IT Infrastructure | Report
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Added on 2020-03-16
IT Infrastructure | Report
Added on 2020-03-16
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Running head: IT Infrastructure 1IT InfrastructureNameAffiliate Institution
Running head: IT Infrastructure 2Table of Contents1 Introduction...................................................................................................................................31.1 Aim and Objectives................................................................................................................31.2 Company Background............................................................................................................32 IT Infrastructure Components.......................................................................................................32.1 Hardware Components...........................................................................................................42.2 Software Components............................................................................................................53 Three-Layers Hierarchal Model...................................................................................................63.1 Current iTech IT Infrastructure Analysis...............................................................................73.2 Future iTech IT Infrastructure................................................................................................83.3 Geographical Scope of the iTech Network............................................................................83.4 Scalability of the iTech Network...........................................................................................94 Dedicated Server...........................................................................................................................94.1 Design Proposal.....................................................................................................................94.2 Logical Design.....................................................................................................................115 Cloud Based Design...................................................................................................................125.1 Amazon Web Services.........................................................................................................135.2 Microsoft Azure...................................................................................................................146 Network simulation....................................................................................................................156.1 Access layer diagram...........................................................................................................156.2 DHCP configuration............................................................................................................166.3 Configuration of iTech DNS and iTech Web Servers.........................................................176.4 Configuration of Dynamic Network....................................................................................19Conclusion.....................................................................................................................................21Recommendation...........................................................................................................................21Bibliography..................................................................................................................................22
Running head: IT Infrastructure 31 IntroductionNetworking is the interconnection of several devices so as to enhance communication andresource sharing. This enhance ease of communication between stakeholders, businesses,suppliers, vendors and customers. The report further evaluates the networking requirements thatiTech needs in place in order to implement the new platform, that is, the networking components,the three-layer hierarchical model, dedicated server design proposal, cloud based designproposal, network simulation and recommendation.1.1 Aim and ObjectivesScalability of the network infrastructure to facilitate addition of more equipment. To facilitate easy management, control, monitoring and troubleshooting of iTech networkinfrastructure and also control access of network resources.To improve the network security for the operation of company’s daily processes without externalinterference by third party members including hackers, viruses among other threats.1.2 Company BackgroundiTech is a software development company which has over 900 hundred computers distributedacross its three adjacent buildings, 5-story each, each building containing 300 computers. LANdesign is similar in all the three buildings. One building has been dedicated to be the data center(DCB) on the second floor. DCB offers email and web services to the iTech employees. It alsooffers dynamic IP address, file sharing and domain name server (DNS) services.www.iTech.org.au is the company’s domain name. the company has realized that the currentnetwork environment is poorly designed and thus wants to completely replaced it with a moderninfrastructure either the dedicated server or cloud infrastructure.
Running head: IT Infrastructure 42 IT Infrastructure Components These are the various devices and equipment that will facilitate deployment and implementationof the new network infrastructure for iTech. In order to design a good network that will meet theorganization objectives, one needs to clearly define these components required both hardwareand software.12.1 Hardware ComponentsThe major network hardware components that itech requires to set up the new infrastructureinclude: Router- this component is used to forward packets by identifying the best route to which thepacket will pass to reach its destination. A routing table is used to determine the routinginformation to find the best route to transmit packets. Switches-this component is used to expand the network as it contains many ports. It is normallyfound on layer two of the OSI model. It is regarded as an intelligent hub because it transmitsframes only to the ports taking part in communication. The switch uses the mac address todetermine where the frame is destined. Network interfaces Controller (NIC)-this device enables the computer to physically be able toconnect to network cables and the capability of interpreting low level network instructions andinformation. The NIC has distinct media access control address that is stored on it permanentlyand can be used to identify the computer uniquely. Repeaters- this component is used to boot the network signal by receiving, cleaning andregenerating it. Re-transmission of the network signal is done at a level of high power so as tocover longer distance. Repeaters are found on the physical layer of the OSI model. Thiscomponent uses small very short time for signal regeneration. Bridges- this component operates on the data link layer and is used to form a single network byinterconnecting different segments of networks. Bridges, unlike hubs don’t broadcast signals toall the ports rather it uses mac address to identify the destination port that is to receive the signal1Bruce A Hallberg,Networking(McGraw-Hill, 2014).
Running head: IT Infrastructure 5Cables and connectorsCables are components that are used to link to network components. Basically they are specialwires with unique properties. There are several types of cables including the latest fiber cable,twisted pair cable, coaxial cable and many others. Connectors form the end points where thecable is terminated. They include components like the RJ45.Modems- this device is used to facilitate internet connection via telephone lines. A modem is notattached to the motherboard rather it is a separate entity that can be mounted to the motherboardusing the PCI slots. It is mostly used in dial-up and DSL connections. iTech requires these components in order to set up and implement the new infrastructure, thecompany may not necessarily use all the components mentioned above. Purchase of theseequipment depends on the company requirements, objectives, size of the company and numberof users. 2.2 Software ComponentsHardware components cannot make the network usable, it needs some software to control andmanage them. The following are some of the software needed by iTech to install a newinfrastructure. Local Operating System- this OS is installed on the client computers so as to enable them accessand enjoy the network services and resources like files, share printer among others. Examplesinclude Windows 2007, 2008, 2010, Linux, UNIX and many more. Network Operating System- this OS run on servers and computers to enable them communicateover the network. 2 Firewalls- this software forms the first level defense of the network. Sometimes it is called thenetwork gate keeper. It contains a set of rules and procedures that the network uses to identifywhich traffic to go through and which is to be blocked. These guidelines can be customized tomeet the objectives of the organization. iTech will need this software in order to maintain thesafety of the network components resources and services available all the time2Doug Lowe,Networking All-In-One Desk Reference For Dummies(Wiley, 2008).
Running head: IT Infrastructure 63 Three-Layers Hierarchal Model Network are complex entities which contains many protocols, ad different technologies. Todesign a reliable network a 3 layered hierarchical model was developed. This model aids indesigning, implementing, monitoring, controlling and troubleshooting a network. Each layer hasspecific characteristics and functionality, thus reducing the complexity of the network. These layers are Core, distribution and access layers which can be represented diagrammaticallyas shown below. Figure 1: Three-Layers Hierarchal ModelAccessLayer
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