Electronic Commerce

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Electronic Commerce

• MIS 6453 -- Spring 2001

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Overview

• Questions . . .
• Comment Citing sources
• Grades
• Projects/Firms
• More on eMetrics Next week
• Forms Essentials
• Networking Overview
• Team Presentations
• F2F
• Virtual Classroom (download file)

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Grades

• Class participation
• SCM chat/outlines
• MISList contributions
• F2F discussions
• Team presentation
• Website exercises
• Remember exam on April 5

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Firms Available for Projects

• Firms participating
• L.A. Darling (taken)
• Gearhead Outfitters
• The Dance Shop
• Executive Hair Designs
• Memphis Light, Gas, Water (taken)
• Now what?
• Bid on the firm you want
• Do some research (firm, industry, etc.)
• Coordinate visit

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Form Concepts

• DOM (Document Object Model)
• Window (the browser display)
• Document (the file being displayed)
• Form (can be more than 1 per document)
• Controls (described by attributes)
• Start/end with ltform . . . gt . . . lt/formgt
• Typical controls
• Input (text, textarea, submit, . . . )
• Button
• Select box (combo box)

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Form Controls

• Input control types
• Text
• Textarea
• Submit
• Radio
• Checkbox
• Use in conjunction with Select/Option

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Using Forms

• Can be attractive, quick means of acquiring
  information
• Send to server/database
• Store as cookie
• Biggest hassle processing at server
• ASP (active server pages)
• CGI script
• E-Mail
• Intelligent agents

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Networking Essentials for eCommerce

• Data transfer
• Bandwidth
• Rates
• Packet switching
• Channels media
• Protocols
• Network services
• Intranets extranets
• EDI

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INFORMATION SUPERHIGHWAY

• NATIONAL / WORLDWIDE
• HIGH SPEED
• DIGITAL TELECOMMUNICATIONS
• ACCESSIBLE BY GENERAL PUBLIC

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SYSTEM COMPONENTS

• COMPUTERS
• TERMINALS (Input / Output Devices)
• COMMUNICATIONS CHANNELS
• PROCESSORS (Modems Multiplexers Front-end
  Processors)
• COMMUNICATIONS SOFTWARE

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PROTOCOL

• RULES PROCEDURES
• TO GOVERN TRANSMISSION
• BETWEEN COMPONENTS
• IN A NETWORK

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COMMUNICATION CHANNELS

• MEANS BY WHICH DATA ARE TRANSMITTED
• TWISTED WIRES (Copper Wires)
• COAXIAL CABLE (Insulated Copper Wires)
• FIBER-OPTIC CABLE
• MICROWAVE

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FIBER OPTICS

• SUPER CLEAR GLASS STRANDS
• FAST, LIGHT, DURABLE
• UP TO TEN BILLION BITS PER SECOND, FULL DUPLEX
• EXPENSIVE, HARDER TO INSTALL
• OFTEN USED AS BACKBONE OF NETWORKS

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LOW-ORBIT SATELLITE
MICROWAVE TRANSMISSION
UPLINK
DOWNLINK
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WIRELESS TRANSMISSION TECHNOLOGIES

• PAGING SYSTEM Small page beeps when receives
  short message
• CELLULAR TELEPHONE Device uses radio waves to
  reach antennas within areas called cells
• MOBILE DATA NETWORKS Radio - based data network
  using hand-held computers. cheap, efficient

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WIRELESS TRANSMISSION TECHNOLOGIES

• PERSONAL COMMUNICATION SERVICE Cellular lower
  power higher frequency. Smaller phones not
  shielded by buildings, tunnels
• PERSONAL DIGITAL ASSISTANT Pen sized, hand-held,
  digital communicator
• SMART PHONE Wireless, voice, text, Internet

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COMMUNICATIONS CHANNELS

• TRANSMISSION SPEED Bits per Second (BPS) or Baud
• BANDWIDTH Capacity of Channel Difference
  between Highest Lowest Frequencies

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SPEEDS COST OF MEDIA
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COMMUNICATIONS PROCESSORS

• FRONT- END PROCESSOR minicomputer manages
  communication for host computer
• CONCENTRATOR computer collects messages for
  batch transmission to host computer
• CONTROLLER computer controls interface between
  CPU and peripheral devices
• MULTIPLEXER allows channel to carry multiple
  sources simultaneously

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LOCAL AREA NETWORK (LAN)

• SERVER stores programs, data determines access
  to network
• GATEWAY connection to other networks
• NETWORK OPERATING SYSTEM (NOS) manages file
  server routes communications on network
• PEER - TO - PEER in some small networks all
  computers have equal power

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WIDE - AREA NETWORK (WAN)

• NETWORK SPANS LARGE GEOGRAPHIC DISTANCES
• CAN INCLUDE CABLE, SATELLITE, MICROWAVE
• SWITCHED LINES Route Determined by Current
  Traffic
• DEDICATED LINES Constantly Available for
  High-Volume Traffic

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NETWORK SERVICES

• PACKET SWITCHING
• FRAME RELAY
• ASYNCHRONOUS TRANSFER MODE (ATM)
• INTEGRATED SERVICES DIGITAL NETWORK
• DIGITAL SUBSCRIBER LINE
• CABLE MODEM
• T1 LINE
• T3 LINE

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PACKET SWITCHING (X.25)

• FORM OF Value Added Network
• BREAKS DATA BLOCKS INTO SMALL PACKETS (e.g. 128
  Bytes)
• PACKETS ROUTED BY MOST ECONOMICAL MEANS
• REASSEMBLED AT DESTINATION

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Packet Switching
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ASYNCHRONOUS TRANSFER MODE (ATM)

• CELL 53 Groups of 8 Bytes Each
• USES FIBER OPTICS CABLE
• INDEPENDENT OF VENDOR HARDWARE SPEEDS
• CAN TIE LAN TO WAN

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INTEGRATED SERVICES DIGITAL NETWORK (ISDN)

• INTERNATIONAL STANDARD FOR TRANSMITTING VOICE,
  VIDEO, DATA
• OVER PUBLIC TELEPHONE LINES

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OTHER SERVICES

• DIGITAL SUBSCRIBER LINE (DSL) enhancing capacity
  over copper telephone lines
• CABLE MODEM modem for cable TV for high-speed
  access to Internet
• T1 LINE dedicated telephone connection, 24
  channels _at_ 1.544 megabits per second

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INTERNETWORKING

• LINK NETWORKS
• EACH RETAINS IDENTITY
• INTO INTERCONNECTED NETWORK

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CONNECTIVITY

• MEASURE OF ABILITY OF COMPUTING DEVICES TO PASS
  SHARE INFORMATION WITHOUT HUMAN INTERVENTION
• OPEN SYSTEMS Software Able to Function on
  Different Computer Platforms. Nonproprietary
  Operating Systems, Applications, Protocols

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ELECTRONIC DATA INTERCHANGE (EDI)

• COMPUTER - TO - COMPUTER
• EXCHANGE BETWEEN TWO ORGANIZATIONS
• OF STANDARD BUSINESS TRANSACTION DOCUMENTS

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Electronic Data Interchange
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Internetworked Organizations
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PROBLEMS POSED BY ENTERPRISE NETWORKING

• CONNECTIVITY
• LOSS OF MANAGEMENT CONTROL
• ORGANIZATIONAL CHANGE REQUIREMENTS
• HIDDEN COSTS OF CLIENT/SERVER COMPUTING
• RELIABILITY SECURITY

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Telecommunications Implementation Factors