Designing Network Requirements For Advanced Digital Computer Company

IPv6 Addressing

Advanced Digital Computer Company is a computing company that mainly deals with the selling of the various computing devices to the residents of Australia country and beyond, it has various branches and they are distributed in many towns’ centers.

The company is allocated IP address by their internet service providers which includes the ipv4 and ipv6 as 172.16.0.0/20 and 2001: acad:: bead:/60 respectively where an IP address scheme will be used to allocate the various subnets to certain IP addresses depending with number of hosts and this will allow growth since the network is expected to undergo 100% growth resulting to doubling of the network devices.

1.1 The made assumptions

Below are some of the assumptions made in the network designing to enable the accommodation of all network devices including the one that will added after the network undergo 100% growth.

1. The network will have a total of six subnets which will be interlinked.
2. Each branch will be assigned its unique IP addresses and range depending with the number of hosts.

• There will be six subnets for the all six network branch locations.

1. There will be one or many printers in each subnet in a ratio of 1 printer: 70 computers.
2. Each network will be having the switch and router hardware depending on the number of the end devices in a subnet or branch.
3. For each member of the company there will be only one dedicated computer.

• The network devices and end devices connection will be established using the cables like the cat 5, 6 and 7.
• The subnets to the head office connection media will be fiber cables for higher access speed (Behrouz 2016).

1. The company will be supplied internet by the internet service providers using the fiber cables internet.

1.2 The Proposed Network requirements

Below are the proposed network’s requirements that will be considered in the network designing and implementation processes.

1. The network should have maximum uptime of 99.9% per day.
2. The network bandwidth should be at least 600 MHz or higher.

• There should be access to internet in all subnets.

1. There should be printing facilities in each subnet.
2. Network should allow data transmissions rates of 500 MBPS or higher.
3. There should be file storage and sharing over the network using network’s servers.

• There should be network downloading speed of not less than 300mbps.
• There shall be a network uploading speed of not less than 150mps.

1.3 The network connections Media

Below are some of the connection media where their respective prices are recorded to enable easy budgeting of the networking materials, these media will be used in the connection of the routers, switches, network printers and the computers in the subnets as summarized below (Douglas 2017).

Media type	Bandwidths	Data Transmissions Rates	Price per Meter	Justifications
Copper (cat5e cable)	350 MHz bandwidth per 100 Meters	1000mbps per 100 Meters data transmissions throughputs	AUD$0.3 each meter	This cat5e media is used to do the connection of the switches and the end point devices including printer, computer and the server due to the following: i.                    Low acquisition prices. ii.                  Are installed and configured in the network easily. iii.                They have quite high data transmission rates of 1000mbps as required in the network iv.                They support data transmissions of 100 meters from the source.
Copper (Cat6a Cable)	750 MHz bandwidth per 100 Meters	1 to 10gbps per 100 Meters data transmissions throughputs	AUD$0.6 EACH METER	This is the media chosen to enable the connection between the subnet main switch and the subnet router and it is better than cat5e cable in terms of speed and bandwidth and therefore selected due to the following.                     i.            Low acquisition prices.                   ii.            Are installed and configured in the network easily.                 iii.            They have quite high data transmission rates of 1-10gbps as required in the network                 iv.            They support data transmissions of 100 meters from the source.
Fiber-cables	20Ghzs bandwidth per 3-5kms	10-gbps data transmissions throughputs per 3-5kms	AUD$5.1 per meter	This media was selected to do the router to router connection between the subnets and the head office subnet and is recommended due to higher transmission rates and longer transmission distance and thus better for internet connections, below are other features that made it to be selected. i.                    It supports up to 10gbps transmissions rates. ii.                  It maintains highest uptime compared to other media. iii.                It can transmit data for 1- 5 kilometers per second. iv.                It has lowest latency thus allowing high transmission rate. v.                  It is able to withstand any electro-magnetic interference.

 1.4  ADCC Network addressing schemes

1.4.1 Calculation of the IP addresses

The internet service providers had provide the company with 172.16.0.0/20 IP address space to be used in the sub-netting the six network branches subnets as below (Forouzan 2014).

1.4.1.1  Head office branch

The head office has three LANs which include sales with 60 hosts, marketing with 35 hosts and the accounts with 30 hosts; however there are 2 printers in the sales, 1 printer in the marketing and 1 printer in the accounts departments therefore the total hosts will be approximately 254 hosts.

1. Head office (Sales)

Total Hosts = 122

2^x = (122 + 2).

2⁹ = 512 > 124

Network-bits = 32 – 9 = 23

Network-IP-Addresses = 172.16.1.0/23

Broadcast-IP-Addresses: – 172.16.1.255

Subnet-masks =255.255.254.0

Ipv6 mask=128-9=119

1. Head office (marketing)

Total Hosts = 71

2^x = (71 + 2).

2⁹ = 512 > 73

Network-bits = 32 – 9 = 23

Network-IP-Addresses = 172.16.1.123/23

Broadcast-IP-Addresses: – 172.16.1.255

Subnet-masks =255.255.254.0

Ipv6 mask=128-9=119

• Head office (accounts)

Total Hosts = 61

2^x = (61 + 2).

2⁹ = 512 > 63

Network-bits = 32 – 9 = 23

Network-IP-Addresses = 172.16.1.194/23

Broadcast-IP-Addresses: – 172.16.1.255

Subnet-masks =255.255.254.0

Assignment requirements

Ipv6 mask=128-9=119 

1.4.1.2       Chatswood branch

The chatswood will have a total of 104 hosts and 2 printers therefore.

Total Hosts = 106

2^x = (106 + 2).

2⁷ = 128 > 108

Network-Bits = 32 – 7= 25.

Network-Ip-Addresses = 172.16.2.0/25

Broadcast-Ip-Addresses: – 172.16.2.127

Subnet-Masks =255.255.255.128

Ipv6 mask=128-7=121

1.4.1.3       Leichhart branch

The Leichhart will have a total of 50 hosts and 1 printer therefore.

Total Hosts = 51

2^x = (51 + 2).

2⁶ = 64 > 53

Network-Bits = 32 – 6= 26

Network-Ip-Addresses = 172.16.3.0/26

Broadcast-Ip-Addresses: – 172.16.3.63

Subnet-Masks =255.255.255.192

Ipv6 mask=128-6=122 

1.4.1.4       Rockdale branch

The Rockdale will have a total of 40 hosts and 1 printer therefore.

Total Hosts = 41

2^x = (41 + 2).

2⁶ = 64 > 43

Network-Bits = 32 – 6= 26

Network-Ip-Addresses = 172.16.4.0/26

Broadcast-Ip-Addresses: – 172.16.4.63

Subnet-Masks =255.255.255.192

Ipv6 mask=128-6=122

1.4.1.5       Bankstown H.O branch

The Rockdale will have a total of 8 hosts and 1 printer therefore.

Total Hosts = 9

2^x = (9 + 2).

2⁴ = 16 > 11

Network-Bits = 32 – 4= 28

Network-Ip-Addresses = 172.16.5.0/28

Broadcast-Ip-Addresses: – 172.16.5.15

Subnet-Masks =255.255.255.240

Ipv6 mask=128-4=124

1.4.1.6       Epping H.O branch

The Rockdale will have a total of 4 hosts and 1 printer therefore.

Total Hosts = 5

2^x = (5 + 2).

2³ = 8 > 7

Network-Bits = 32 – 3= 29

Network-Ip-Addresses = 172.16.6.0/29

Broadcast-Ip-Addresses: – 172.16.6.7

Subnet-Masks =255.255.255.248

Ipv6 mask=128-3=125

/125/2001::acad:c401-2001::acad:c406

1.4.1.7       Server network branch

The Rockdale will have a total of 4 hosts therefore.

Total Hosts = 4

2^x = (4 + 2).

2³ = 8 > 6

Network-Bits = 32 – 3= 29

Network-Ip-Addresses = 172.16.7.0/29

Broadcast-Ip-Addresses: – 172.16.7.7

Subnet-Masks =255.255.255.248

Ipv6 mask=128-3=125 

1.4.2        ADC IPv4 Address Schemes

Subnet Name	Subnet Address	Subnet Mask	Host Range Of Address	Broadcast Address
City head office (Accounts)	172.16.1.194/23	255.255.254.0	172.16.1.194-172.16.1.254	172.16.1.255
City head office (marketing)	172.16.1.123/23	255.255.254.0	172.16.1.124-172.16.1.193	172.16.1.255
City head office (Sales)	172.16.1.0/23	255.255.254.0	172.16.1.1-172.16.1.122	172.16.1.255
Chatswood branch	172.16.2.0/25	255.255.255.128	172.16.2.1-172.16.2.126	172.16.2.127
Leichhart branch	172.16.3.0/26	255.255.255.192	172.16.3.1-172.16.3.62	172.16.3.63
Rockdale branch	172.16.4.0/26	255.255.255.192	172.16.4.1-172.16.4.62	172.16.4.63
Bankstown H.O	172.16.5.0/28	255.255.255.240	172.16.5.1-172.16.5.14	172.16.5.15
Epping H.O	172.16.6.0/29	255.255.255.248	172.16.6.1-172.16.6.6	172.16.6.7
Server Network	172.16.7.0/29	255.255.255.248	172.16.7.1-172.16.7.6	172.16.7.7
Chatswood WAN	172.16.2.0/25	255.255.255.128	172.16.2.1-172.16.2.126	172.16.2.127
Leichhart WAN	172.16.3.0/26	255.255.255.192	172.16.3.1-172.16.3.62	172.16.3.63
Rockdale WAN	172.16.4.0/26	255.255.255.192	172.16.4.1-172.16.4.62	172.16.4.63
Bankstown WAN	172.16.5.0/28	255.255.255.240	172.16.5.1-172.16.5.14	172.16.5.15
Epping WAN	172.16.6.0/29	255.255.255.248	172.16.6.1-172.16.6.6	172.16.6.7

 1.4.3        IPv6 Addressing scheme

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)	2001::acad: 00c2/119	2001::acad:00c3- 2001::acad:00fe
City head office (marketing)	2001::acad: 007b/119	2001:: acad: 007c- 2001:: acad: 00c1
City head office (SALES)	2001::acad:be00/119	2001::acad:be01-2001::acad: 007a
Chatswood branch	2001::acad:c000/121	2001::acad:c001- 2001::acad:c07e
Leichhart branch	2001::acad:c100/122	2001::acad:c101-2001::acad:c13e
Rockdale branch	2001::acad:c200/122	2001::acad:c201-2001::acad:c23e
Bankstown H.O	2001::acad:c300/124	2001::acad:c301-2001::acad:c30e
Epping H.O	2001::acad:c400/125	2001::acad:c401-2001::acad:c406
Server Network	2001::acad:c500/125	2001::acad:c501-2001::acad:c506
Chatswood WAN	2001::acad:c000/121	2001::acad:c001- 2001::acad:c07e
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

 1.5 ADC Network hardware Selection

The table below shows the various network routers and switches that are required in the various network branches where the switches are used to link the end devices together while routers link the branches subnet-works to the main router in the head office.

Below is the list of hardware used.

Network Location	Devices	Models and series	Number required	Ports	Justifications
Head Offices	Routers	Cisco 2620xm	1	24 Ports	The head office location network is made of four subnet-works which includes the sales, accounts and management and therefore more network switches are required where 7 switches are in the sales department, four in marketing and four in accounts department, however one is the distribution switch which is used to link the access layers switch and the network router.
Switches	Cisco 2960-24TT	15	24 Ports
Chatswood branch	Routers	Cisco 2620xm	1	24 Ports	There is one distribution layer switch that links other access layer switches and the network router while the router links the subnet to the head office.
Switches	Cisco 2960-24TT	6	24 Ports
Leichhart branch	Router	Cisco 2620xm	1	24 Ports	There is one distribution layer switch that links other access layer switches and the network router while the router links the subnet to the head office.
Switch	Cisco 2960-24TT	6	24 Ports
Rockdale branch	Router	Cisco 2620xm	1	24 Ports	There is one distribution layer switch that links other access layer switches and the network router while the router links the subnet to the head office.
Switch	Cisco 2960-24TT	6	24 Ports
Bankstown H.O	Router	Cisco 2620xm	1	24 Ports	There is one distribution layer switch that links other access layer switches and the network router while the router links the subnet to the head office..
Switch	Cisco 2960-24TT	2	24 Ports
Epping H.O	Router	Cisco 2620xm	1	24 Ports	There is one distribution layer switch that links other access layer switches and the network router while the router links the subnet to the head office.
Switch	Cisco 2960-24TT	2	24 Ports
Server Network	Router	Cisco 2620xm	1	24 Ports	There is one distribution layer switch that links the network servers and the network routers while the router is used to link the subnet with the head office network and allow internet access.
Switch	Cisco 2960-24TT	1	24 Ports

 1.6  Network locations topologies

Below are the various network locations topologies indicating how the devices are interlinked in the network and showing the network infrastructures.

There are two main types of network topologies in the entire network, these includes the hybrid topology in the head office where there are three LANs that are linked to form one hybrid network topology  ,however all the other network areas subnets has star topologies where all the network devices are connected in a central point using the distribution layers switches as below (Tom 2015).

1.6.1  Head office topology (Star/Hybrid Topology)

 1.1         Proposed Internet Access

1.1.1        Fiber optic cable internet access

The fiber optic cable is the selected type of internet supply from the internet services providers in Australia, however the internet is connected through the internet point of presence in the head offices and the internet services provider will use the DHCP technology to automatically assign ip address to the connected devices.

The fiber cable was selected due to its high transmission speed, confirmed up-time services, ability to withstand interferences, ability to transmit signals for long distance, and reliability in un-limited data supply (William 2014).

Conclusion

This report highlighted various network design items where the various assumptions and requirements were identified, the sub-netting was done and the respective IP addresses were assigned and the network topologies were also drawn for all company’s’ branches.

Therefore the implementation of this network will enable the company to have efficient communication between the staffs and also provide internet accessibility. 

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.