Report on Information System Network Essentials at ADC Company

This report provides a comprehensive analysis of the network infrastructure for the Advanced Digital Computers (ADC) Company, an Australian-based computer and network item seller with multiple branches. The report details the network assumptions made during the planning phase, the proposed network requirements, and the media selected for network connections, including copper and fiber optic cables. It outlines the ADC network address scheme, including IPv4 and IPv6 address plans, subnet calculations, and the assignment of unique IP addresses to each branch. The report also covers the selection of network hardware, such as routers and switches, and describes the network topologies for each branch, including star and hybrid topologies. Furthermore, it discusses the internet access mode, specifying the use of fiber-optic cables. The report concludes with a summary of the key findings and provides references for further information.

Information System Network Essentials in the Advanced Digital Computers Company 1
INFORMATION SYSTEM NETWORK ESSENTIALS IN THE ADVANCED DIGITAL
COMPUTERS COMPANY
By (Student’s names)
[Class/Course Name]
[Lecture/Professors’ Name]
[University Name]
[City/town where the university is located]
[Date]

Information System Network Essentials in the Advanced Digital Computers Company 2
Table of Contents
Table of Contents........................................................................................................................................2
1 Executive summary.............................................................................................................................3
2 Introduction.........................................................................................................................................3
2.1 Network assumptions made........................................................................................................3
2.2 The Proposed Network requirements...........................................................................................4
2.3 The Media for network connection..............................................................................................4
2.4 ADC Network address scheme Plan.............................................................................................5
2.4.1 Calculating the subnets IP addresses...................................................................................5
2.4.2 ADC IPv4 Address Schemes..................................................................................................9
2.4.3 ADC-IPv6 Address scheme Plan.........................................................................................10
2.5 ADC-Network hardware Selections............................................................................................11
2.6 ADC Network Branches topologies............................................................................................12
2.6.1 Head office branch topologies (Star-Hybrid Topologies)..................................................13
2.6.2 Chatswood branch topology (Star-Topology)....................................................................13
2.6.3 Leichhart branch topology (Star Topology).......................................................................14
2.6.4 Rockdale branch topology (Star Topology).......................................................................14
2.6.5 Bankstown H.O branch topology (Star Topology).............................................................15
2.6.6 Epping H.O branch topology (Star Topology)...................................................................15
2.6.7 Server Network branch topology (Star Topology).............................................................16
2.7 ADC Internet Access mode.......................................................................................................16
2.7.1 Fiber-optic cables internet access mode.............................................................................16
3 Conclusions.......................................................................................................................................16
4 Reference...........................................................................................................................................17

Information System Network Essentials in the Advanced Digital Computers Company 3
1 Executive summary
The ADC is a computer selling company that is located in Australia country and it has grown
over the years where it had opened six branches in major towns and the head office branch. The
company management had decided to come up with a network infrastructure that will connect all
the branches subnets and allow better communication and internet connectivity.
This report covers in details the network subnets and their IP addresses, the network branches
topologies, the types of hardware to be used and the mode of internet access in the company’s
network.
Keywords: Subnet, Switch, Router, Server, IP address
2 Introduction
The Advanced Digital Computer Company is an Australian based company that works as dealer
and sellers of the computer and network items, currently the company had expanded to various
branches that are situated in different towns.
The company is intending to install a network that will cover all its branches in the country and it
had purchased the ipv4 and ipv6 IP addresses as 172.16.16.0/20 and 2001::acad::Bead::/60 in a
respective manner ,using the above IP addresses the subnet will be assigned a unique IP address
using the IP address scheme for both ipv4 and ipv6 IP address spaces and this will allow the
100% future expansion as the company anticipate to grow.
2.1 Network assumptions made
In the preparation to install the network and gather the requirements below are some of the
assumptions that were made.
i. The company will have access to the internet services in all branches.
ii. There will be seven LANs network subnets that will be inter-linked together.
iii. Each network will be having printing devices according to number of computers at a
rate of one printer for every seventy computers.
iv. The various branches and LANs subnets will be allocated different IP address.
v. There will be six subnets for the all six network branch locations.

Information System Network Essentials in the Advanced Digital Computers Company 4
vi. For every subnet there will be many switches and one router according to hosts
number.
vii. Every computer will be only assigned to one staff member.
viii. There will be use of copper cable for the local connections in the subnets.
ix. For the interconnection between the subnets and head-office the fiber optic cables
will be used (Behrouz 2016).
x. The company’s internet services providers will use fiber cables to supply internet to
the company.
2.2 The Proposed Network requirements
The advanced digital company network has various requirements to be meeting as the proposed
network will be installed which are as follows:
i. Network to support 99% uptime every day.
ii. Network bandwidth to be more than 550MHZs.
iii. Network to have internet connectivity for every subnet.
iv. Network to support 340mbps or more download speed.
v. Network to support 250mbps or more upload speed.
vi. Network to support the printing of documents over the network printers.
vii. Network to support 550mbps or more data transmission rates.
viii. Network to support files sharing and backup.
2.3 The Media for network connection
In the network there will be various connection media that will be used to connect the switches,
routers, printers, servers and the computers which will include the copper cables and the fiber
cables as summarized in table below indicating their prices for budget preparations (Douglas
2017).
Media type Bandwidths Rate of
transmitting
data
Cost each
Meter
Selection Justifications
Copper- 350MHz per 50-100M 1000-mbps AUD$0.5 It is used to connect the subnets computers,

Information System Network Essentials in the Advanced Digital Computers Company 5
CAT5 per 50-100M printers and servers to the access layer
switches this media is used due to its low
cost, simplicity in installation and easy
configuration in the network.
Copper-
CAT6
750MHz per 100M 1-10gbps per
100M
AUD$0.7 It is selected to be used for its suitability to
connect the distribution layer switches and
the subnet routers however it is selected
since it is not expensive to buy, it can be
installed and configured between devices
with ease, it supports a high data
transmission rate of 10gbs and it is able to
transmit data for about 100 meters without
being attenuated.
Fiber-optical
-cable
20Ghzs per 3kM 10gbps per
5KMs
AUD$6.1 It was selected for its suitability to transmit
data for long distances therefore this media I
used to connect the subnets and the main
head office ,this media selection was
attributed to the high data transmission rate
of 10 gbps or higher, offering best uptime,
and ability to transfer data over 5 kilometers
per second.
2.4 ADC Network address scheme Plan
2.4.1 Calculating the subnets IP addresses
The company had purchased the IP address space 172.16.16.0/20 from the internet services
providers that will form all the seven subnets of the company network as calculated below
(Forouzan 2014).

Information System Network Essentials in the Advanced Digital Computers Company 6
2.4.1.1 Head offices branch subnet
In head office a total of three branches are connected where after 100% growth sales subnets will
have 120 computers and 2printer, marketing will have 70 computers and 1 printer and the
accounts will have 60 computers and 1 printer which in total will add up to 254 hosts.
i. Head office –Sales department
Hosts No = 122
2y = [122 + 2].
29 = (512> 124)
Networks’ bits = 32 – 9 = 23
Networks’ IP Address = 172.16.18.0/23
Broadcasts IP Address: - 172.16.18.255
Subnets mask =255.255.240.0
Ipv6-mask =128-9=119
ii. Head office-marketing department
Hosts No = 71
2y = [71 + 2].
27 = (128> 73)
Networks’ bits = 32 – 7 = 25
Networks’ IP Address = 172.16.17.0/25
Broadcasts IP Address: - 172.16.17.255
Subnets mask =255.255.240.0
Ipv6-mask =128-7=121
iii. Head office-accounts department
Hosts No = 61
2y = [61 + 2].
26 = (64> 63)
Networks’ bits = 32 – 6 = 26
Networks’ IP Address = 172.16.18.0/26
Broadcasts IP Address: - 172.16.18.255

Information System Network Essentials in the Advanced Digital Computers Company 7
Subnets mask =255.255.240.0
Ipv6-mask =128-6=122
2.4.1.2 Chatswood branch subnet
The branch has 104 computers and 2 printers and therefore.
Hosts No = 106
2y = [106 + 2].
27 = (128> 108)
Networks’ Bits = 32 – 12 = 25
Networks’ IP Address = 172.16.19.0/25
Broadcasts IP Address: - 172.16.19.255
Subnets Mask =255.255.240.0
Ipv6-Mask =128-7=121
2.4.1.3 Leichhart branch subnet
The branch has 50 computers and 1 printers and therefore.
Hosts No = 51
2y = [51 + 2].
26 = (64> 53)
Networks’ bits = 32 – 12 = 26
Networks’ IP Address = 172.16.20.0/26
Broadcasts IP Address: - 172.16.20.255
Subnets mask =255.255.240.0
Ipv6-mask =128-6=122

Information System Network Essentials in the Advanced Digital Computers Company 8
2.4.1.4 Rockdale branch subnet
The branch has 40 computers and 1 printers and therefore.
Hosts No = 41
2y = [41 + 2].
212 = (64> 43)
Networks’ Bits = 32 – 12 = 26
Networks’ IP Address = 172.16.21.0/26
Broadcasts IP Address: - 172.16.21.255
Subnets Mask =255.255.240.0
Ipv6-Mask =128-12=116
2.4.1.5 Bankstown H.O branch subnet
The branch has 8 computers and 1 printers and therefore.
Hosts No = 9
2y = [9 + 2].
24 = (16> 11)
Networks’ Bits = 32 – 12 = 28
Networks’ IP Address = 172.16.22.0/28
Broadcasts IP Address: - 172.16.22.255
Subnets Mask =255.255.240.0
Ipv6-Mask =128-4=124
2.4.1.6 Epping H.O branch subnet
The branch has 4 computers and 1 printers and therefore.
Hosts No = 5
2y = [5 + 2].
23 = (8> 7)
Networks’ Bits = 32 – 12 = 29
Networks’ IP Address = 172.16.23.0/29
Broadcasts IP Address: - 172.16.23.255
Subnets Mask =255.255.240.0

Information System Network Essentials in the Advanced Digital Computers Company 9
Ipv6-Mask =128-3=125
2.4.1.7 Server network branch subnet
The branch has 4 servers and therefore.
Hosts No = 4
2y = [4 + 2].
23 = (8> 6)
Networks’ Bits = 32 – 12 = 29
Networks’ IP Address = 172.16.24.0/29
Broadcasts IP Address: - 172.16.24.255
Subnets Mask =255.255.240.0
Ipv6-Mask =128-3=125
2.4.2 ADC IPv4 Address Schemes
Subnet-Name Subnet-Address Subnet-Mask Host Range of Address Broadcast-Address
City head office
(Accounts)
172.16.18.0/23 255.255.254.0 172.16.18.1-
172.16.18.63
172.16.18.64
City head office
(marketing)
172.16.17.0/25 255.255.255.128 172.16.17.1-
172.16.17.73
172.16.17.74
City head office
(Sales)
172.16.16.0/26 255.255.255.192 172.16.16.1-
172.16.16.124
172.16.16.125
Chatswood branch 172.16.19.0/25 255.255.255.128 172.16.19.1-
172.16.19.126
172.16.19.127
Leichhart branch 172.16.20.0/26 255.255.255.192 172.16.20.1-
172.16.20.62
172.16.20.63
Rockdale branch 172.16.21.0/26 255.255.255.192 172.16.21.1-
172.16.21.43
172.16.21.44
Bankstown H.O 172.16.22.0/28 255.255.255.240 172.16.22.1-
172.16.22.11
172.16.22.12
Epping H.O 172.16.23.0/29 255.255.255.248 172.16.23.1- 172.16.23.8

Information System Network Essentials in the Advanced Digital Computers Company 10
172.16.23.7
Server Network 172.16.24.0/29 255.255.255.248 172.16.24.1-
172.16.24.6
172.16.24.7
Chatswood WAN 172.16.19.0/25 255.255.255.128 172.16.19.1-
172.16.19.126
172.16.19.127
Leichhart WAN 172.16.20.0/26 255.255.255.192 172.16.20.1-
172.16.20.62
172.16.20.63
Rockdale WAN 172.16.21.0/26 255.255.255.192 172.16.21.1-
172.16.21.43
172.16.21.44
Bankstown WAN 172.16.22.0/28 255.255.255.240 172.16.22.1-
172.16.22.11
172.16.22.12
Epping WAN 172.16.23.0/29 255.255.255.248 172.16.23.1-
172.16.23.7
172.16.23.8
2.4.3 ADC-IPv6 Address scheme Plan
The below table shows the ipv6 addresses using IP address space 2001::ACAD:Bead:/60
Subnet Name Subnet Address And Mask Host Range Of Addresses
City head office
(Accounts)
2001:: acad:1001/122 2001:: acad:1001- 2001:: acad:103e
City head office
(marketing)
2001:: acad:1100/121 2001:: acad:1101- 2001:: acad:117e
City head office
(Sales)
2001:: acad:1200/119 2001:: acad:1201-2001:: acad:13fe
Chatswood branch 2001:: acad:1300/121 2001:: acad:1301- 2001:: acad:13e
Leichhart branch 2001:: acad:1400/122 2001:: acad:1401-2001:: acad:143e
Rockdale branch 2001:: acad:1500/122 2001:: acad:1501-2001:: acad:153e
Bankstown H.O 2001:: acad:1600/124 2001:: acad:1601-2001:: acad:160e
Epping H.O 2001:: acad:1700/125 2001:: acad:1701-2001:: acad:1706
Server Network 2001:: acad:1808/125 2001:: acad:1801-2001::acad:1806
Chatswood WAN 2001::acad:c000/121 2001::acad:c001- 2001::acad:c07e

Information System Network Essentials in the Advanced Digital Computers Company 11
Leichhart WAN 2001::acad:c100/122 2001::acad:c101-2001::acad:c13e
Rockdale WAN 2001::acad:c200/122 2001::acad:c201-2001::acad:c23e
Bankstown WAN 2001::acad:c300/124 2001::acad:c301-2001::acad:c30e
Epping WAN 2001::acad:c400/125 2001::acad:c401-2001::acad:c406
2.5 ADC-Network hardware Selections
The ADC network is connected using the routers and switches as in the table below where the
switches connect the local network components while the routers connect the LANs to the head
office networks.
Network Location Devices Models and series Number
required
Ports Hardware Selection
Justifications
Head Offices
(Sales, marketing
and Accounts)
Routers Cisco 2621-xm 1 24 Ports The router is used to connect
the network to internet services
providers and allow internet
access while the switches are
used to interconnect the local
hardware devices.
Switches Cisco 2950T-24 16 24 Ports
Chatswood branch Routers Cisco 2621-xm 1 24 Ports The router is required to link
network to head offices and
allow internet access while the
switches are used to connect the
local devices and the network
router together.
Switches Cisco 2950T-24 6 24 Ports
Leichhart branch Router Cisco 2621-xm 1 24 Ports The router is required to link
network to head offices and
allow internet access while the
switches are used to connect the
local devices and the network
Switch Cisco 2950T-24 6 24 Ports

Information System Network Essentials in the Advanced Digital Computers Company 12
router together.
Rockdale branch Router Cisco 2621-xm 1 24 Ports The router is required to link
network to head offices and
allow internet access while the
switches are used to connect the
local devices and the network
router together.
Switch Cisco 2950T-24 6 24 Ports
Bankstown H.O Router Cisco 2621-xm 1 24 Ports The router is required to link
network to head offices and
allow internet access while the
switches are used to connect the
local devices and the network
router together.
Switch Cisco 2950T-24 2 24 Ports
Epping H.O Router Cisco 2621-xm 1 24 Ports The router is required to link
network to head offices and
allow internet access while the
switches are used to connect the
local devices and the network
router together.
Switch Cisco 2950T-24 2 24 Ports
Server Network Router Cisco 2621-xm 1 24 Ports In this network the router
connects the server LAN to the
head office while the switch is
used to connect the network
servers together.
Switch Cisco 2950T-24 1 24 Ports
2.6 ADC Network Branches topologies
The ADC network infrastructure covers a wide area where all its branches are connected together
through the connection medium where each branch has its own network topology.
The network branches are made of only two network topologies which include the hybrid
topology and the star topology.