FIT2001 Lecture Notes - Lecture 8: Local Area Network, Software Architecture, Computer Network

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L8 - Essentials of Design & Build vs. Buy, Outsourcing
What is Design?
The bridge from requirements to solution. Focuses on how the system will be built and what the
structural components of the new system will be.
What Components are Required to Design the System?
Network Diagram - shows how the application is deployed across networks and computers using
the major components of System Design.
What are Inputs to and Output of Design Process?
Inputs = Analysis Models Outputs = Design Models
Design Activities
Design the Environment
The environment represents the infrastructure on which a software will operate. It includes
hardware, system software, O/S databases, communication network etc
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Internal Network Terminology
Local area network - a computer network in which the cabling and hardware are
confined to a single location
Client-Server Architecture - a computer network configuration with user’s
computers and central computers that provide common services
Client Computers - the computers at which the user's word to perform their
computational tasks
Browser-based internal network
HTML - language for construction web pages. Consists of tags and rules
about how to display pages
TCP/TP - foundation protocol of the Internet. Used to provide delivery of
messages between networked computers
Design for Internal Deployment
Stand alone systems - run on one device without networking
Internal network-based systems
LAN - exclusive use of the organisation, client-server architecture
Desktop application & browser based applications
Three-layer client server architecture - desktop & browser based applications
Design for External Deployment
Configuration for External Deployment
Advantages
Disadvantages
Accessible to many potential
users
Low cost communication
Widely implemented standards
Security risk to due to global
pool of hackers( improved by
HTTPS)
Throughput - high loads can
reponse time suffer
Changing standards - rapid
changes in tech and
functionality
Hosting Alternative for Internet Deployment
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Document Summary

L8 - essentials of design & build vs. buy, outsourcing. Focuses on how the system will be built and what the structural components of the new system will be. Network diagram - shows how the application is deployed across networks and computers using the major components of system design. The environment represents the infrastructure on which a software will operate. It includes hardware, system software, o/s databases, communication network etc. Local area network - a computer network in which the cabling and hardware are confined to a single location. Client-server architecture - a computer network configuration with user"s computers and central computers that provide common services. Client computers - the computers at which the user"s word to perform their computational tasks. Html - language for construction web pages. Consists of tags and rules about how to display pages. Tcp/tp - foundation protocol of the internet. Used to provide delivery of messages between networked computers.

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