Network Infrastructure Design Case Study: C02555 Assignment 1

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C02555
Case study Assignment
Assignment 1
Network Infrastructure Design
Student Name:
Student ID:
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Contents
Introduction....................................................................................................................................................2
Designing the Network Infrastructure...........................................................................................................3
Recommendation.........................................................................................................................................16
Conclusion...................................................................................................................................................17
References....................................................................................................................................................18
List of Figures
Figure 1: Network Design..............................................................................................................................6
Figure 2: Network Designed on Packet Tracer..............................................................................................8
Figure 3: DNS Configuration.........................................................................................................................9
Figure 4: DHCP Configuration....................................................................................................................10
Figure 5: Web Server...................................................................................................................................11
Figure 6: FTP Configuration........................................................................................................................12
Figure 7: DHCP Successful.........................................................................................................................13
Figure 8: Web Server Successful.................................................................................................................14
Figure 9: FTP Successful.............................................................................................................................15
Figure 10: Communicating Successfully.....................................................................................................16
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Introduction
As a part of networking, there are many devices which are used to build a small network. We are going to
discuss these following devices with there roles as well as functionality. As per the case study, we will
look for the requirements of the organization and then will take help of draw.io to design the network for
the given organization. We will also talk about the issue which the organization is going through and also
find out the reason behind that problems. Finally, we will use packet tracer for implementation of the
network with the proper configuration of each of the connected devices and also give some of the
recommendations for the implemented network.
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Designing the Network Infrastructure
We are going to define the devices which are basically used in the network. We will discuss the functions
of those devices connected. Some of the devices which we are going to discuss upon:
1. Router: It is a device which is used in networking for forwarding or sending the data over the
network. It is also used for separating different network. It is also helpful in selecting the best
path for the destination packets. It is also used to route the packets in the network.
Functions:
 Selecting the best path.
 Route the packets.
 It creates a routing table.
 The local network is segmented by the router (Fisher 2018).
2. Switch: It is a device which is used for receiving the data packets from the sender and sends it to
its proper receiver. It has a collision domain on its every interface or port. It stores a MAC table
to store the addresses of the devices. The first thing a newly switch does is it first broadcast the
packet to each of the connected devices in the network so that it can store the address of the
connected devices in its mac table.
Functions:
 Forwarding the frames including the MAC address.
 Prevent the collision.
 Multiple hosts get connected using the switch.
 VLAN configuration on the switch (Rouse 2018).
3. Access Point: In networking, Access Devices are the type of devices which are used to connect
wireless devices into the network. There are certain access points available which have the
functionality of a built-in router. These devices do not require to get connect to the router. It is
very cost efficient for a small network organization having less budget. As there is no
requirement of the wire to connect to the network. The wireless devices are easily got connected
to this access point to be a part of the network.
Functionality:
 It supports wireless interface of LAN.
 Wireline card is available for connecting the available backbone network.
 It also filters the traffic of the sub-network.
According to the given case study, we have figure out the requirement of the organization which will
further help us in building and implementing the network for the future use after the increment of the
students and the staff in the network. After analyzing the existing network infrastructure and the
configuration, the problems which are there in the network and their probable causes are shown in the
below table:
Issue Probable Cause
1. Broadcast traffic was coming in large
amount.
 The network is consisting of two hubs of
24 port which is used to send the
broadcast every time if a user wants to
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communicate with each other.
 Hub does not have a mac table that stores
the address of the devices connected to it.
2. Slow in the response timing.  Hub is only the reason for slow in the
response time as hub have a single
collision domain it means that if more
then one user will send the request then it
will collide and result in slow in the
response timing.
 The switch has collision domain for each
of the port available in the device (Hope
2017).
3. Managing and maintaining all the
connected devices are getting difficult.
 As all the connected devices are holding
the static IP addresses. Going to each of
the connected devices and giving the
addresses manually is a tough task to
perform. The static IP can be changed by
any of the users who want to change his
address of their device.
 The network is also very complex to
manage. There are unnecessary devices
connected in the existing network.
 All the systems connected have a
different operating system running.
4. The access of the network is limited for
the portable systems and the IoT.
 The reason behind this issue may be the
limited port in the given two hubs.
 The reasons can be the security policy
which has been set by the administrator
for giving limited access.
5. Security issue in the network.  Router security has not been
implemented.
 Console port security.
 Security on the switch.
 Access list.
From the given case study, we get to know the total number of the host as well as the network address
which is needed to be taken while implementing the new network. The basic requirement of the
organization has also been given in the case studies. For implementing the network, the knowledge which
we need to focus upon are:
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Total number of students: 45
Total number of staffs: 20
Server required: DHCP server, DNS server, File Server, Print Server, Web Server, and SQL Server.
Laser Printer: 4
Photocopier: 1
Access Point: 2
Now we will design the network using the requirement of the organization. The design will follow as
follow:
Figure 1: Network Design
The design of the network consists of a multi-port switch and 2 48-port switches and a 24-port switch. We
have attached six servers for different services. The services include DNS, DHCP, Web, File Server,
Print Server, and SQL Server.
There are total 45 students who are needed to be connected so we have taken one 48 port switch where
one of the ports will be connected to the multi-port switch and one port will be connected to the printer.
And the next switch we have used which is 24 port switch which will be used to connect the upcoming
students in the future. For 20 Staff of the organization we have taken a 48-port switch where 20 staff will
be connected to it and the rest two port will be used for printer and copier. The upcoming staff will be
connected to the network using this 48-port switch itself.
The required devices which will be used to connect in the network are as follow:
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Devices Series Port Amount
1. Router 2800 4 1
2. Multi-port Switch 3500 24 1
3. Switch 2900 48 2
4. Switch 2900 24 1
5. Printer 1100 1 3
6. Computers 5500 1 65
7. Copier 3000 1 1
From the above table, it will be easy to implement the network as the number of hosts has been defined
and the other networking devices have also been given. The number of switches and multi-port switch
and also the number of computers, printers, the copier has been defined in the above table. The first thing
was to figure out the basic requirement of the organization and after the above table, we have figured the
number of devices in the network.
Now we need to create a table which will show the network range. It will also provide the IPI address of
each connected devices in detail.
Device IP Address Subnet Mask
1. Router 10.0.0.1 255.0.0.0
2. DNS Server 10.0.0.2 255.0.0.0
3. DHCP 10.0.0.3 255.0.0.0
4. Web Server 10.0.0.4 255.0.0.0
5. File Server 10.0.0.5 255.0.0.0
6. SQL Server 10.0.0.6 255.0.0.0
7. Print Server 10.0.0.7 255.0.0.0
8. Staff 10.0.0.8-10.0.0.27 255.0.0.0
9. Staff Printer 10.0.0.28 255.0.0.0
10. Staff Copier 10.0.0.29 255.0.0.0
11. Student 10.0.0.30-10.0.0.74 255.0.0.0
12. Student printer 10.0.0.75-10.0.0.76 255.0.0.0
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The network address which we have taken use of is of Class A network. The network is 10.0.0.0. We
have given the address to the router is 10.0.0.1 with the subnet mask of 255.0.0.0
Now we will implement the network on packet tracer with proper configuration of each of the connected
devices. With the help of the above tables which are the IP address table and the required devices table,
we will implement the network.
Figure 2: Network Designed on Packet Tracer
In the above figure, we can see that there are six servers connected to the multi-port switch. And all the
systems that are required for the organization has also been connected to the network. There is 20 staff
which has been connected to the switch with the printer and the copier. The rest computers which are of
students are connected to the separate switch. An Access Point has also been set in the network through
which all the wireless connection will be done. The configuration for each of the services which have
been configured as shown below:
1.DNS Server: We have configured DNS on the server. The configuration includes the following steps.
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Figure 3: DNS Configuration
DNS issued for merging the IP address with the domain name. Which means that we can write either the
IP address or we can make use of the domain name which has been assigned for that IP address. The
name is easy to remember for a human and the IP addresses are for the devices. We need to enable the
services on the server for accessing the service of DNS (Shaw 2018).
2. DHCP: The configuration is done on the server. We can configure DHCP on the router as well as the
server. As per the requirement, we have configured DHCP on the server. The configuration is shown
below:
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Figure 4: DHCP Configuration
We have created a pool naming serverPool1. Then we have assigned the starting IP address as well as the
maximum number of users who will be assigned the address automatically. Then we will add the
configuration. DHCP has been configured so that the users will be able to get the address assigned to
them automatically and there will be no need for the network administrator to go to each of the connected
devices manually and give the static address to each of the devices (techterms 2014).
3. Web Server: Web server has been configured so that the user of the network will be able to access the
web services inside the network. The configuration which has been done on the server has been shown
below:
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Figure 5: Web Server
We have to enable the HTTP services from the services in the server. One can edit the web page as per
their requirement. The edited web page then will be shown on the display while accessing the web
services.
4. File Server: We will configure FTP on the server which will be used for saving the configuration file on
a centralized location. It works as a backup file where we will get the of the saved files. The configuration
has been shown below:
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Figure 6: FTP Configuration
The configuration needs a username and a password to be set so that while accessing the FTP server there
must need to insert the credential for accessing it. As we have set the username as Admin and the
password as Admin (brighthub 2016).
Now the task is to check the connectivity of the connected devices and the services. We will check each
of the services has been enabling and getting accessed by the connected computers. First of all, we will
check the DHCP services on the computers.
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