Network Architecture Outline
Network Architecture Outline
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This 0 page Study Guide was uploaded by expert Notetaker on Tuesday November 17, 2015. The Study Guide belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 17 views.
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Date Created: 11/17/15
Network Architecture I Overview of current network Architecture A Current State of Network Architecture and connections Portals Web servers etc B What needs to be changed and why II Proposed Architecture and Topology for the network A User Computers B Satellite servers C Main server cluster D Internet and Infrastructure E Back up contingency plans III Equipment that will be used in the new network A Routers B Domain C DNS D Firewalls E Internet F Back up equipment IV Costs and rough implementation Estimates A Costs of Equipment Purchase B Costs of Service Contracts C Implementation Estimates Write up Current State of Network Architecture and connections The network of Huffman Trucking is outdated Four geographical locations exist with two individual networks exist at each location one office network and one plant network One similarity between the various sites is the lack of consistency in the architecture and equipment utilized for the networks The office networks connect directly to the Internet but do not have the security of a firewall to secure the network from hackers and potential virus downloads the California site houses the web server The connections at the Missouri and Ohio plants have connections through a fractional T1 yet the California site utilizes a standard AOL model connection which is dialup Even though the wiring infrastructure is consistent across the networks the cabling is rated Cat 3 cabling There is also no clear voice network California runs off a standard PBX whereas Missouri and Ohio both have Avaya digital switches Finally the PCs run anywhere from Windows 31 to Windows XP The disparity in the various networks of Huffman requires a further look at how the company can transition from the mismatched array of telecommunications and data transportation equipment to a network that is scalable and affordable to maintain What needs to be changed and why One of the most important characteristics of solid IT infrastructure is consistency The PCs that are the most antiquated should be replaced with models with faster processors and larger storage capacities in addition the PCs should all use Windows XP Professional as the standard OS The servers must utilize at least Windows 2000 Server if not Windows 2003 Server in order to provide the most current security standards and networking protocols Windows 31 and Windows 98 do not possess the capability of operating efficiently and securely on serverclient network architecture The next change arises from the physical infrastructure of the networks Cat 3 cabling supports data transfer rates up to 10 Mbps which is slow by today s networking standards of 100 Mbps or more of throughput on a LAN or WAN Stable data throughput is provided with the installation and usage of Cat 6 cabling in addition Cat 6 is scalable and can be used in the years to come when gigabit standards come to fruition in networked environments Connections between locations and to the internet need to be consistent Efficient operations ow is not achieved with the use of AOL dialup at the California site while utilizing a fractured T1 at the Missouri and Ohio plants in addition the placement of the Web server at the California plant compromises network connectivity and speed because of the unpredictability of using a modem for a server Since the various sites operate independently an outage at a specific site will not impact the other sites however communications between the site that is down and the transfer of networked devices such as servers will be compromised because of the outage Proposed Architecture and Topology for the network Team D is proposing a total reorganization of Huffman Trucking s Network Architecture based on the reasons stated above This new network will have scalability integrity and easier manageability It will also have to the ability to load balance between sites if one or multiple sites go down The topology itself will be a star topology This will help with troubleshooting the locations of problems while at the same time not crashing the network The network itself will be a Window 2003 Server network which provides clientserver architecture and the security of various protocols and security features provided by the network operating system or NOS Servers At each geographical location there will be a cluster of 3 servers with 6 servers at the main headquarters The Satellite clusters will have 3 main functions One server will act as a secondary Domain Name Server DNS the second server will be a local file storage and printing server The third server will act as a fail overbackup for the other two The main server cluster located at Headquarters will have one Server as the primary DNS the second server will be a Citrix server for sales the board accounting and any other employees that need to be able to work from home but VPN is insufficient to the task The third will be the main applications and data server This server will hold the files and folders used by all departments in the company The satellite server used for local storage will have information pertaining to the files and folders used by the satellite locations but the main data server will be the central repository where backups and source files and folders are stored This will allow personnel from all over the company to access needed files and folders irrespective of geography The fourth will be a mail server using Exchange 2003 Standard This will allow up to 67 Gigabytes GB worth of total email space across the company If the size reaches more than the 67 GB limit Huffman will have to upgrade to enterprise The fifth server will be a back up server connected to a tape drive Backups will be able to be done in full incremental and differential schemes The sixth and final server will be a load balancing server for the clusters This will allow traffic to continue between sites if one or two sites go down Internet and infrastructure The infrastructure will need to be taken out and all wire runs rerun with Cat 6 gigabit The network itself will not immediately need gigabit speeds it will run at 100 mbps but in the future the need will arise for Cat 6 doing this now will ensure that the cost of future upgrading is some what diffused Internet for the company will consist of a main T1 internet portal at the headquarters All satellites will have a managed VPN line into headquarters This will keep all the satellites in the domain seamlessly and will also hinder outside access to the other satellites because all outside connections have to come through the main firewall For ease of trouble shooting computers and servers the IT administrator can simply remote connect to the hardware name or the IP address of the affected machine without having to be in the same location BackupContingency The equipment at each site and at headquarters is designed with a high degree of redundancy If a server goes down at a satellite site there is a back up ready to take over temporarily while the original server is serviced repaired or replaced All equipment purchased will come with service and replacement warranties The servers will have 4 hour part turn around This means that if a server or drive goes down a replacement will be delivered in less than 4 hours If the main DNS at headquarters fails the one of the secondary DNS will take over The back up server will have a tape drive and will perform backups daily
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