Transcript Judul

Matakuliah
Tahun
Versi
: M0284/Teknologi & Infrastruktur E-Business
: 2005
: <<versi/revisi>>
Pertemuan 13
Servers for E-Business
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Learning Objectives
• Identify Components of an e-commerce
platform
• Select appropriate platforms for various
situations.
• Distinguish between critical and non-essential
features of an e-commerce architecture.
• List the components necessary for front-end and
back-end of e-commerce transaction systems
• Elicit the steps involved in establishing an ecommerce web site.
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Overview
•
•
Platform = Hardware + basic software
required to run the computer.
Functions of a computer:
1.
2.
3.
4.
Interface logic,
Business application,
Database and
Display.
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Computing architecture
Shift from: Centralized mainframe computing
To: Distributed processing of clients and server
Two-tier architecture:
• Server, at the back end,
• manages the essential functions like disk drives,
• printers, network traffic and some applications.
• Clients’ computers are at the user’s end, mainly personal
computers, which run applications. They display data in
text mode or graphical user interface.
Multi-tier architecture:
• Additional layers of computer servers have been added
between the client and the server in the
• Network.
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Phases of e-commerce
architecture
• First step: Placing the company’s information
about products, prices, promotional schemes
etc. on the web using a web server.
• Second step: Receiving orders, managing
inventory and collecting invoices.
• Third step: Redesigning business process and
supply chain in order to take full advantage of
the technology. (Most challenging part as
multiple components on multiple platforms have
to be integrated). Achieved through Enterprise
Resource Planning, Supply Chain Management
and Customer Relationship Management.
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Basic e-commerce architecture
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Overview of computing Platforms
• In the 1960s –Mainframe computing,
centralized operations
• Next, mini computers
• 1980s – Client/Server architecture
• Presently – heterogeneous Internet
platform.
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Host-Based Platform
• Centralized computing (one main server and many
dummy terminals)
• A single powerful computer server performs all the
important functions.
• Dummy computer terminals are at the other end, used
for requesting a task or displaying results.
• No processing is done at the dummy terminals. Only
display is done here.
• A database engine on the server provides shared data
processing functions to all other applications.
• Jobs are executed in batches.
• Often, Front-end processor (FEP) is inserted between
the two computers for connection and authorization
services.
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Client/Server Platform
• Distributed computing (between one
server and many clients).
• In a traditional C/S system, the server
performs only database function, while the
client carries out the other three.
• Fat client- display + interface logic,
business application, significant amount of
database processing.
• Thin client- display + interface logic only
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Host Vs Client server systems.
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Differences between a host-based
system and a C/S system
• Client in a C/S system is a much powerful
computer, usually a personal computer or
computer workstation.
• Client performs larger amount of functions.
• The interface in C/S system through graphical
user interface.
• Depending on the application, the network
capacity may be high or low.
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Technologies used on the local
area networks include
• Communication protocols: Transmission
Control Protocol/ Internet Protocol
(TCP/IP), Novell network protocol
(SPX/IPX), Sequenced Package
Exchange (SPX).
• TCP/IP - a suite of communications
protocols used to connect hosts on the
Internet.
• In-built into UNIX operating systems, SUN
Solaris and Linux.
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World Wide Web Platform
• WWW - a subset of wide area network.
• Private or leased lines for implementing C/S system in a
wide area network.
• WWW is a vast distributed network of millions of servers
where information is stored and which can be accessed
and retrieved from other computers.
• Language used for web pages – HTML (Hyper Text
Markup Language)
• TCP/IP followed for sharing and sending of data from the
web servers to the browsers at the client’s end.
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WWW as an special case of C/S system
• a n-tier distributed C/S system.
• Web servers – dedicated machines acting
as repositories for web pages. Web
servers consist of hardware, O.S., web
server software..
• At the client’s end, the software required to
view the web pages on personal computer
is called a browser.
• Browsers – Netscape Navigator, Microsoft
Internet Explorer, and Opera Browser, and
mobile micro-browser.
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Internet mechanism
• In WWW, any web server on any platform can
interact with any browser running on any client
machine connected through the Internet.
• Linking the clients and server through dial-up
connection, a privately leased line, digital
subscriber line (DSL) or cable modem.
• Access to the internet provided by Internet
Service Providers like AOL, CompuServe,
Prodigy or Telephone companies.
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Internet – fig 6-4
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Components of an e-commerce
website
1. Informational website hosted on a web
server on the company’s side
2. Web server on the visitor’s side
3. Access to e-mail for both the business
and the client
4. the core editing/development tools
associated with the platform.
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Fig 6-5 heterogeneous system.
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Additional functionalities of the
website
• Secure transactions using sophisticated
software and hardware.
• Links to back-end processing.
• Links to external credit-checking and
payment processing centers.
• Delivery mechanism linking to the
warehouse and shipping center.
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Complex e-commerce architecture
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Enterprise Resource Planning (ERP), Supply
Chain Management (SCM),
Customer Relationship Mgmt (CRM)
provide competitive advantage to a firm vis a
vis its competitors today.
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Fig 6-7 Integrated e-business
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