Network Design for ABC Enterprise Branch in Sydney

NETWORKING

Table of Contents
Report..............................................................................................................................................2
Introduction......................................................................................................................................2
Geographical Scope.........................................................................................................................3
Assumptions.................................................................................................................................4
Existing Network.........................................................................................................................5
Logical Design.................................................................................................................................5
Requirements...............................................................................................................................6
Network design scenario..............................................................................................................6
Configurations..............................................................................................................................7
Three-layers hierarchal model.....................................................................................................8
1. Core Layer.........................................................................................................................8
2. Distribution Layer.............................................................................................................8
3. Access Layer.....................................................................................................................8
The IP address and subnet mask......................................................................................................8
Virtual Local Area Network (VLAN).............................................................................................9
Cloud Providers.............................................................................................................................10
1. Google cloud.......................................................................................................................10
2. Microsoft Azure..................................................................................................................11
Service Virtualization technique....................................................................................................11
Dynamic scaling using Cloud computing......................................................................................12
Summary........................................................................................................................................14
Referencess....................................................................................................................................15
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Introduction
In every organization, there is a desire for efficient and effective communication, data transfer
and better resources accessibility. All these desires are made to be true when the network within
the organization is well designed according to the established rules. ABC an enterprise wants to
open a another branch in a newly acquired building at Sydney. This report proposes a network
design for the branch that is located in an 8 floor building. Each floor containing 30 rooms each
with five workstations. Design of the network should be scalable and efficient in order to fulfil
the requirements of the organization. The logical diagrams, IP addressing plans and geographical
scopes of the network are well explained in this report.
Geographical Scope
The proposed network is designed to serve the new branch of ABC enterprise organization at
Sydeney. The building has 8 floors with 30 rooms every on every floor where there will be 5
network points for connecting staff PCs. These floors have different requirements. Every floor
will have the same number of computers and access points for wireless connection apart from the
2nd floor where the server room with a file, print, DHCP and DNS servers together with a
Firewall system providing the edge for the internet and branch offices.
The network designed is expected to achieve some objectives (Montreuil, B. and Poulin *,
2015):
 To provide secure services within the organization and this is done so by isolating it
physically and functionally from being accessed by people who are not employees hence
minimizing cases of unauthorized access.
 To provide a room for future expansion when there is need to scale up the network either
by adding more devices, cables, network peripherals.
 To process information effectively that is the user is able to store, retrieve, or process
data regarding the ABC organization.
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Figure 1.2 Headquarter to old branch and new branch connection
 A point to point leased connection is implemented from the headquarter to the old
branch and new branch which is fiber optics that is very secure.
 Frame relay Connection is used to connect Old Branch and new Branch while the mobile
workers use VPN to access the headquarter network.
Assumptions
Some assumptions are made on the headquarter and branches connection as follows:
1. There will be significant data transfer between the branch offices and the
headquarter all the time,
2. Headquarter is located very close to the branches; thus having leased connection will
cost the organization less.
3. Less data transfer between the branches hence frames relay connection is used.
4. Due to the way, headquarter and the branches are closely situated, 2 interfaces will
be implemented in the gateway router in connection of branches and the
headquarter.
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