2.5 Project
methodology
"Many network design tools and methodologies in use today
resemble the "connect-the-dots" game that some of us played as
children. These tools let you place Internetworking devices on a palette and
connect them with local-area network (LAN) or wide-area network (WAN) media.
The problem with this methodology is that it skips the steps of analyzing a
customer's requirements and selecting devices and media based on those
requirements". Priscilla Oppenheimer (2004) Good network design must recognize
that a customer's requirements embody many business and technical goals
including requirements for availability, scalability, affordability, security,
and manageability. Many customers also want to specify a required level of
network performance, often called a service level. To meet these needs,
difficult network design choices and tradeoffs must be made when designing the
logical network before any physical devices or media are selected.
1.5. 2.5.1 System Development Life Cycle approach
Methodology
Based on Priscilla Oppenheimer (2004), network
design is divided into some
Major phases. The phases that will be used in this project
are:
Phase 1
Investigation
H
Phase 2
Analysis
Phase 3
Design
Phase 4
Simulation
Figure 2.2: System Development Life Cycle
approach
Phase 1:Investigation
The investigation phase is the most important step in planning a
project; this is to find out everything that will be involved with the project.
During the investigation phase, it discovers that the need for the project such
as what the user's need, doing a site survey. For the buildings and
environment, number of user and everything.
Phase 2: Analysis
This analysis phase is step when committees are formed and
committee members determine what needs to be done. Each committee should create
a task list. For each task, write down the resources required and how long it
will take to complete. This phase is to analyses all the details that have been
gathered in an investigation phase. It will develop analysis strategy;
determine the parameters and the requirement for the project. The analyses are
about user, host, network and functional requirements
Phase 3: Design
This design phase decide the network architecture of the
project. It also include overall system, interfaces, assumptions, nodes and as
appropriate. This deliverables of this phase will be in logical design and
physical design such as network design and diagrams ready to be turned over for
development.
Phase 4: Simulation
In this phase the designs are mapped to the simulation tool.
The configuration for simulation includes the network configuration management,
hardware configuration management and the security of the project. The hardware
and software are installing
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