Transcript Week 4: Monetary Transactions in Ecommerce

Week 4: Monetary Transactions
in Ecommerce
Chapter 3 of Amor Text
“Selecting the Technology”
Virginia F. Kleist, Ph.D.
Chapter 3
Chapter 3 is about the hardware and software
infrastructure that enables the electronic
commerce web application to operate. This
chapter covers the basics of the internet
communications architecture, IP addresses,
software and some middleware applications. This
chapter, together with Chpt. 14, covers the
fundamentals of the tools that are required to build
a viable web presence, infrastructural, software
and payments mechanisms. The course has a
managerial component, a technology component
and a programming component, and these two
chapters are related to the technology component.
Outline of Chpt. 3 Amor text
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Internet networking
Exploring the IT infrastructure
Deciding on the Enterprise Middleware
Choosing the Right Enterprise Applications
Building the E-Business Applications
Speeding up the Internet
3.1 Internet Networking
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3.1.1 The internet infrastructure
3.1.2 The Internet architecture
3.1.3 The internet protocol suite
3.1.4 The domain name system
3.1.5 IPv6
3.1.6 ATM Networks
Sender
Figure 5-1 TCP/IP’s 5-Layer Network Model
Application
Layer
Transport
Layer
Network
Layer
Data Link
Layer
Physical
Layer
Receiver
(note: from Fitzgerald and Dennis, 2002)
HTTP
Request
TCP HTTP
Request
IP
TCP HTTP
Ethernet IP
Application
Layer
Transport
Layer
Request
TCP HTTP
Request
Network
Layer
Data Link
Layer
Physical
Layer
HTTP
Request
TCP HTTP
Request
IP
TCP HTTP
Ethernet IP
Request
TCP HTTP
Request
University of Toronto
(note: from Fitzgerald and Dennis, 2002)
1. DNS Request to local server
6. DNS Response to client
UT DNS
Server
UT LAN
Client
computer
2. DNS Request to .edu server
5. DNS Response to UT server
Root DNS Server
for .EDU domain
Internet
3. DNS Request to IU DNS server
Indiana University
IU DNS
Server
IU LAN
4. DNS Response to .edu server
Figure 5-7 How the DNS works
Transmission Control Protocol/Internet
Protocol (TCP/IP) (note: from Fitzgerald and Dennis, 2002)
• Developed in 1974 by Vint Cerf and Bob
Kahn as part of the Arpanet network
developed for the US Defense Department.
• TCP/IP is the protocol used by the Internet.
• Almost 70% of all backbone, metropolitan
and wide area networks use TCP/IP.
• In 1998, TCP/IP surpassed IPX/SPX to
become the most common protocol on local
area networks.
Introduction: The Network and Transport Layers
(note: from Fitzgerald and Dennis, 2002)
• The transport layer is responsible for end-to-end delivery
of outgoing messages from the application layer.
• The transport layer sets up virtual circuits (when
needed) and is also responsible for segmentation
(breaking the message into several smaller pieces) at the
sending end and reassembly (reconstructing the original
message into a single whole) at the receiving end.
• The network layer is responsible for addressing and
routing of the message.
• The network and transport layers also perform
encapsulation of message segments from the application
layer, passing them down to the data link layer on the
sending end and passing them up to the application layer
on the receiving end (see Figure 5-1).
IP Address Ipv4
• Class A networks 16,777,216 IP addresses
• Class B networks 65,536 IP addresses
• Class C networks 256 IP addresses
Types of addresses
(note: from Fitzgerald and Dennis,
2002)
Address
Example Software
Application Layer
Network Layer
Data Link Layer
Web browser
TCP/IP
Ethernet
Example Address
www.cba.uga.edu
128.192.98.5
00-0C-00-F5-03-5A
IPv4 Addresses
(note: from Fitzgerald and Dennis, 2002)
• IPv4, uses 4 byte (32 bit) addresses which is really
a string of 32 binary bits.
• To make IP addresses easier to understand for
human readers, dotted decimal notation is used.
• Dotted decimal notation breaks the address into
four bytes and writes each byte values digital
equivalent.
• An of an IP address in dotted decimal notation
would be: 128.192.56.1
Figure 5-12
(note: from Fitzgerald and
Dennis, 2002)
3.2 Exploring the IT
Infrastructure
• 3.2.1 The platform
• 3.2.2 Basic internet software
3.3 Deciding on the Enterprise
Middleware
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3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
Mail and collaboration
Network and Systems Management
Security software
Payment solutions
Database Management systems
High availability
3.4 Choosing the Right
Enterprise Applications
• 3.4.1 Software trends
• 3.4.2 Imaging technologies
• 3.4.3 Content preparation: HTML, web page editors,
content management,graphics software, multimedia tools, sound
software
• 3.4.4 Data warehousing:
consolidated views, descriptive
terms, preprocessed data, normalization of data
• 3.4.5 Enterprise Resource Planning
• 3.4.6 Call center solutions
3.5 Building the E-Business
Application
• 3.5.1 Putting the building blocks together
• 3.5.2 Integrating the enterprise
• 3.5.4 Solutions to integration: Point to point,
database to database, federated databases, brokering,
composite application, process automation
• 3.5.5 Selecting the right EAI Technology
3.6 Speeding up the Internet
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3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
Introduction
Content delivery management
Bandwidth conservation
Quality of service
Caching