Existing Network Analysis

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Existing network analysis in an important step when designing a new network as it establishes relevant information about the current network infrastructure and its bottlenecks. It is also a tool that helps to establish the needs and requirements of the company. Requirements of the networks in terms of the application and services are what drive the design of the network. This chapter reports on the outcome of the network analysis, giving details on the existing network design, hardware, protocols and identified bottlenecks in the design and finally offer recommendations that will be the basis of the new design. 4.1 OVERVIEW OF THE EXISTING NETWORK The existing network design is flat network that has evolved over period of time to meet the growing requirements, because of the design approach all the workstations are in one broadcast domain. The existing network has many problems; these problems are related to the network design, since all workstations are in the same broadcast domain, therefore when all the workstation communicates within the same domain, the network will be congested. Furthermore, the interconnection media is not enough to support high bandwidth usage, as there is only one uplink cable interconnecting the devices. MaltHouse engineering has a network of approximately 60 systems including servers, workstations, IP phones and printers. The size of the company’s network infrastructure can be classified as a small to medium-sized network. The network devices are segmented into three physical local area networks (LAN) within the same company, these LANs where created as part of application and services requirements, the LAN can be classified as general data network, accounting network, the IP telephoning (VOIP) ... ... middle of paper ... ...s that where to be preformed on the network. The logical network topology is represented in figure 4.1. There are three different physical networks, all existing in the same building and crossing paths but not communicating to each other. The main focus was on the general data network which is represented by the red lines in figure 4.1. The main focus was placed on the general data network. It can be noted that all the switches are connected to each other forming a flat network. There are a total of five switches, each switch placed in a separate location on the building. From figure 4.1, it can also be noted a dotted line exists between the switches; this dotted line represents an uplink cable that is not connected permanently. The reason for not connecting the cable is due to the choice that was utilised to establish internet connection between the devices.
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