Logical Design?

[methodsboy]

hi
-what should be included in the logical design of a network?
Cheers.

[Edmund]

From my notes:

1.7 Logical and Physical Design of a Networked Information System

Logical Design
The logical design of an information system considers the processes to be performed by a proposed solution without regard to any hardware and software requirements. A data flow diagram is used to develop a logical design.

Data Flow Diagrams
A data flow diagram graphically shows the flow of data and processes in a system. The key elements are:
-   Processes, represented circles – Where input data in transformed into information
-   Data stores, represented by parallel lines – A place where data and information is held when not in used (E.g. file server)
-   Data flows, represented by arrows – Direction of the data traveling
-   Entities, represented by squares – Refers to the outside of the system (E.g. a person)

Source and Sinks
A source is an entity that supplies data into the system while a sink is an entity that receives output from the system.

Physical Design
The physical design, which is done after the logical design of the information system, takes into account the hardware and software needed to provide the solution. A block diagram or network diagram can be used to represent the physical design.

Block Diagrams (Network Diagrams)
-   Cables, represented by straight lines
-   Communication devices, represented by icons

http://notes.vcenotes.com/?step=downloader&download=244

[excal]

^ about as good as an explanation as you'd get (either at VCE or University level)...though, there are a metric fuckton of other diagrams you can use for logical designs and that there are also conceptual level designs (not covered in IT:A) which go a step higher.