a valuable marketing tool



E-Mail, Instant Messaging, E-Mail, Instant Messaging, and Video Chatand Video ChatE-Mail, Instant Messaging, E-Mail, Instant Messaging, and Video Chatand Video Chat

E-mail No longer limited to simple text

messages Can embed sound and images Can attach files

Instant messaging Online, real-time communication

between two or more people who are connected to the Internet



Internet Cell Phones and Internet Cell Phones and Handheld ComputersHandheld ComputersInternet Cell Phones and Internet Cell Phones and Handheld ComputersHandheld Computers

Cell phones connected to the Internet allow people to search for information, buy products, and chat with business associates and friends

Short Message Service (SMS) or texting Brief text messages can be sent between two or

more cell phone users Handheld computers and other devices are

connected to the Internet using phone lines or wireless connections



Career Information and Job Career Information and Job SearchingSearchingCareer Information and Job Career Information and Job SearchingSearching

Search engines Good starting point for searching for

specific companies or industries Job sites

www.directmarketingcareers.com www.monster.com www.hotjobs.com www.careerbuilder.com

37



Telnet, SSH, and FTPTelnet, SSH, and FTPTelnet, SSH, and FTPTelnet, SSH, and FTP

Telnet Network protocol that enables users to log

on to networks remotely over the Internet Secure Shell (SSH)

Provides Telnet functionality through a more secure connection

File Transfer Protocol (FTP) Supports file transfers between a host and

a remote computer



SSH Secure Shell File Tr SSH Secure Shell File Transferansfer

SSH Secure Shell File Tr SSH Secure Shell File Transferansfer

Upload

Download



Web Log (Blog), Video Log Web Log (Blog), Video Log (Vlog), and Podcasting(Vlog), and PodcastingWeb Log (Blog), Video Log Web Log (Blog), Video Log (Vlog), and Podcasting(Vlog), and Podcasting

Web log (blog) Web site that people create and use

to write about their observations, experiences, and feelings on a wide range of topics

Podcast Audio broadcast over the Internet An audio blog



Usenet and NewsgroupsUsenet and NewsgroupsUsenet and NewsgroupsUsenet and Newsgroups

Usenet Uses e-mail to provide a centralized

news service Topic are called newsgroups Protocol that describes how groups of

messages can be stored on and sent between computers



Chat RoomsChat RoomsChat RoomsChat Rooms

Enable two or more people to engage in interactive “conversations” over the Internet

Internet Relay Chat (IRC) Requires participants to type their

conversation rather than speak



Internet Phone and Internet Phone and Videoconferencing Videoconferencing ServicesServices

Internet Phone and Internet Phone and Videoconferencing Videoconferencing ServicesServices

Internet phone service Relatively inexpensive, especially for

international calls Voice-over-IP (VoIP) technology

Network managers can route phone calls and fax transmissions over the same network they use for data

Internet videoconferencing Supports both voice and visual

communications



Social NetworksSocial NetworksSocial NetworksSocial Networks

Facebook Provides an application development

platform so that technically proficient members can create applications to run within Facebook

The U.S. intelligence community Is adopting social networking to share

information among operatives and analysts Twitter

Allows members to report on what they are doing throughout the day



Facebook Accounts Facebook Accounts Facebook Accounts Facebook Accounts



Media SharingMedia SharingMedia SharingMedia Sharing

YouTube Allows members to post homemade

video content Flickr

Allows members to upload photos to their own personal online photo album and choose photos to share with the community



Social BookmarkingSocial BookmarkingSocial BookmarkingSocial Bookmarking

Purpose To provide a view of the most popular

Web sites, videos, blog articles, or other Web content at any given moment

Popular social bookmarking sites del.icio.us Digg



Content StreamingContent StreamingContent StreamingContent Streaming

Method for transferring multimedia files, radio broadcasts, and other content over the Internet

Enables users to browse large files in real time



Shopping on the WebShopping on the WebShopping on the WebShopping on the Web

Amazon Shorts Has stories that vary in length from

2,000 to 10,000 words Bot (intelligent agent)

Software tool that searches the Web for information, products, or prices



Web AuctionsWeb AuctionsWeb AuctionsWeb Auctions

Web auction A way to connect buyers and sellers

eBay Popular auction site Easy to use and includes thousands of

products and services in many categories Auction sites

Cannot always determine whether the people and companies listing products and services are legitimate



Music, Radio, Video, and Music, Radio, Video, and TV on the InternetTV on the InternetMusic, Radio, Video, and Music, Radio, Video, and TV on the InternetTV on the Internet

Radio broadcasts are now available on the Internet

Video and TV are also becoming available

Internet Protocol Television (IPTV) protocol Used to put TV programming on the

Internet



E-Books and Audio BooksE-Books and Audio BooksE-Books and Audio BooksE-Books and Audio Books

Digital books, both in text and audio form Are growing in popularity thanks to

appealing devices and services Audio books

Have become more popular due to the popularity of the iPod and services like audible.com



Office on the WebOffice on the WebOffice on the WebOffice on the Web

Internet office Web site that contains files, phone

numbers, e-mail addresses, an appointment calendar, and more

Allows your desktop computer, phone books, appointment schedulers, and other important information to be with you wherever you are



Other Internet Services Other Internet Services and Applicationsand ApplicationsOther Internet Services Other Internet Services and Applicationsand Applications

Internet Can provide critical information

during times of disaster Can be used to translate words,

sentences, or complete documents from one language into another

Facilitates distance learning, which has dramatically increased in the last several years



Intranets and ExtranetsIntranets and ExtranetsIntranets and ExtranetsIntranets and Extranets

Intranet Internal corporate network built using Internet

and World Wide Web standards and technologies Extranet

Network that links selected resources of the intranet of a company with its customers, suppliers, or other business partners

Virtual private network (VPN) Secure connection between two points on the

Internet



Intranets and ExtranetsIntranets and ExtranetsIntranets and ExtranetsIntranets and Extranets



Net Issues Net Issues Net Issues Net Issues

Management issues ปรืะเด็�น Preventing attacks

Service and speed issues Keeping up with Internet traffic and traffic

on company intranets Privacy, fraud, security, and

unauthorized Internet sites People and companies are reluctant to

embrace the Internet unless these issues are successfully addressed



SummarySummarySummarySummary

The Internet started with ARPANET Internet Protocol (IP)

The set of conventions used to pass packets from one host to another

Transmission Control Protocol (TCP) Other protocol used with IP

The Web Collection of tens of millions of servers that

work together as one in an Internet service



Summary (continued)Summary (continued)Summary (continued)Summary (continued)

Hypertext Markup Language (HTML) Standard page description language for Web

pages Internet and Web applications include:

Web browsers, e-mail, Telnet, FTP, Web logs (blogs), podcasts, Usenet and newsgroups, chat rooms

Telnet and SSH Enable you to log on to remote computers

Online social networks Provide Web-based tools for users to share

information about themselves with others



Summary (continued)Summary (continued)Summary (continued)Summary (continued)

Intranet Internal corporate network built using

Internet and World Wide Web standards and products

Extranet Network that links selected resources of the

intranet of a company with its customers, suppliers, or other business partners

Management issues, service, and speed affect all networks



Questions?Questions?Questions?Questions?



Assignment#9Assignment#9Assignment#9Assignment#9

9 a . โปรืโตคอล (Protocol) น��นค�ออะไรื โปรืโตคอลห้ล�กข่องอ�นเทอรื!เน�ตค�ออะไรื ท"าห้น�าท#$อะไรื

9 b . เว็�บเบรืาเซอรื!ค�ออะไรื เมื่�$อเรืาเรื#ยกด็ เว็�บเพจ เว็�บเบรืาเซอรื!ท"าอะไรื อยางไรื



ส ว็� ส ด็#

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