Advanced Computer Company Network: Subnets, IP Address Space, And Hardware

Requirements for the Proposed Network

Advanced Digital Computer Company network

The advanced computer company network is meant to combine various companies’ branches that are located in different locations where these branches have different subnet works that be utilize 192.168.0.0 IP address space where each subnet will be assigned an IP address (Andrew 2015).

The network is established in order to enable easy network communication, sharing of resources including the printers, sharing of the network servers and enable the internet connectivity to all branches through the head office branch.

Assumptions made.

Before the implementation of this proposed network that will support 100% growth of the network which will result in the increase in the computers and the network devices there are various assumptions that were made which include the following:

1. The company network will be using the same IP address space for sub netting purpose.
2. Each branch will be having its own subnet.

• Each subnet will be having at least one printer device.

1. The servers will be situated in the head office but in a separate subnet.
2. Each user in the company will have access to only one computer.
3. Each end devices including the switch will be connected using cable media.

• The switch devices will be connected to the routers using cable media.
• All the branches subnets will be connected to the head office through fiber optic cables (Behrouz 2016).

Network requirements

In the implementation of the proposed network there are various requirements that it is supposed to meet which includes the Following:

1. Network should allow users to access the internet services.
2. The network should enable the users to print their documents.

• The network should have a signal bandwidth of 500 MHz and above.

1. The network should have data transmission speed of 500mbps and above.
2. The network should enable the users to share and store the records in the server.
3. The network should have a download speed greater than 250 mbps.

• The network should have upload speed of 100 mbps or higher.

Proposed connection Media

In this network there are various connections that will be used to link the various network devices and the respective end devices including the computers, printers and servers (Douglas 2017).

The table below summarizes the various media used in the network implementation process.

Media Name	Bandwidth	Transmission Rate	Unit Meter Price	Justification
Copper Twisted Pair Cable(Cat 5)	Has bandwidth of 100 MHz	It supports data rate up to 100 Mbps	AUD$0.2 per meter	The cat 5 cables are used to do the connection of the end devices including the computers, printers and servers to the network switches .however they are used due to the following reasons. i.                    They are cheap to acquire. ii.                  They are easy to do installation in the network. iii.                They have relatively strong data transmission speed. iv.                They allow data transmission up to 100 meters.
Copper Twisted Pair Cable(Cat 6)	Has bandwidth of 250 MHz	It supports data rate up to 1 Gbps	AUD$0.5 per meter	The cat 6 cables were selected to be used in the connection between the routers and the switches since their transmission speed is relatively higher than the cat 5 cables. Below are some of the features of the cable. i.                    Relatively cheap to buy. ii.                  They have relative high transmission speed of 1gbps. iii.                They support transmission of data up to 100 meters.
Fiber optic cable	Has bandwidth of 20Ghz	It supports data rate up to 10 Gbps.	AUD$4.1 per meter	The fiber optic cable was selected to be used in the connection of the subnets routers to the head office subnet routers in order to access the servers and internet access. Below are some of the reasons of selecting the fiber optic medium. i.                    Has highest data transmission rate of up to 20 GBPS. ii.                  It has ability to transmit data over 3 kilometers successfully. iii.                It is not affected by the electromagnetic interference and thus the transmitted data is secured.

 Network address schemes

IP address calculations

The company was allocated the 192.168.0.0/24 IP addresses where there were  14 departments subnet that were linked  where 14 subnets were used and below show the calculation of each subnets’ hosts and the IP address subnet mask and respective broadcast address (FOROUZAN 2014).

1. The first subnet is called the City head office (Accounts) subnet that has total of 60 hosts but it will double to be 120 hosts after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation.

No of Hosts = 120

2ⁿ = 120 + 2

2⁷ = 128 > 122

Networks bits = 32 – 7 = 25

Network-IP-Address = 192.168.1.0/25

Broadcast IP Address: – 192.138.1.123 /25

Subnet mask =

1. The City head office (marketing) subnet has total of 35 hosts but it will double to be 70 hosts after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation. 

No of Hosts = 70

2ⁿ = 70 + 2

2 = 128 > 72

Networks bits = 32 – 7 = 25

Network-IP-Address = 192.168.1.128/25

Broadcast IP Address: – 192.168.1.255/25

Subnet mask =255.255.255.128

1. The City head office (account) subnet has total of 30 hosts but it will double to be 60 hosts after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation. 

No of Hosts = 60

2ⁿ = 60 + 2

2⁷ = 128 > 72

Networks bits = 32 – 7 = 25

Network-IP-Address = 192.168.1.256/25

Broadcast IP Address: – 192.168.1.255/25

Subnet mask =255.255.255.128

1. The Chatswood branch subnet has total of 52 hosts but it will double to be 104 hosts after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation. 

No of Hosts = 104

2ⁿ = 104 + 2

2⁷ = 128 > 106

Networks bits = 32 – 7 = 25

Network-IP-Address = 192.168.2.0/25

Broadcast IP Address: – 192.168.2.127

Subnet mask =255.255.255.128

1. The Leichhart branch subnet has total of 25 hosts but it will double to be 50 hosts after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation. 

No of Hosts = 50

2ⁿ = 50 + 2

2⁶ = 64 > 52

Networks bits = 32 – 6 = 26

Media Used in the Network Implementation Process

Network-IP-Address = 192.168.3.0/26

Broadcast IP Address: – 192.168.3.63

Subnet mask =255.255.255.192

1. The Rockdale branch subnet has a total of 20 hosts but it will double to be 40 hosts after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation. 

No of Hosts = 40

2ⁿ = 40 + 2

2⁶ = 64 > 42

Networks bits = 32 – 6 = 26

Network-IP-Address = 192.168.4.0/26

Broadcast IP Address: – 192.168.4.63

Subnet mask =255.255.255.192

1. The Bankstown H.O branch subnet has total of 4 hosts but it will double to be 8 hosts after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation. 

No of Hosts = 8

2ⁿ = 8 + 2

2⁴ = 16 > 10

Networks bits = 32 – 4= 28

Network-IP-Address = 192.168.5.0/28

Broadcast IP Address: – 192.168.5.15

Subnet mask =255.255.255.240

1. The Epping H.O branch subnet has total of 2 hosts but it will double to be 4 hosts after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation. 

No of Hosts = 4

2ⁿ = 4 + 2

2³ = 8 > 6

Networks bits = 32 – 3= 29

Network-IP-Address = 192.168.6.0/29

Broadcast IP Address: – 192.168.6.7

Subnet mask =255.255.255.248

1. The Server network branch subnet has a total of 4 hosts but it will not double after growth of the network therefore its IP address is allowed for future growth as illustrated in calculation. 

No of Hosts = 4

2ⁿ = 4 + 2

2³ = 8 > 6

Networks bits = 32 – 3= 29

Network-IP-Address = 192.168.7.0/29

Broadcast IP Address: – 192.168.7.7

Subnet mask =255.255.255.248

IPv4 Addresses

Subnet Name	Subnet Address	Subnet Mask	Host Range Of Address	Broadcast Address
City head office (Accounts)	192.168.1.200/23	255.255.254.0	192.168.1.201-192.168.1.262	192.168.1.263
City head office (marketing)	192.168.1.126/23	255.255.254.0	192.168.1.127-192.168.1.198	192.168.1.199
City head office (Sales)	192.168.1.0/23	255.255.254.0	192.168.1.1-192.168.1.124	192.168.1.125
Chatswood branch	192.168.2.0/25	255.255.255.128	192.168.2.1-192.168.2.126	192.168.2.127
Leichhart branch	192.168.3.0/26	255.255.255.192	192.168.3.1-192.168.3.62	192.168.3.63
Rockdale branch	192.168.4.0/26	255.255.255.192	192.168.4.1-192.168.4.62	192.168.4.63
Bankstown H.O	192.168.5.0/28	255.255.255.240	192.168.5.1-192.168.5.14	192.168.5.15
Epping H.O	192.168.6.0/29	255.255.255.248	192.168.6.1-192.168.6.6	192.168.6.7
Server Network	192.168.7.0/29	255.255.255.248	192.168.7.1-192.168.7.6	192.168.7.7
Chatswood WAN	192.168.2.0/25	255.255.255.128	192.168.2.1-192.168.2.126	192.168.2.127
Leichhart WAN	192.168.3.0/26	255.255.255.192	192.168.3.1-192.168.3.62	192.168.3.63
Rockdale WAN	192.168.4.0/26	255.255.255.192	192.168.4.1-192.168.4.62	192.168.4.63
Bankstown WAN	192.168.5.0/28	255.255.255.240	192.168.5.1-192.168.5.14	192.168.5.15
Epping WAN	192.168.6.0/29	255.255.255.248	192.168.6.1-192.168.6.6	192.168.6.7

 IPv6 Addresses

After obtaining the respective ipv4 address scheme they are converted to the respective ipv6 address where the subnet and its mask and the host range addresses are identified as below.

Subnet Name	Subnet  Address And Mask	Host Range Of Addresses
City head office (Accounts)	fe80::c0a8:200/119	fe80::c0a8:201- fe80::c0a8:262
City head office (marketing)	fe80::c0a8:126/119	fe80::c0a8:127- fe80::c0a8:198
City head office (SALES)	fe80::c0a8:0/119	fe80::c0a8:1-fe80::c0a8:12d
Chatswood branch	fe80::c0a8:700/125	ff00::c0a8:707-fe80::c0a8:706
Leichhart branch	ff00::c0a8:27f/121	fe80::c0a8:201-fe80::c0a8:27e
Rockdale branch	fe80::c0a8:300/122	fe80::c0a8:301-fe80::c0a8:33e
Bankstown H.O	fe80::c0a8:400/124	fe80::c0a8:401-fe80::c0a8:40e
Epping H.O	fe80::c0a8:600/125	fe80::c0a8:601-fe80::c0a8:606
Server Network	fe80::c0a8:700/125	ff00::c0a8:707-fe80::c0a8:706
Chatswood WAN	ff00::c0a8:27f/121	fe80::c0a8:201-fe80::c0a8:27e
Leichhart WAN	fe80::c0a8:300/122	fe80::c0a8:301-fe80::c0a8:33e
Rockdale WAN	fe80::c0a8:400/124	fe80::c0a8:401-fe80::c0a8:40e
Bankstown WAN	fe80::c0a8:600/125	fe80::c0a8:601-fe80::c0a8:606
Epping WAN	fe80::c0a8:700/125	fe80::c0a8:701-fe80::c0a8:706

 Network hardware (Switches and Routers) to be used

In this network there are various hardware devices which were used to connect the end devices and also to interconnect the branches subnets to the head office as shown in the table below.

Network location routers switch numbers of devices justification

Network Location	Devices	Model	Units	Number Of Ports	Justification
Head Offices	Router	Cisco 2800	1	24 Ports	This network branch had three LANs that formed the entire WAN therefore the 11 switches were used  to connect the end devices in the LANS and one switch was used to connect the WAN router to other switches and network end devices ,however the router was used to connect to the other branches  networks and to the internet service providers.
Switch	Cisco-Catalyst-2960	12	24 Ports
Chatswood branch	Router	Cisco 2800	1	24 Ports	This network had one router to connect to the network to head office and six switches that linked the end devices and the network routers
Switch	Cisco-Catalyst-2960	6	24 Ports
Leichhart branch	Router	Cisco 2800	1	24 Ports	This network had one router to connect to the network to head office and four switches that linked the end devices and the network routers
Switch	Cisco-Catalyst-2960	4	24 Ports
Rockdale branch	Router	Cisco 2800	1	24 Ports	This network had one router to connect to the network to head office and three switches that linked the end devices and the network routers
Switch	Cisco-Catalyst-2960	3	24 Ports
Bankstown H.O	Router	Cisco 2800	1	24 Ports	This network had one router to connect to the network to head office and two switches that linked the end devices and the network routers
Switch	Cisco-Catalyst-2960	2	24 Ports
Epping H.O	Router	Cisco 2800	1	24 Ports	This network had one router to connect to the network to head office and two switches that linked the end devices and the network routers
Switch	Cisco-Catalyst-2960	2	24 Ports
Server Network	Router	Cisco 2800	1	24 Ports	This network had one router to connect to the network to head office and two switches that linked the end devices and the network routers
Switch	Cisco-Catalyst-2900	2	24 Ports

 Types of Network topologies per location

The entire network has different network structure depending on the type of network devices and the end devices each location has .Below are the various network topologies used in the various network locations.

The head office location uses the hybrid type of topology where the three department LANs and the Server network are connected using star topology which are then connected all together in the head office main router (Tom 2015).

However the other locations networks uses star topology network since all the end devices are linked to one router and then to the network routers as shown in the topology diagrams below.

Internet Access mode

The company proposes to be connected to internet services where all the branches will be linked to internet service providers through the head office internet point of presence.

The fiber cable is the proposed source of the company internet because the company has many number of subnet works that require internet access at a relative high speed.

Below are some features that made me choose fiber cable internet access.

1. The installation and 3 years maintenance service is free from the vendor company.
2. It is guaranteed in the uptime services.

• It supports high uploading and downloading speed.

1. It provides un-limited source of internet data.
2. It has low latency and thus packets sending are very fast (William 2014).
3. It is highly reliable and not prone to services downtimes.

Conclusion

In this report various aspects of advanced digital computer company network had been discussed which includes the major assumptions ,system requirements, calculation of the IP address in both ipv4 and ipv6 format ,the drawing of the network topologies and selection of network media and hardware devices. Therefore in conclusion I found it necessary if the network will be implemented in order to improve service delivery to their clients and enable easy sharing of resources. 

Reference

Andrew, S. (2015) Computer Networks.2^nd edn. New York: Prentice Hall.

Behrouz ,A.(2016) Data Communication and Networking. 4^th edn.New York: McGraw-Hill Education.

Douglas,C.(2017) Internetworking with TCP/IP, Volume1.1^st edn.California: Addison-Wesley Professional.

Forouzan,I.(2014) Computer Networks: A Top – Down Approach.5^th edn.New York: McGraw-Hill.

Tom ,C.(2015) IPv6 Address Planning: Designing an Address Plan for the Future.3^rd edn. San Francisco: O’Reilly Media.

William,S.(2014)  Data and Computer Communication. 2^nd edn. New Delhi: Tata McGraw Hill.

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