CISB113 Fundamentals of Information Systems Telecommunications & Network.

CISB113 CISB113 Fundamentals of Information Fundamentals of Information

SystemsSystems

Telecommunications & NetworkTelecommunications & Network

Learning OutcomesLearning Outcomes

At the end of this lesson, you should be able to:• Describe the values of telecommunications

and networks to business• Describe the common elements of

telecommunications and network

• Telecommunications networks now play a vital and pervasive role in business, supporting :

• E-business

• E-commerce

• Enterprise collaboration

• Other applications that support management and strategic objectives

Business Application TrendsBusiness Application Trends

The Difference …The Difference …

E-BusinessE-Business

e-Business refers to the automation of an organization's internal business processes using the Internet and browser technologies.

E-CommerceE-Commerce

e-Commerce refers to the conduct of commerce or business electronically

– Commercial transactions over the Internet only

– buying and selling via the Internet.

Values of Telecommunications Values of Telecommunications and Networkand Network

• A computer network consists of two or more computers intended to share resources.

• In the world of computers, networking is the practice of linking two or more computing devices together for the purpose of sharing data. Networks are built with a mix of computer hardware and computer software.

NetworkNetwork

• The Internet is a global network connecting millions of computers. More than 100 countries are linked into exchanges of data, news and opinions. According to Internet World Stats, as of December 31, 2011 there was an estimated 2,267,233,742 Internet users worldwide. This represents 32.7% of the world's population.

• Internet Service Providers– A company that specializes in providing easy access to the

Internet

– For a monthly fee, provides software, user name, password, and Internet access

InternetInternet

http://www.webopedia.com

• Most popular Internet applications and uses– E-mail

– Instant messaging

– Browsing the Web

– Newsgroups

– Chat rooms

– Publish opinions, subject matter, creative work

– Buy and sell

– Downloading (data, software, reports, pictures, music, videos)

Internet ApplicationsInternet Applications

Internet ApplicationsInternet Applications

Business Value of InternetBusiness Value of Internet

• An intranet is a private network that is contained within an enterprise

• This is a network that is not available to the world outside of the Intranet.

• For example, consider an office with a few PCs and a few printers all networked together. The network would not be connected to the outside world. On one of the PCs there would be a directory of web pages that comprise the Intranet. Other PCs on the network could access this Intranet by pointing their browser to this directory

IntranetIntranet

http://www.hcidata.info/inet.htm

• Many companies have sophisticated and widespread intranets, offering…– Detailed data retrieval– Collaboration– Personalized customer profiles– Links to the Internet

• Intranets uses Internet technologies– Web browsers and servers– TCP/IP network protocols

– HTML publishing and databases

IntranetIntranet

Intranet as Information

Portals

• An Extranet is actually an Intranet that is accessible to authorised outsiders. The actual server (the computer that serves up the web pages) will reside behind a firewall. The firewall helps to control access between the Intranet and Internet permitting access to the Intranet only to people who are suitably authorised.

ExtranetExtranet

http://www.hcidata.info/inet.htm

• Web browser technology makes customer and supplier access to intranets easier and faster

• Another way to build and strengthen strategic relationships

• Enables and improves collaboration between a business, customers, and partners

• Facilitates online, interactive product development and marketing

Business Values of ExtranetBusiness Values of Extranet

• Peer-to-peer

• Client/Server

• Wide Area Network

• Local Area Network

• Virtual Private Network

Types of Communications Types of Communications NetworkNetwork

• a peer-to-peer (P2P) network is created when two or more PCs are connected and share resources without going through a separate server computer

Peer-to-Peer NetworkPeer-to-Peer Network

• A computer network is referred to as client/server if (at least) one of the computers is used to "serve" other computers referred to as "clients". Besides the computers, other types of devices can be part of the network.

Client/Server NetworkClient/Server Network

• A Local Area Network (LAN) is a network that is confined to a relatively small area. It is generally limited to a geographic area such as a lab, school, or building.

Local Area NetworkLocal Area Network

• Telecommunications Network that covers a large geographic area

Wide Area Network (WAN)Wide Area Network (WAN)

• A virtual private network (VPN) extends a private network across a public network, such as the Internet.

• It enables a computer to send and receive data across shared or public networks as if it were directly connected to the private network, while benefitting from the functionality, security and management policies of the private network

Virtual Private Network (VPN)Virtual Private Network (VPN)

Wikipedia.com

Learning OutcomesLearning Outcomes

At the end of this lesson, you should be able to:• Describe the values of telecommunications

and networks to business• Describe the common elements of

telecommunications and network

Take Home ExerciseTake Home Exercise

• You are to answer all of the questions in the next page.• For questions that you are not able to find answer in the

slides, please conduct your own research to find the answer.• Type, print and submit your answer on the 23rd August 2013,

by 5 PM.• Please do not simply copy and paste the description from the

slides as the answers to your question, please make an attempt to explain using your own sentences based on your understanding of what the slides have stated.

Questions on next page

1. Describe e Business. 2. Describe e Commerce3. Explain in what way can telecommunications and network help to overcome the cost

barrier in organization4. What is a network?5. What is Internet?6. What is Intranet?7. What is Extranet?8. Explain one of the business values of Extranet9. Explain the five types of communication networks:

a) Peer to Peerb) Client/Serverc) LANd) WANe) VPN

10. Explain Firewall

Answer all questionsAnswer all questions

Learning OutcomesLearning Outcomes

At the end of this lesson, you should be able to:• Describe the values of telecommunications

and networks to business• Describe the common elements of

telecommunications and network