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An overview of electronic commerce, focusing on client/server architecture and internet technologies. Topics include tcp/ip, domain naming service, sockets, and the future of the internet (ipv6).
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Electronic Commerce (WS-02/03) 3-
3.1 Client / Server Architecture and the Internet Client / Server Architecture, WWW, Internet Technologies TCP/IP, Domain Naming Service Sockets, Future of the Internet (IPv6) 3.2 Internet Protocols and Internet Infrastructure 3.3 Multi-Tier Architectures 3.4 Platform Choices and Connectivity Options
Electronic Commerce (WS-02/03) 3-
Base Technologies (Internet-, Communication-, Security-, DB-, Software-Technology)
Forms of Payment
Security, Trust
Transact. Control
Agent Technlgy
Mediation, Negotiation EDI
Political and Legal Aspects of EC
Business Process Reengineering (BPR) Tools
Electronic Trading Systems
Virtual Organizations
Kinds of Cooperation
Applications for horizontal and vertical sectors
Technical issues
Organi- zational issues
[MeTuLa99]
Electronic Commerce (WS-02/03) 3-
Motivation: Developing a global distributed hypermedia system. o Started 1989 by a research paper issued by Tim Berners-Lee who worked at the CERN. o 1993: First usable browser (MOSAIC) issued. o 1994: Foundation of World Wide Web Consortium (W3C). o W3C then started developing HTML, HTTP and Style Sheets.
Electronic Commerce (WS-02/03) 3-
Relevant Internet Technologies o Distributed Client / Server Architecture o World Wide Web (WWW, The Web) o Domain Name System (DNS) o TCP/IP, Sockets
Electronic Commerce (WS-02/03) 3-
Systems on the Internet are modeled and realized in a way that allows for equal access to local and remote resources. Examples o Network File System (NFS) o X-Window System o Web - Protocol (HTTP) Abstracting from a net topology
Star
Ring
Distribution is usually only noticed in case of failure (independent system failures)
Bus
Electronic Commerce (WS-02/03) 3-
In the client / server model, all resources are held by servers. Clients issue requests whenever they need to access one of the resources [CDK95]. Examples o A web server (HTTP daemon, http) manages a collection of web (HTML) pages o A web client (HTTP client, a web browser) requests web pages.
Definition
Definition
A server acts as a resource manager for a collection of resources of a given type [CDK95].
A client performs a task that requires access to to some shared hardware and software resources [CDK95].
Electronic Commerce (WS-02/03) 3-
The Internet is the entirety of all connected computers that use the package of internet protocols at their network systems‘ topmost layer. The collection of internet protocols implements a packet-oriented Wide Area Network for connecting networks of diverse protocols and different connection characteristics. The World Wide Web (WWW) is a distributed hypermedia system that relies on some of the internet‘s services. Most important are the naming service provided by the Domain Nam Service (DNS) and the - quite - reliable connection-oriented transmission service provided by the Transmission Control Protocol (TCP) [Wilde99].
Definition
Definition
