Comprehensive IT Network Design for Seraphine Insurance PLC - Report

This report presents a comprehensive IT network design solution for Seraphine Insurance PLC, addressing the company's need for a centralized computer system across its branches. The report analyzes the current business structure to determine performance criteria such as reliability and bandwidth requirements. It explores the technological considerations for connecting different branches to the headquarters, including the use of a Site-to-Site VPN architecture for secure data transmission. The design includes the selection of high-speed links, the creation of a local area network (LAN) and wide area network (WAN), and the selection of appropriate network topologies. The report emphasizes the benefits of centralized network management, scalability, and the importance of estimating network capacity for bandwidth allocation. It details the network devices and operations, including the use of the OSI model for secure communication and VPNs for cost-effective and secure remote site communication. The report also includes a network design scenario for the headquarters, testing and evaluation plan, and an investigation into the network's ability to grow. The report concludes with a bibliography of relevant sources.

IT Network Designing
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Author’s Note

Introduction
• For the development of the network solution for Seraphine Insurance
PLC the interaction between the different telecommunication
network, computers and the other devices connected in the network
is analysed for the development of the centralized computer system.
The effectiveness of the network is achieved after a detailed analysis
of the current business structure of the organization. There are
different performance criteria such as reliability and bandwidth that is
needed to be measured for the development of the network.

Distributed computing and active
Networks
• After a considerable progress on the implementation and design the
technological consideration that needed for the configuration of the
network is analysed. The technology that is needed to be used for
connecting the different branches with the headquarter of the
network is identified with considering the security issues for
transmission of data. A site to Site VPN architecture is selected for the
configuration of the network.

Selection of the Link
• A high speed link between the head quarter and the remote branches
should be used for enabling communication between the branches.
The availability of high performance network improves the
performance reduces the waiting time of the user to reach the
destination address.

Infrastructure and experimental
results
• For the development of the network an analysis is made on the
current framework of the organization and the number of branches
that are needed to be connected with the head quarter of the
company and a local area network is created for the company. The
local area network are connected with each other to form a wide area
network and the devices needed for connecting the device.

Benefits and constraints for the
network
• It is important to select an appropriate network topology depending
on the needs of the organization and develop an appropriate network
structure for connecting the different branches with each other. The
router is needed to be configured with access control list for
preventing the access of the unauthorised users to connect with the
servers containing sensitive organizational information. The benefits
and risk of selection of the topology is needed to be analysed for its
implementation in the current network and development of the
physical and logical network framework. The LAN is used for
interconnecting the network device of the branches and enabling
short distance communication in the building.

Impact of the topology
• The selection of the centralized management of the network also
helps in reducing the errors and increases the reliability of the
network. It helps in enforcing a control on the network and eliminates
the extra cost that is needed for deployment of duplicate device in
each of the sites for management of the service. The network can be
upgraded by upgrading the centralized server and the devices and
there in no need to replace all the old system installed in the local
sites. The scalability of the network can be improved and new sites
can be added or removed according to the requirement of the
organization for the management of the network framework.

Communication and
requirement of bandwidth
• The network capacity is needed to be estimated for the allocation of
sufficient bandwidth and distribution of the channel for increasing the
rate of transfer of data. The rate of data transfer is dependent on the
available bandwidth and reducing the latency for eliminating the lags
in the network. The lags in the network is needed to be identified for
increasing the network efficiency and management of the
communication service needed by the organization for running their
business efficiently.

Network device and operations
• For interconnecting the different offices and their branches with the
Seraphine headquarter different types of network device and technology is
needed that should be connected with the means of different cabling option
for successfully transmit the data from the source to the destination address
in the network. The different layers of the OSI model is utilized for
establishment of secure communication between the source and the
destination address. The end device is connected with the switch for
enabling communication between the sender and receiver in the network.
The selection of the VPN for communicating with the remote site helps in
reducing the cost of communication and maintenance. The data can be send
securely via the encrypted channels and reduces the risk of man in the
middle attack and improves the security of the network.

Network Design Scenario for the
headquarter

Wide Area Network Design

Testing and evaluation of the
designThe test plan should consists of the following sections;
• Defining the objectives of the network – The network should be scalable and the transmission
speed should not be less than the minimum speed requirement of the application and services that
are used by the users. T
• Acceptance Criteria –A risk response plan should be created that would help in taking immediate
action in case of failure of any network device and recover the network.
• Development of schedule – A high level activity should be defined and included in the network
documentation for estimating the time needed for the configuration of the network device.
• Defining roles and responsibility – The network development team should be assigned with
different roles and responsibility for minimizing the errors in configuration of the network.
• Identification of resources – The stages of the network development should be managed for the
identification of the resources needed for the deployment of the network. The network
deployment plan should be created containing the resources and the equipment.
• Procedures – Test cases should be developed along with the test script for performing test on then
network and verification of the connectivity between the different devices installed in the network.