project-simulation
Fall 2016 Simulation Project
Name
Institution
Network design methodology
The top- down network design is a method of designing networks which starts at upper layers of OSI reference model before moving to lower layers. It concentrates on applications sessions, data transport before selecting routers, media and switches that work at lower layers. This network design process includes exploration of group and divisional structures to get people for whom network will offer services and whom you must get valuable information to enable the design to succeed.
The network design method presentation on this part is derived from Cisco prepare plan. This involves design, implement, operate and optimize methods that reflect a network lifecycle. The sections below describe the PPDIOO phases and their relation to network design method and benefits of lifecycle approach to network design. The sections describe subsequent methods in detail. The following explains each PPDIOO phases.
Prepare phase
This involves establishing the business requirements, developing a network plan and proposing a high level conceptual architecture, identifying technologies that may support the architecture.
Plan phase
It involves identifying network requirements that focus on the goal for network, where the network will be installed, who will require which network services and so on. This also involves assessing the sites where network will be installed and any networks existing in the site, and undertakes a gap analysis to determine whether the existing system infrastructure, sites and operational environment may support the suggested system. Plan helps to run the tasks, responsibilities, resources and critical milestones required to implement the alterations to the network. The plan must align with scope, resources and cost parameters established in the original organizational requirements. The output of this phase is set of network necessities.
Design phase
The initial requirements determined in plan phase drive the network design specialists’ activities. The specialists design network in reference to those initial requirements, incorporating any other additional information collected during network analysis and network audit( preferred in the course of upgrading existing network) and through the discussions with network users and managers. The design of network specification produced is a comprehensive detailed design which meets current business and technical needs and incorporates specifications to support reliability, availability, security, performance and scalability. This design specification offers the foundation for implementation activities.
Implement phase
Verification and implementation begins after design has been approved. Network and any other additional components are built in accordance to the design specifications, with the goal of integrating devices with no disruptions to existing network or making points of vulnerability.
Operate phase
This is the final test of design’s appropriateness. It involves maintaining network health through daily operations, that might comprise of reducing expenses and maintaining high availability. The fault detection and correction as well as performance monitoring which takes place in day-to –day operations provide initial information for network lifecycle’s optimization phase.
Optimize phase
This phase is based on proactive network management, its main goal is to identify and resolve issues prior to real problems occurrence and the business is affected. Reactive fault detection and troubleshooting are essential when proactive management cannot predict and mitigate failures in the process of PPDOO.
Benefits of the lifecycle Approach to Network design
Lowering total cost of network ownership through the followings:
Planning for infrastructure alterations and resource requirements
Improving the efficiency of network and of staff supporting
Increasing network availability through:
Specifying correct set of hardware and software releases and keeping them operational and current
Staging and testing proposed system prior to deployment
Proactively monitoring the system and assessing availability alerts and trends
Improving staff skills
Assessing the state of network’s security and its ability to support suggested design
Project simulation
Under different traffic conditions
The standard for wireless local area networks is based on the CA/CMA protocol in supporting asynchronous information transfers CSMA/CA employs an acknowledgement mechanism in verifying successful transmissions and optionally, a handshaking mechanism for decreasing collisions ahead. In both cases an exponential bakeoff mechanism is used. This task examines the theoretical performance of both mechanisms in terms of throughput and delay under traffic conditions which correspond to maximum load that network may support in stable conditions.
WAN performance and Application
WAN performance- it should be more than meeting the need for network speed. The performance and measurement of WAN as well as its network design and capabilities, are being affected through enterprises increase relying on mobile workforces and remote locations in a global marketplace. The need for enhancement in these areas was initially determined by two considerations: the desire to bring supply chain resources closer to customers in the field and an effort to reduce costs through offloading some of the work computing resourced to remote locations.
The bid to save money has become a more urgent during these tough economic times as firms look to enhance their network infrastructures and slash expenses through telecommunicating and extending WAN optimization technologies out to remote divisions.
Innovative ways to optimize WAN performance across conventional and unconventional networks smart network managers are looking at the services and applications used across WAN as well as habits of users on the network prior to making decisions on more software or hardware. Network is becoming more sensitive to keep performance pushed and steadfastness up to speed.
LAN is a communication network that provides users workstations with a transmission medium and a path sharing local and remote computer resources. It consists of network cables known as network media, protocols, and network interface cards, servers, clients and other network devices. Peer-to- peer network is the connection between similar devices for sharing information. It’s suitable in small organization where security is not important. They are unable to handle high volumes of network traffic. The traffic may be directed to both the internal or external servers over and within network. The application services running over this topology may be Emails, TELNET, FTP, HTTP and others. Traffic for a group of users may be specifying while featuring the whole LAN.
