ICT106 Data Communications and Networks Report for XYZ Company - KOI

This report, prepared for XYZ Company, addresses the allocation of public IP addresses across its Sydney, Melbourne, and Adelaide offices. It details a three-layer hierarchical network topology designed for scalability, reliability, and availability, incorporating principles of hierarchy, modularity, resiliency, and flexibility. The report includes a comprehensive LAN design, an IP addressing plan using the 17.5.6.0/23 unreserved public IP address, and a subnetting scheme for each office location. It also lists the hardware devices, such as Cisco routers and switches, and specifies the cabling plan using fiber optic and Cat 6 cables. The report concludes with a discussion of the network's development based on XYZ Company's requirements, subnet plans, and wireless access needs, aligning topology and protocols for optimal network framework and hardware estimations.

Running head: ICT106 DATA COMMUNICATIONS AND NETWORKS
ICT106 Data Communications and Networks
Assessment 3
Name of the Student
Name of the University
Author’s Note

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ICT106 DATA COMMUNICATIONS AND NETWORKS
Table of Contents
1. Introduction..................................................................................................................................2
2. Local Area Network....................................................................................................................2
3. Hardware......................................................................................................................................5
4. Conclusion...................................................................................................................................6
Bibliography....................................................................................................................................7

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ICT106 DATA COMMUNICATIONS AND NETWORKS
1. Introduction
The report is prepared for XYZ Company located in Sydney for the allocation of public
IP address in three different location of the office in Sydney, Melbourne and Adelaide. The
company have its main office in Sydney and the other two remote office in Melbourne and
Adelaide. The main aim of the report is allocation of unreserved public IPv4 address to the
offices located in different geographical location. A design and description of the local area
network for the office is given in the report and a discussion is made on the LAN topology for
the selection of the particular topology. An IP addressing plan is prepared for the company for
configuring the network device and hardware device that are needed for the development of the
network are listed in the report.
2. Local Area Network
Network Topology
The network is developed following the three layer hierarchical design topology such that
the scalability, reliability and availability of the network can be improved. This type of topology
finds its application for small, medium and large scale enterprise network and the designed can
be tailored based on the change in needs of the organization. For a small network as for the
branch office less number of distribution level devices are needed and it can be increased with
the increase in number of users in the branch (Cunha et al. 2016). The core device is needed to
be configured with VTP protocol such that it can share the VLAN information with the
connected client devices and reduces the complexity if any change is needed to be made in the
network. The following principles defines the success of the network:

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ICT106 DATA COMMUNICATIONS AND NETWORKS
Hierarchy – The network framework is designed such that the reliability is maintained for
transmitting the data packets over the network. Smaller manageable areas are composed to
develop the complex design.
Modularity – The network functionality can be separated by dividing the network into
multiple manageable modules such that the simplicity is maintained for the design. Multiple
blocks of service, data center and edge are available and it can be added by configuring the
hardware device such that the flexibility is improved.
Resiliency – The uptime of the network is high under normal or high traffic flow in the
network and in case of any failure of software and denial of service attacks the network is needed
to be available for normal use (Dike, Obiora and Eze 2016). The resiliency is maintained with
the use of redundant link such that the data traffic can flow using multiple communication
channels.
Flexibility – New services can be added easily and different areas of the network can be
modified without adding extra cost or making major network upgrades.
Spanning tree protocol is used for the configuration of the network switch and loops are
formed using multiple interfaces to reach the destination address. The layer 3 switch is
configured with VLAN based on the number of department in each of the branch or head office.
The layer 2 device connected with the layer 3 switch is configured as client for automatically
getting the VLAN information and allow access of the subnet for that department (Bae, Kim and
Kim 2016).

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ICT106 DATA COMMUNICATIONS AND NETWORKS
LAN Design
The LAN is designed such that the computer and the servers are kept in different subnet
such that user access management can be done and the network is secured. For each of the
location different routers are used and similar topology is followed each of the office for
decreasing the complexity of the network design.
IP addresses
For the development of the IP addressing plan 17.5.6.0/23 unreserved public IP address is
selected for enabling communication between the network devices. It has a global scope and may
be uniform or non-uniform in manner. It is used for getting internet service and the ISP has the
control over the address.
Subnet
Name
Neede
d Size
Allocate
d Size
Address Mas
k
Dec Mask Assignabl
e Range
Broadcas
t
Subnet A 63 126 17.5.6.0 /25 255.255.255.12 17.5.6.1 - 17.5.6.12

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ICT106 DATA COMMUNICATIONS AND NETWORKS
Sydney 8 17.5.6.126 7
Subnet B
Melbourn
e
53 62 17.5.6.12
8
/26 255.255.255.19
2
17.5.6.129
-
17.5.6.190
17.5.6.19
1
Subnet C
Adelaide
43 62 17.5.6.19
2
/26 255.255.255.19
2
17.5.6.193
-
17.5.6.254
17.5.6.25
5
Subnet D 2 2 17.5.7.0 /30 255.255.255.25
2
17.5.7.1 -
17.5.7.2
17.5.7.3
3. Hardware
Device Name Features and Ports Cost
Cisco 2811 Series integrated
service router
Embedded Ga or Fa port,
AUX and Console Port
US$2,495.00
Cisco Catalyst WS-C2950S 24 Fast Ethernet ports
VLAN Support
US$949.99
Cisco WS-C3524-XL-EN
3500
24 Fast Ethernet port
2 Gigabit Ethernet port
VLAN Support
US$2995.0

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ICT106 DATA COMMUNICATIONS AND NETWORKS
For interconnecting the network device a cabling plan is needed to be followed. Fiber
optics cables are used for connecting each of the branch office with the head office routers since
a long distance communication is needed. The fiber optics cables are highly efficient since it can
provide high speed data connection between the different locations. The local area network
connection is made with the help of cat 6 cable since it has the support of power over Ethernet
and support gigabyte Ethernet (Usman et al. 2018). For using it in the gigabyte environment the
length of the cable is needed to be restricted to 55 meter. The cable can be used in the form of
straight through and cross over cables by altering the pin connectors.
4. Conclusion
The network is developed following a requirement analysis of XYZ company and a subnet plan
is created that can help in increasing the efficiency of usability of the IP address. A design of the
LAN is created after analyzing the number of hosts that are needed to be connected per subnet.
The application usage and the inter department data transfer needs is also analyzed for creating
the network. The wireless access that is needed to be maintained for the user and the
communication needs is analyzed for developing the network. The network topology and
protocols that would be best for the network is aligned with the system for creating the network
framework. An estimation is made for analyzing the hardware that are needed for the expansion
of network and the types of network cables that are needed for connecting the network devices
installed in different location of the network.

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ICT106 DATA COMMUNICATIONS AND NETWORKS
Bibliography
Ali, I., Hussain, S.S., Tak, A. and Ustun, T.S., 2017. Communication modeling for differential
protection in IEC-61850-based substations. IEEE Transactions on Industry Applications, 54(1),
pp.135-142.
Bae, M., Kim, K. and Kim, H., 2016. Preserving privacy and efficiency in data communication
and aggregation for AMI network. Journal of Network and Computer Applications, 59, pp.333-
344.
Cunha, F., Villas, L., Boukerche, A., Maia, G., Viana, A., Mini, R.A. and Loureiro, A.A., 2016.
Data communication in VANETs: Protocols, applications and challenges. Ad Hoc Networks, 44,
pp.90-103.
Dike, D.O., Obiora, V. and Eze, C., 2016. Improving congestion control in data communication
network using queuing theory model. IOSR Journal of Electrical and Electronics
Engineering, 11(2), pp.49-53.
Ito, K., Hashimoto, K. and Shibata, Y., 2017, November. V2X communication system for
sharing road alert information using cognitive network. In 2017 IEEE 8th International
Conference on Awareness Science and Technology (iCAST) (pp. 533-538). IEEE.
Li, J., Peng, Z., Gao, S., Xiao, B. and Chan, H., 2017. Smartphone-assisted energy efficient data
communication for wearable devices. Computer Communications, 105, pp.33-43.
Liu, Y., Liu, A., Li, Y., Li, Z., Choi, Y.J., Sekiya, H. and Li, J., 2017. APMD: A fast data
transmission protocol with reliability guarantee for pervasive sensing data
communication. Pervasive and Mobile Computing, 41, pp.413-435.

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ICT106 DATA COMMUNICATIONS AND NETWORKS
Marques, B., Machado, I., Sena, A. and Castro, M.C., 2017, October. A communication protocol
for fog computing based on network coding applied to wireless sensors. In 2017 International
Symposium on Computer Architecture and High Performance Computing Workshops (SBAC-
PADW) (pp. 109-114). IEEE.
Usman, M., Jan, M.A., He, X. and Nanda, P., 2018. QASEC: A secured data communication
scheme for mobile Ad-hoc networks. Future Generation Computer Systems.