Logical and physical networking Essay Example for Free

Logical and physical networking Essay As used in computer world, networking is simply the connection of two or more computers in order for the computers to communicate to each other and share resources and information. This is very important for an office set up. It enables the office workers to transfer computer files without moving from their respective work stations. It also makes it possible for all the computers in an organization to be connected to one printer. This in return brings about considerable reduction of the employees movement in the office leading to reduction of wasted time due to unnecessary movement. The movement of information is also very fast. Networking of computers consists of two parts which is the physical networking and logical networking. Physical networking As depicted from the term, this is where the physical aspect of the networking is addressed. The components to be networked are listed and the exact location of these components put into consideration. The distance of the components from each other is considered as this affect the cable length to be used. If a client consults an expert to help him in networking then he/she will give more of the physical networking details. The expert in return might fine tune the details in order to come up with a drawing that represents the actual physical network. The physical layout map represents the diagram of the actual floor (the way it would appear when viewed from the ceiling). Various physical components like the, printers, fax machines and scanners are represented using the appropriate symbols. The other unique components which are useful in networking are as listed below Hub- this acts as the connecting point of the devices and is usually placed at the centre of the network. Bridges These are the devices that are incorporated in the network to improve it, though put and operated at a more intelligent level than the hubs. They are always placed between two hubs in the network. Switch This uses a bridging technology to forward traffic between ports. Routers – A router has two basic functions namely path determination using a variety of metrics and forwarding packets from one network to another [Difference between Logical and Physical Network Designs]. Logical networking Before addressing the issue of the type of cable to be used and other related components the logical design network should come first. This involves assessing the needs for network and it serves as the basis of coming up with the appropriate physical infrastructure. This design should address the basic issues such as what the users are doing on the network, and the applications in immediate and distant future. The major issue is the logical addressing used to describe the network itself or the network it connects to. It shows the different IP addresses associated with each part of the network. The class of the network is to be chosen. The logical network can be a simple class C network such as 192. 168. 0. 0 with subnet mask of 255. 255. 255. Such a network will allow a host of up to 254 computers connected to it without the necessity of routing. The future growth and expansion should be put into consideration when designing a logical networking. This is a point which many people tend to overlook only to be faced with problems such as running short of IP Addresses. It is advisable when designing a network to leave room for future expansion of up to 60% of the current size. The budget, the implementation deadline, security requirement for the network and the impact of downtime and network drag on users are the non technical consideration that should be in logical networking [Difference between Logical and Physical Network Designs]. Physical and logical diagrams When networking the network design can be represented both physically and logically. The diagrams are helpful as they act as troubleshooting tool for the IT employee when there is a problem with seeing a device on the network, adding items to the network, understanding what IP addresses are available, adding items on the network and sharing devices across the network. The physical network is more of a pictorial representation as compared to the logical diagram. For example a certain work station with three computers can be represented by one computer symbol in the logical diagram with the three computer addresses. For the physical diagram this station will be represented by the three computer symbols which will sometimes depict the actual positions of the computers in the work station [Logical and Physical Network Designs, 2005]. The physical diagrams are vital in capturing a variety of information in the network. Computers are connected to the hub and a cable line shows how they are connected. The diagram helps in visualizing how much equipment is needed and to show the contractor what the client needs. The administrator creates the physical network diagram to represent the physical layout of the network. The following are typical ways of representing the physical and the logical diagram. Physical network representation Source: http://www. edrawsoft. com/network-drawings. php Logical network diagram Source: http://www. edrawsoft. com/Logical-Network. php The logical network helps one in understanding IP addresses and also used to represent how the network connections are using the upper layer of the OSI. The logical network diagrams are created after the physical network diagrams. References Difference between Logical and Physical Network Designs. Retrieved 20 February 2009 http://www. firewall. cx/ftopict-1176. html Edraw Networks (2009). Logical network diagrams. Retrieved 20 February 2009 http://www. edrawsoft. com/Logical-Network. php Logical and Physical Network Designs (2005), Retrieved 20 February 2009 from http://www. oppapers. com/essays/Logical-Physical-Network-Design/57593

The History of the American Bottom :: American History

Two of the nations largest rivers meet in the American Bottom. The Mississippi and Missouri Rivers served as channels of change to the area, bringing outside influences of many different peoples to an Indian-inhabited land. Like the constant flow of the rivers, there was a constant change in the American Bottom. The progress eventually developed the area into a center of economic activity and gateway to the west, but also excluded native and long-time residents. The Illinois Indians long dominated the American Bottom. They were a unique and special tribe, who were complex politically, religiously, and socially. They were also an independent people until French colonizers came to settle in the area. The French Creoles became the dominant population in the region, effecting trade and implementing French Creole culture in the region. The French would not be the last group trying to develop and profit from the American Bottom. When the United States gained control of the territory, it ch anged even further and eventually Americanized into an U.S. State. The importance of the region increased as the U.S. continued to grow westward. The American Bottoms location between the two great rivers made it the ideal location for a center of economic growth. Prior to the contact period, or the time when the Illinois first came into contact with Europeans, the Illinois were a great and influential tribe. They were a very interesting tribe who had a culture all their own. They were also a very autonomous bunch never having to rely on anyone but themselves for survival. This was all to change with the introduction of European missionaries and traders. The Illinois were dwelling in territory that was in heavy demand by those who wished to exploit these Indians and their land in order to turn over a dollar. The frontier was moving farther west and the Illinois eventually fell into the chaos that followed. War, disease, alcohol, and new ways of life eventually exterminated the Illinois. Although the Illinois were not to make it through the development of the American Bottom, they played a crucial and fascinating role in its history. The land the Illinois lived was not only beautiful but also abundant with resources. The resources in the area amazed the French missionaries and explorers. Father Claude Allois, a Jesuit missionary, describes an interesting spectacle on a journey south. â€Å"The next day, we saw a rock seven or eight feet out of the water and two or three brasses in circumference, named ‘the pitch rock.

Cadbury Report Essay

Introduction Initial corporate governance developments in the UK began in the late 1980s and early 1990s in the wake of corporate scandals. Cadbury Report (1992) defines ‘Corporate Governance as An Act of governing by the board of Directors†. Financial reporting irregularities led to the establishment of the ‘Financial Aspects of Corporate Governance Committee’ led by Sir Adrian Cadbury. The resulting Cadbury Report published in 1992 outlined a number of recommendations around the separation of the role of an organisation’s chief executive and chairman, balanced composition of the board, selection processes for non-executive directors, transparency of financial reporting and the need for good internal controls. The Cadbury Report included what is termed as â€Å"The Code of Best Practice† and its recommendations were incorporated into the Listing Rules of the London Stock Exchange. The Code was initially directed to the board of directors of all listed companies registered in the UK, but it is was not limited to only the listed companies as it also encouraged many other companies as possible to aim at meeting their requirements. Bringing greater clarity to the respective responsibilities of directors, shareholders and auditors will also strengthen trust in the corporate system. Companies whose standards of corporate governance are high are the more likely to gain the confidence of investors and support for the development of their businesses. According to Cadbury Report (1992) By Law, all directors are responsible for the stewardship of the company’s assets. Conclusion and Recommendations The Cadbury Report was followed by three more major reports: Greenbury (1995), Hampel (1998) and Turnbull (1999). The Greenbury Report responded to the concerns about the level of executive pay rises, especially in the privatised utilities. The Hampel Report reviewed the progress of companies in responding to the Cadbury and Greenbury Reports and made some suggestions for improvement. The Turnbull Report addressed the important issue of how to implement best practice systems of internal control. The Report had set a deadline of 30 June 1993 for the beginning of reporting compliance with the Code. By this time 54 out of 66 reporting FTSE100 companies had complied  with the reporting requirement. The percentage of companies with combined CEO and Chairman of the board had declined from 25% to 15%. Within a year the percentage of FTSE350 companies with remuneration and audit committees had doubled and the percentage with nomination committees was rising. The result of all this activiti es is that UK corporate governance ranks as the most open and transparent system of any in the leading industrialised countries. The UK is now ranked ahead of the US in terms of the quality of the environment facing investors on the basis of the governance practices of the firms they are most likely to invest in. Compliance with the Code of best Practise was not enforced and it was not mandatory many firms subjected. Many firms conformed because they did not want to fall victim to the destructive consequences resulting from the disregard of corporate governance. References Cadbury, A. (2002). Corporate Governance and Chairmanship: A Personal View. New York, Oxford University Press Cadbury, A. (1990) .The Company Director, London: Director Books. Cadbury, A. (2000).‘The Corporate Governance Agenda’, Corporate Governance, Vol.8 (1), pp.7-15.

Project Management Plan For The Canadian Arrow Rocket

Introduction The Schedule Management Plan for the assembly of the Canadian Arrow Rocket will be the guide to completion of the project in the time guideline agreed upon in the Project Charter and the Project Management Plan. The Schedule management plan is important to provide the SST team, the Sponsor and the Customer, Scaled Composites with the information on what the projects status will be at a given point in time. The purpose of the schedule management plan will be to outline the duration of each task and allow for a baseline to determine if schedule changes will need to occur to make the deadline. Definite Duration Matrix Schedule Methodology The Project Schedule will be developed by using Microsoft Excel to†¦show more content†¦As the worked packages are completed and signed off by the PM, the schedule will be updated to reflect each work package completion. The resources completing each task will be required to report completion times immediately following the conclusion of the work package. The PM will communicate schedule adherence updates to the Sponsor at every milestone. Duration Estimates and Units of Measure The amount of time that will be required to complete each work package will be estimated by recommending the number of work periods needed to complete individual activities with the estimated resources. All estimated duration times will be reported in whole hours, rounding any partial hours up to the next whole hour. Partial days will be rounded up to the next whole day. The estimated duration times will be reviewed and must fall in line with the scheduled Project completion date. Operational Procedure Process Organizational procedure links provides WBS (Appendix A) as the framework for the management plan, allowing for the consistency with the estimates and resulting schedules. 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