Transcript Chapter 8 notes - Personal.psu.edu

THE INTERNET
e-Commerce
and
e-Business
8.1
PROTOCOL
RULES & PROCEDURES
TO GOVERN TRANSMISSION
BETWEEN COMPONENTS
IN A NETWORK
8.2
INTERNET TERMS
• HYPERTEXT TRANSPORT PROTOCOL
(HTTP): communications standard used to
transfer Web pages, defines how msgs are
formatted and transmited.
• HYPERTEXT MARKUP LANGUAGE
(HTML): programming language for
creating Web sites – browsers interpret
Hypertext: non-linear writing in which you follow
associative paths through a world of textual documents
(www uses hyperlinks)
8.3
Internet Client / Server Applications
Application
Protocol
E-Mail
SMTP, POP3
Purpose
Allows transmission of text msgs
and attachments across internet
File Transfer
FTP
Enables files to be uploaded and
downloaded across the internet
Chat
Internet relay Provides way for users to talk in real
chat protocol time over internet.
(IRC)
WWW
(browser)
8.4
HTTP
Transfers web pages
TCP / IP Architecture
Protocol Layers
Functions
Application
HTTP, FTP, IRC
SMTP, POP3
Transport
TCP
Internet
IP
Network interface /
Hardware
8.5
NIC
Message Flow Between a Web Client and Server
Primary Functions:
Client: request services,
Web Server:
Printing / info retrieval
service HTTP requests
DB
ERP
Tier 1
8.6
Tier 2
Tier 3
INTERNET TERMS
• HOME PAGE: WWW screen display
welcomes user to organization’s page
• WEBMASTER: Person in charge of Web
site
• INTERNET SERVICE PROVIDER (ISP):
organization connected to Internet, leases
temporary connections to subscribers
• UNIFORM RESOURCE LOCATOR (URL):
Address of specific Internet resource
8.7
INTERNET ADDRESS
Domain Name
http://www.psu.edu
PROTOCOL FOR THE
WEB
EXTENSION
Com - commercial
Edu
Net – network serv
Gov
Org - nonprofit
URL
8.8
SEARCHING THE WEB FOR INFORMATION
• SEARCH ENGINE: tool for locating
specific sites or information on
WWW
Web sites are not automatically “found” by search
engines… you must “submit” your site to the
search engine. Your site will then be added to the
search engine “index” as described on the next
slide.
8.9
Search Engines
Contains three major parts
1. Spider, crawler, or bot – searches the
Web site (once it is submitted)
2. Index – catalogs what is found
3. Search engine utility – provides
search results
Note: Steps 1 & 2 occur when you “submit” your site to the search engine
And step 3 occurs when some one searches for words using the search engine.
Altavista
Yahoo
Lycos
Excite
Hotbot
Go.com
8.10 Webcrawler
www.submit-it.com
INTRANET
• INTERNAL NETWORK
• WWW TECHNOLOGY (use browser)
• FIREWALL: Security System to Prevent
Invasion of Private Networks
• OVERCOMES COMPUTER PLATFORM
DIFFERENCES
• INFRASTRUCTURE in place if
PC’s on LAN
• Low-cost way to distribute corporate
information
8.11
BENEFITS OF INTRANETS:
• CONNECTIVITY
• CAN BE TIED TO LEGACY SYSTEM
• INTERACTIVE APPLICATIONS WITH
AUDIO, VIDEO (Jack W. web cast)
• EASY TO USE BROWSER INTERFACE
• REDUCED INFORMATION DISTRIBUTION
COSTS
8.12
EXTRANET
DATABASES
CUSTOMER
SUPPLIER
INTERNET
FIREWALL
SERVER
BUSINESS
PARTNER
CLIENTS
Allows select users access
8.13
INTERNET BENEFITS
• GLOBAL CONNECTIVITY
• REDUCED COMMUNICATIONS
COST (vs Private WAN or VAN)
• LOWER TRANSACTION COSTS
PO / Cust. Ord / Cust. Service
• ACCELERATED KNOWLEDGE
O/L resources, wizards maintenance and troubleshooting
• INCREASE SALES OPPORTUNITIES
8.14
B2B E-COMMERCE
• AUTOMATION OF PURCHASE, SALE
TRANSACTIONS FROM BUSINESS
TO BUSINESS
• ELECTRONIC DATA INTERCHANGE
(EDI)
• EXCHANGES: Commercial on-line
market, many buyers, sellers
• Forward auctions – disposition of
excess inventory
• Reverse auctions - purchases
8.15
ELECTRONIC COMMERCE
SUPPORT SYSTEMS
• WEB HOSTING SERVICES: provides
large servers for Web sites – fee
paying customer
LIST BENEFITS
• ELECTRONIC PAYMENT SYSTEM:
using Web for electronic funds
transfers, credit , smart & debit cards
8.16