The development of enterprises associated with the development of information technology. When the system and client scale is expanded, information technology infrastructure must also meet this expansion, together with the stringent requirements of performance, scalability, security, redundancy.
Users nowadays not only require access to the resources but also they require for quality and content transmission speeds. These are two factors that greatly affect the ability of users to work. Previously, the only data file in kilobytes but this day is the data file hundreds of megabytes, gigabytes, so if the connection speed is not improved it may not meet with such development.
PRINCIPLES FOR BUILDING A NETWORK
Hierarchical network model
Simple and easy to expand the building, WAN connections, branches, affiliated offices, the new modules such as e-banking, VPN ...
The upgrade or expansion purposes only local changes or areas not connected to the influence of the different functional modules.
The network can be expanded to double or triple which do not affect the structure and original design.
Simple to isolate and troubleshoot. This is a very important thing for large networks of hundreds or thousands of routers (routers).
Redundant network structures
The backup situation prevents the whole system lose touch just because a device malfunction.
Ready for service: Ensuring availability of supply service to customers has become a mandatory requirement for information technology systems.
Safety Data: The data must be protected to ensure the integrity and accessibility. These factors should be considere :
Ensure preventive mechanism
Provision of transmission ( Internet , WAN ... )
Provision of power: The critical equipment assures you use two sources , one source and one source the active reserve.
Virtualized network structure
When building data centers, the next step of centralizing (Data Center Consolidation) is steps virtualization data center (Data Center Virtualization). This stage allows the virtualized data center administrators can create virtual classes, abstraction between the application, system server and network infrastructure. Virtualized network structure When building data centers, the next step of centralizing (Data Center Consolidation) is steps virtualization data center (Data Center Virtualization). This stage allows the virtualized data center administrators can create virtual classes, abstraction between the application, system server and network infrastructure.
Ensure that information security is a critical requirement for network systems. This is another factor to be considered carefully in the design.
The network is divided according to the function blocks and clear areas.
With a large network, including devices, optimizing system will bring many benefits:
Reduce operational risk incident system
Increase the capacity of operating the system
Reducing the demand for investment, upgrading equipment
THE CRITERIA FOR NETWORK DESIGN
- Cost Effectiveness
The overall design model as follows: