Network Design For Advanced Digital Computer Company

Network Media

The Advanced Digital Computer organization is just started having Head Quarters working in the city, and with branches in Parramatta, Hornsby and Sutherland. It also operates with two small home offices that are in Bankstown and Epping. These branch offices are connected to head office by means of WAN by having Internet access at each office. They are planning to reconstruct its network to take into consideration a normal 100% extension throughout the coming 5 years. They will have same number of branch offices in next five years but they are expecting to have increased number of staff in another five years. The server room will have 4 servers that are sufficient according to the requirement for future use. Being designated as network consultant, my duty is to design network plan for Advanced Digital Computer organization.

I recommend 100 Mbps Ethernet for Advanced Digital Computer organization. Ethernet is the most broadly utilized LAN technology. 100-Mbps Fast Ethernet is the type of Ethernet that can be utilized for high-transfer speed devouring customers or servers. An Ethernet LAN is precisely provisioned to meet data transfer speed prerequisites with better components that include NICs, cables as well as internetworking devices that can meet the most stringent demands for accessibility. By utilizing the suitable Ethernet availability that can provide vital speed to the parts of the system with very reasonable expenses. WLAN 802.11 also possess some security protocols that were produced to give better security from that of a wired LAN. (Oppenheimer, P., 2010).

Ethernet technology can be used in many ways:

1. Ethernet speed of 10 Mbps will be utilized at the access layer to give better access to clients. Also, 100-Mbps Fast Ethernet can be utilized for high-data transfer speed to clients or servers.
2. Gigabit Ethernet can be utilized as the connection between the access layer as well as networking systems that can support the network traffic from Ethernet fragment on the access interface.
3. In order to get better performance for client server model in the organization, and to maintain a strategic distance from bottlenecks at the server, Fast Ethernet or Gigabit Ethernet connections can be utilized to connect the servers. Fast Ethernet can be used to avoid slow network.
4. It can be used as the connection among distribution layer as well as the core.

It can be used between switches as the backbone of organization. (Mcquerry, S., 2004).

The different networking devices that are required for the usage procedure incorporates – switches, routers, firewalls, etc. This list incorporates various devices such as configuring VPN for the remote access. These devices should be tried before usage as they can set aside long lead time for the output. Likewise VPN firewall should be installed in the middle of switch that approaches the VPN and a switch that advances movement into the grounds framework. The firewall must help Ethernet interfaces that are used as a part of the network. (Oppenheimer, P., 2011). A switch or router associates with the modem through an Ethernet link and gives network to different systems. As compared to switches, routers can enable us to interface two systems together. In case of ADS, we can use VPN empowered switch to give a protected association with those workplaces. Routers and switches with a DSU/CSU give T1 links to branch offices. It has in build firewalls and propelled feature like Web filtering. (Steele, B., 2017).

IPv4 Addressing

Minimum one router will be required at each location. But as there are 125 hosts at head office, I will propose five routers. For Chatswood, it will good if we use 3 routers and two routers will be recommended for Leichhart branch office. So total of fourteen routers will be required. These routers will connect with WAN. Switch can be used to make the network traffic at very fast speed. One switch can be used at server room. The list of recommended hardware required for setting network is given below:

NetGear Wifi Cable Modem Router – $120 (per piece)                                

Cisco Smart 24 port Switch – $420 (per piece)

Cisco SA540 firewall – $400 (at Head office server farm)

I would like to propose hierarchal topology for HO. Utilizing a hierarchical network topology it can enable to limit costs. We can buy the suitable internetworking devices for each layer of the hierarchy, avoiding expenses on pointless highlights for a layer. Additionally, the secluded idea of the hierarchical model empowers exact scope organization inside each layer of the hierarchy and it reduces squandered transmission capacity. System administration obligation and system administration frameworks can be disseminated to the distinctive layers of network to control administration costs. If adaptability is a noteworthy objective, hierarchical topology is prescribed in light of the fact that seclusion in an outline empowers making plan components that can be replicated as the system develops. Since each example of a module is reliable, and easy to design and actualize. (Oppenheimer, P., 2010) 

As there are 4 hosts at Bankstown home office and 2 hosts at Epping, mesh topology will be better option. But in case of Chatswood and Leichhart with 52 and 25 hosts respectively, hierarchical topology will be best. 

Dependent upon the ISP and the associating development, diverse organizations are available like virus checking, video on demand and data storage. The organization must pick ISP who can give a speed of min. 1.5 Mbps or higher for using DSL advancement. ISPs must have the ability to recognize and transfer information to end customers and diverse ISPs using an arrangement of developments. Frameworks organization devices that are used as a part of ISP must be awesome and quick devices with redundancies. ISP must consider the physical requirements, for instance, control and also ventilating. (Reid, A. and Lorenz, J., n.d).

Wireless network will be best option for the organization. The organization can utilize their own DNS server since it gives direct access to all systems administration devices and can be easily consolidated into whatever structure the association will use to manage the customer’s domain. The association can set their own specific TTL values and different parameters. The association can without much of a stretch keep up their updates at whatever point required. It can make cost cheap. This administration can give quick, solid and better DNS that can access the domain hosting and can also provide control settings. The DNS can provide faster access. (Patullo, K., n.d). 

References

Deep, G. & Dr. Kush, A. (2010). Proposal for low cost wireless. International Journal of Computing and Business Research (IJCBR) Volume 1, N. 1 December – 2010. [Online] Available at: https://www.researchmanuscripts.com/PapersVol1N1/IJCBR-5.pdf [Accessed 17th Oct 2017]

Deploying secure wireless network services.  Avaya Inc. (2011). [Online] Available at: https://www.avaya.com/en/documents/dn5244.pdf?t=0 [Accessed 17th Oct 2017]

Mcquerry, S. (2004). Choosing LAN Cabling Options  [Online] Available: https://www.ciscopress.com/articles/article.asp?p=169686&seqNum=3 [Accessed 17th Oct 2017]

Oppenheimer, P. (2010). Top-Down Network Design – Third Edition. [Online] Available at: https://www.valleytalk.org/wp-content/uploads/2013/01/top-down-network-design-3rd-edition.pdf [Accessed 17th Oct 2017]

Patullo, K. (n.d). Configuring OpenDNS on your Network. [Online] Available at: https://support.opendns.com/hc/en-us/articles/227988127-Configuring-OpenDNS-on-your-Network#No_Directions [Accessed 17th Oct 2017]

Reid, A. & Lorenz, J. (n.d). Networking for Home and Small Businesses, CCNA Discovery Learning Guide. [Online] Available at: https://books.google.co.in/books?id=cM0SoF-uxnsC&pg=PT752&lpg=PT752&dq=ISP+in+australia+who+can+provide+services+of+email+server,+ftp,+dns&source=bl&ots=S3t8TOlv6L&sig=w1fuVbZEU0pFClzCk4sjKh5M4hQ&hl=en&sa=X&ved=0ahUKEwiox4DE_u_WAhXHFpQKHQT-C1wQ6AEIVTAB#v=onepage&q=ISP&f=false [Accessed 17th Oct 2017]

Steele, B. (2017). What Equipment Do I Need to Set Up a Network for a Business? [Online] Available at: https://smallbusiness.chron.com/equipment-need-set-up-network-business-57093.html [Accessed 17th Oct 2017]

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