This is a research on the various types of Network Design in IT. The specific one looked at here are the Top-Down Network Design in comparison and contrast to the Plan, Design, Implement, Operate, Optimize (PDIOO). The characteristics that make them different are highlighted as well as the similarities therein and the advantages that each has.
Network Design
Network engineers together with the users develop the ability to deal with network design challenges that prove difficult compared to a similar level they were created. The predicament can lead to network that is complex and challenging to trouble shoot. The situation can also lead to networks that do not function well as required as the significant of scale growth arises hence not matching the requirements of the customer. A solution to such a problem is usage of an organized, top-down network design methodology that concentrates on fulfilling the requirements of a customer, limitations, and goals.
Top-down network design
Top-down network design is a method for planning networks that start at the top layer of the OSI reference model prior to moving to the bottom layers. It concentrates on applications, phases, and data transport done before choosing routers, switches together with media that function at the bottom layers. The top-down network design procedurecomprise exploring divisional as well as group structuresto get the people whom the network offers services and also to get valued information to make the project succeed (O'Kelly, & Miller 1994).Top-down network design is considered interactive and recognizes that the consistent model and the physical strategy change as more data is gathered.Understanding the business goals of a customer and constraints is a serious element of network design.
As network expectations changes network engineers come up with design principles. Many Enterprises do not depend on one vendor, technology inventions or protocol. The design tactic has improved dramatically and comprise of safety and scalability as main criteria. Security has an immense influence on network design.There is larger redundancy in many network designs since the events that took place in September in the year 2001. This has made business continuity a priority. Organizations are concentrating on increased stages of redundancy as well as disaster-recovery initiatives becoming a requirement (Nes, 2003).Redundancy is defined in many forms comprising of different power sources, several WAN carriers, substitute cable routes coupled with redundant hardware. Network connectivity and other services are perilous components of enterprise functions.
The rate of downtime is aggregating at a remarkable rate.Enterprises do not focus on usingone vendor and protocol as many technologies are now consistent. Designing a network is not an insignificant factor. Evaluating the design standards enables a person to understand the network and the functions of the network. Network designs have to adapt easily in implementation of the next generation of technological invention. Many network designers plan to have IP telephony.These network design initiatives are for new networks and helpful in enhancing the existing ones.Proper planning on networks is often based on sound architecture hence makes redesigning of the designs in the future easy.
Stages of the Network
Design is one elementassociated with a network life cycle. Planning, design, implementation, operation, and optimization (PDIOO) are the phasesinvolved in network life cycle. Every stagecreates its precursor to establish a sound network that preserves its efficiencynotwithstandingthe changing business wants. A person can use the PDIOO methodology in all technological inventions.During the PDIOO procedure one has to define main deliverables and related actions with a direct connection to the additional value and advantage for the customer network. For instance, understanding business objectives, usage features, and network necessitieshelps a person avoid pointlesselevations and network redesigns, thus reducing the time taken to introduce fresh services in the network.
Planning Phase
During the planning period one can test the significance of the design for future complications. Planning assists in avoiding repeating a logical faultwhen dealing with a network design that a might person uses as a template in various locations.The planning phase concentrates on technical and financial criteria and considers all the necessities and constraints discussed (Asakura & Kashiwadani 2003).During this stage, it is significant to recognize all the stakeholders to make theprocedure a success. The stakeholders are individuals or organizations who have entrusted interest in the environment, enactment, and result of the project.
Design Phase
After the planning stage, one has enough data to create a network design. If there is a network in place, the phase need to be used to evaluate andauthenticate the network design as it is presently implemented. During this stage a user chooses products and features founded on criteria discussed in defined in the planning stage. A person develops network diagrams to demonstratethe changes that will take place in the network to attain the anticipated results. The more comprehensive the network drawing and plan, the more the challenges are easily anticipated.
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