Data Communication and Network

This document discusses the design and implementation of a local area network (LAN) for a company, including IP addressing, protocols, and hardware.

Running head: DATA COMMUNICATIONS AND NETWORKS
Data Communication and Network
Name of the Student
Name of the University
Author Note

1DATA COMMUNICATION AND NETWORK
Table of Contents
1. Introduction:...............................................................................................................2
2. Local Area Network:..................................................................................................2
2.1 LAN Design of the interconnected devices and the workstations:......................2
2.2 Protocols and LAN Topology:.............................................................................4
3. Hardware:...................................................................................................................5
4. Conclusion:................................................................................................................6
References:.....................................................................................................................8

2DATA COMMUNICATION AND NETWORK
1. Introduction:
In the current context, the Top Network Company has an office in the CBD of
Sydney, and this office is three storied building. The organization also has a total 3
department which is allocated in each of the floors of the building. In the building, there are
total 84 workstations which are connected to the administration department of the
organisation. Also, 170 workstations are on the marketing floor and on the sales floor there is
a total of 255 of workstations. For the local area connection, an IP addressing plan has been
designed meeting the requirements of the organisation. All the users of different department
able to access the WEB and also can access the email servers we within the DMZ network
zone. In this context, user centred design principals have been followed to develop the design
of the network.
2. Local Area Network:
2.1 LAN Design of the interconnected devices and the workstations:

3DATA COMMUNICATION AND NETWORK
From the above network diagram, it has been shown that the each of the floors of the
organization is using a separate switch and this separate switches are connected to a central
switch which is very much important for the configuration of the VLAN and the VTP server
for each of the department of the organization. Thus the above network is satisfying the
network requirement of the Top Network Company. In this network design, the switch
configuration with the server helps to transmit the VLAN information to the connected layer
2 switches. In this case, the IP address is subnetted in a total number of three subnets that
each of the department will be able to gain different IP address range. Also, the router must
be configured in such a way that it assigns IP addresses to all VLAN automatically and for
that routers can be configured with DHCP pool. Also, for a stable network connection, it is
very much important to eliminate the packet loss risk, congestion and jitter within the
network and also the network uptime also need to be increased. To achieve this redundant
links need to be used for the network device interconnectivity.
IP Addressing Scheme
Major Network: 172.168.8.0/22
Available IP addresses in major network: 1022
Number of IP addresses needed: 576
Available IP addresses in allocated subnets: 890
About 88% of available major network address space is used
About 65% of subnetted network address space is used
Subnet
Name
Need
ed
Alloca
ted
Address Ma
sk
Dec Mask Assignable
Range
Broadcast

4DATA COMMUNICATION AND NETWORK
Size Size
Administra
tion
96 126 172.168.
11.0
/25 255.255.255
.128
172.168.11
.1 -
172.168.11
.126
172.168.11
.127
Marketing 192 254 172.168.
10.0
/24 255.255.255
.0
172.168.10
.1 -
172.168.10
.254
172.168.10
.255
Sales 288 510 172.168.
8.0
/23 255.255.254
.0
172.168.8.
1 -
172.168.9.
254
172.168.9.
255
2.2 Protocols and LAN Topology:
There are various protocols that work in the within the OSI models in different types
of layers (Zhao et al., 2018). In this context, the LAN specifications are very much important
in the case of implementation of the protocols of networking and configuration of the
network according to the organizational needs. These protocols are needed in the sense of
formal policy and the standard comprising procedures creation. Also, this is used for creating
the rules and formats for addressing the communication process between the connected
network devices in the LAN. End to end process is governed by this protocols which secure
and manages the process of data communication. In the designed network the email servers
must be configured with the protocol of the SMTP and WEB servers must be configured with

5DATA COMMUNICATION AND NETWORK
the protocol of HTTPS which ensures secure transmission of the information among three
departments of the organization. There can be errors in the network configuration in different
situations, and these errors must be troubleshot properly. For troubleshooting SNMP and the
ICMP protocols can be used.
In this context, the LAN is required by the organization to connect each of the
workstations of the organization mainly for communication purposes. This workstation
includes printers, server and computer devices for exchanging information and files between
the departments. In this case, a hierarchal network configuration has been followed to
develop the LAN connection. This network design tool is very much important for network
infrastructure development. This network is developed following the application of the
resiliency, flexibility and the modularity so that unexpected situations within the network can
be managed.
3. Hardware:
Component Ports and Features Justification
Integrated service router of
Cisco 2811 Series
Console Port, AUX port and
the Fa or the embedded Ga
port
This router has been selected
in the sense that it provides
support for the voice and
security services for the
medium and small
organizations (Kalyan &
Prasad, 2012). The density
of this router can be
increased with additional
high-speed card slots of

6DATA COMMUNICATION AND NETWORK
WAN interface.
Cisco Catalyst WS-C2950S VLAN support and 24 Fa
ports
This component is selected
as this provides VLAN
configuration for the small
and the medium size
organizations for selecting
the protocols with right
combinations. It also
provides the voice and data
services with additional
security filtering to improve
the network efficiency.
Cisco WS-C3550-XL-EN
3500
VLAN support, 2 Ga port
support and 24 Fa port
support
Through this component,
network availability can be
increased, and the service
quality can be enhanced for
performing different types
of network operations.
4. Conclusion:
From the above discussion, it has been assessed that the network solution that has
been created for the Top Network Company is meeting the required criteria of the
organization. The LAN connection for the organization has been developed for the
organization after detail evaluation of each of the floors of the organization. In the overall
evaluation process, the requirement of the users of this network has also been analysed. From

7DATA COMMUNICATION AND NETWORK
the analysis, various network devices have been identified that can fulfil the needs of the
network users. Separate application servers are used by each of the department of the
organisation for managing the data and to improve the communication efficiency. All the
workstations of the organisation used a working internet connection, and due to this, the local
area connection has been developed in such a way that it can meet the requirements of the
organisation. IP addressing scheme has been used in this case for connecting the workstation
with each of the subnets of the organizations. Hardware is a very much essential part for
network development, thus in this discussion, important hardware has been identified, and
justification for choosing those hardware has been given.

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References:
Kalyan, G. S., & Prasad, D. V. V. (2012, April). Optimal selection of Dynamic Routing
Protocol with real time case studies. In Recent Advances in Computing and Software
Systems (RACSS), 2012 International Conference on (pp. 219-223). IEEE.
Zhao, J., Bai, J., Zhang, Q., Yang, F., Li, Z., Zhang, X., ... & Bai, R. (2018, December). The
Discussion about Mechanism of Data Transmission in the OSI Model. In 2018
International Conference on Transportation & Logistics, Information &
Communication, Smart City (TLICSC 2018). Atlantis Press.