Networks classification Essay Example for Free

Networks classification Essay In the world of computers, networking is the practice of linking two or more computing devices together for the purpose of sharing data. Networks are built with a mix of computer hardware and computer software. Networking software applications are available to manage and monitor networks of all sizes, from the smallest home networks to the largest enterprise networks. Networks classification 1. Local Area Networks (LANs): These connect over a relatively small geographical are, typically connecting computers within a single office or building. In most cases they connect to a common electronic connection- commonly known as a network backbone. LANs can connect to other networks either directly or through a WAN or MAN. Most LANs connect workstations and personal computers. 2. Metropolitan Area Networks (MANs): These connect networks around a town or city. Short for Metropolitan Area Network, a data network designed for a town or city. In terms of geographic breadth, MANs are larger than local-area networks (LANs), but smaller than wide-area networks (WANs). An example of a Man is the Eastman (Edinburgh and Stirling MAN) network that connects universities and colleges. 3. Wide Area Networks (WANs) : These connect networks over a large geographical area, such as between different buildings, towns or even countries. 4. A campus area network (CAN) is a computer network made up of an interconnection of LANs within a limited geographical area. In the case of a university campus-based campus network, the network is likely to link a variety of campus buildings including, for example, academic colleges or departments, the university library, and student residence halls. 5. A personal area network (PAN) is a computer network used for communication among computer and different information technological devices close to one person. Some examples of devices that are used in a PAN are personal computers, printers, fax machines, telephones, PDAs, scanners, and even video game consoles. A PAN may include wired and wireless devices. The reach of a PAN typically extends to 10 meters Topology Network topology is the arrangement of the various elements (links, nodes, etc.) of a computer or biological network. Essentially, it is the topological structure of a network, and may be depicted physically or logically. There are two basic categories of network topologies: 1. Physical topology refers to the placement of the networks various components, including device location and cable installation, 2. logical topology shows how data flows within a network, regardless of its physical design. The study of network topology recognizes eight basic topologies: †¢ Point-to-point = the simplest topology is a permanent link between two endpoints. †¢ Bus = A linear bus topology consists of a main run of cable with a terminator at each end (See fig. 1). All nodes (file server, workstations, and peripherals) are connected to the linear cable. Advantages of a Linear Bus Topology †¢ Easy to connect a computer or peripheral to a linear bus. †¢ Requires less cable length than a star topology. Disadvantages of a Linear Bus Topology †¢ Entire network shuts down if there is a break in the main cable. †¢ Terminators are required at both ends of the backbone cable. †¢ Difficult to identify the problem if the entire network shuts down. †¢ Not meant to be used as a stand-alone solution in a large building. †¢ Star = A star topology is designed with each node (file server, workstations, and peripherals) connected directly to a central network hub, switch, or concentrator (See fig. 2). Data on a star network passes through the hub, switch, or concentrator before continuing to its destination. The hub, switch, or concentrator manages and controls all functions of the network. It also acts as a repeater for the data flow. This configuration is common with twisted pair cable; however, it can also be used with coaxial cable or fiber optic cable. Advantages of a Star Topology †¢ Easy to install and wire. †¢ No disruptions to the network when connecting or removing devices. †¢ Easy to detect faults and to remove parts. Disadvantages of a Star Topology †¢ Requires more cable length than a linear topology. †¢ If the hub, switch, or concentrator fails, nodes attached are disabled. †¢ More expensive than linear bus topologies because of the cost of the hubs, etc. †¢ Ring = A network topology that is set up in a circular fashion in which data travels around the ring in one direction and each device on the right acts as a repeater to keep the signal strong as it travels. Each device incorporates a receiver for the incoming signal and a transmitter to send the data on to the next device in the ring. The network is dependent on the ability of the signal to travel around the ring. When a device sends data, it must travel through each device on the ring until it reaches its destination. Every node is a critical link. †¢ Mesh = The value of fully meshed networks is proportional to the exponent of the number of subscribers, assuming that communicating groups of any two endpoints, up to and including all the endpoints Advantages of Mesh topology 1) Data can be transmitted from different devices simultaneously. This topology can withstand high traffic. 2) Even if one of the components fails there is always an alternative present. So data transfer doesn’t get affected. 3) Expansion and modification in topology can be done without disrupting other nodes. Disadvantages of Mesh topology 1) There are high chances of redundancy in many of the network connections. 2) Overall cost of this network is way too high as compared to other network topologies. 3) Set-up and maintenance of this topology is very difficult. Even administration of the network is tough. †¢ Tree = A tree topology combines characteristics of linear bus and star topologies. It consists of groups of star-configured workstations connected to a linear bus backbone cable (See fig. 3). Tree topologies allow for the expansion of an existing network, and enable schools to configure a network to meet their needs. Advantages of a Tree Topology †¢ Point-to-point wiring for individual segments. †¢ Supported by several hardware and software venders. Disadvantages of a Tree Topology †¢ Overall length of each segment is limited by the type of cabling used. †¢ If the backbone line breaks, the entire segment goes down. †¢ More difficult to configure and wire than other topologies. †¢ Hybrid = Hybrid networks use a combination of any two or more topologies in such a way that the resulting network does not exhibit one of the standard topologies (e.g., bus, star, ring, etc.). For example a tree network connected to a tree network is still a tree network topology. A hybrid topology is always produced when two different basic network topologies are connected. Two common examples for Hybrid network are: star, ring network and star bus network †¢ Daisy chain = Except for star-based networks, the easiest way to add more computers into a network is by daisy-chaining, or connecting each computer in series to the next. If a message is intended for a computer partway down the line, each system bounces it along in sequence until it reaches the destinati on. A daisy-chained network can take two basic forms: linear and ring. o The straight-through cables are used when connecting Data Terminating Equipment (DTE) to Data Communications Equipment (DCE), such as computers and routers to modems (gateways) or hubs (Ethernet Switches). The cross-over cables are used when connecting DTE to DTE, or DCE to DCE equipment; such as computer to computer, computer to router; or gateway to hub connections. The DTE equipment terminates the signal, while DCE equipment do not. †¢ RJ stands for Registered Jacks. These are used in telephone and data jack wiring registered with FCC. RJ-11 is a 6-position, 4-conductor jack used in telephone wiring, and RJ-45 is a 8-position, 8-conductor jack used in 10BaseT and 100BaseT Ethernet wiring. †¢ UTP stands for Unshielded Twisted Pair. It is the cabling system with one or more pairs of twisted insulated copper wires contained in a single sheath. It is the most widely used cabling system in telecommunications and data communications environment today.

E-commerce Essay -- Business and Management Studies

E-commerce Explain what is meant by the term ‘E-commerce’. It is the conducting of business communication and transactions over networks and through computers. As most restrictively defined, electronic commerce is the buying and selling of goods and services, and the transfer of funds, through digital communications. However EC also includes all inter-company and intra-company functions (such as marketing, finance, manufacturing, selling, and negotiation) that enable commerce and use electronic mail, EDI, file transfer, fax, video conferencing, workflow, or interaction with a remote computer. Electronic commerce also includes buying and selling over the Web, electronic funds transfer, smart cards, digital cash (e.g. Mondex), and all other ways of doing business over digital networks. Assess the advantages and disadvantages of E- Commerce information systems. Both the consumer and the supplier of a product can benefit from when using Electronic Commerce many obvious advantages. The consumer can browse through a whole shopping mall from the comfort of his or her own home, and products can be purchased and delivered right to their home. E-Commerce removes the hassle of crowds and line-ups from the consumer's routine. The supplier has the advantage of keeping their store open twenty four hours a day, seven days a week - without having to hire the staff to maintain it which saves a lot of money which means they can focus on better prices for their products and greater profits. The Internet opens up the customer base widely, allowing many customers the opportunity to view their product. First, businesses can communicate with customers easily. The business can receive and send e-mails from/to customers. This allows customers to quickly get in contact with the business. This can also be done to suppliers is well. This means that the business will forge closer relationships with customers and suppliers. In addition, e-commerce allows customers to look at the businesses products from their home. This means that customers will be able to look or buy the product at any time rather than only when they go shopping. Also with the business being on the internet it will mean that that the business will be able to aim their will be easy to access and that more people can see their product. Moreover, it is said that trad... ... First, careful design of documentation will aid the prevention of unintentional errors in recording and processing. Besides, the accurate processing of a transaction document requires those responsible to carry out the organisation’s procedures correctly. These should be specified in a procedures manual. Furthermore, separation of functions is aimed at preventing fraud. If a single member of staff were to be in charge of carrying out all the procedures connected with a transaction then it would be possible, and might be tempting, for that person to create fraudulent transactions. When these functions are separated and placed in the hands of different individuals, fraud may still be tempting but will be less possible. A business relies on its personnel. So, personnel must be selected and trained effectively to ensure that they are competent to carry out the tasks required of them. Also, physical controls may be used as a preventive measure; avoiding illegal loss of assets such as cash is to exclude staff from unnecessary access to these assets. A range of physical controls may be used to prevent access – locks, safes, and stout doors are obvious methods.

Organizational Forms Essay

There are several types of organizational forms that a business can choose from. Each form presents pros and cons that may or may not be suitable for a particular business. This report will review characteristics such as: liability, income taxes, longevity or continuity, control, profit retention, location, convenience and burden for each business form and how they differentiate from the different types of organization forms. Sole proprietorship A sole proprietorship is the most common business form. A business is a sole proprietorship if it is not incorporated, meaning that a separate legal entity is not created for it. An advantage of forming a sole proprietorship is that it is the easiest and least expensive business form. a.Liability: A sole proprietorship does not excuse the owner from personal liability. If the business fails, the owner is responsible to the creditors and may lose personal assets. b.Income Taxes: The profits and losses of the business go through the owners’ personal tax return. This can positively or negatively affect the owner depending on what the profit and losses of the business are and what other sources of income the owner may have. c.Longevity or continuity: If the owner dies the company cannot continue on. If the owner decides to leave the company, then the company will also cease to exist. d.Control: In a sole proprietorship the owner has full control of the business. e.Profit retention: The owner receives all profits in a sole proprietorship. f.Location: When a business is a sole proprietorship the owner can move the business to any location. The only fee may be if changing states or county and the business is operating under a trade name, then the owner will have to pay the relatively small fee to operate as a DBA (â€Å"Doing Business As†). g.Convenience or burden: There are not any extra burdens when operating as a sole proprietorship. The owner does not have to meet any special reporting or regulatory requirements. There are not any special tax requirements or restrictions. The business profit and losses are filed with the owner’s regular tax return. General partnership A general partnership is between two or more owners of a business that is not incorporated. a.Liability: Each partner is held personally liable for the debts of the business regard less of fault. b.Income Taxes: Taxes are reported on each partner’s personal income tax return, so any profits made by the company are treated separately from the individuals’ income, but included. c.Longevity or continuity of the organization: A general partnership lacks continuity. If a partner leaves and his or her shares cannot be bought by the remaining partner, then the business must close. If a partner dies, their heir can be paid for the value of their share of partnership, but cannot continue with business. d.Control: In a partnership control is equal between all the partners. This can be difficult when a company has many partners or partners that don’t know each other. If a change is made without consulting with the other partners that can cause friction between the partners, so it may be best to include all partners in all decisions. e.Profit Retention: Profit is distributed equally between all partners and so is any loss. f.Location: A general partnership is fairly easy to setup and move. There are not any special forms that need to be filed with the state or county to form a general partnership. There only has to be at least two people to make up the partnership. g.Convenience or burden: Since there are not any special filings that need to be done for a general partnership, it is very convenient. Limited Partnership A limited partnership is partnership that does not hold the partners personally liable for the business debts. a.Liability: Limited partners are not held personally liable for the business debts. b.Income Taxes: All profits and losses are passed through each partners’ individual income tax return. The company does not pay taxes. c.Longevity or Continuity: Limited partners can freely enter and leave the company. The company can continue if a limited partner leaves. d.Control: In a limited partnership there are limited partners and general partners. The general partners manage the partnership. e.Profit Retention: Profits are distributed to the partners based on their contribution and pass through to the partners, who in turn report the profits on their individual tax return and pay taxes at their individual rate. f.Location: When a LLP is formed or if it moves, then it must comply with state filing requirements. A LLP must file a Certificate of Limited Partnership with the appropriate state agency. g.Convenience or burden: A LLP can be convenient because it attract capital easily, it offers limited liability to partners, easy transferability of partnership, and pass-through taxation. C-corporation A C- corporation or a â€Å"privately held corporation† is a company whose stock is not publicly traded. a.Liability: A business owner is not personally liable for the company debts and is protected from lawsuits and judgments against the business. b.Income Taxes: C-corporations are double taxed. The IRS taxes the company profits and tax any dividends paid to shareholders. c.Longevity or Continuity: Even if the owner leaves or dies, the C-corporation being a separate entity can continue to go on. d.Control: Management is shared between the shareholders. e.Profit Retention: Profits are usually kept within the company and not distributed to shareholders. f.Location: A C-corporation must follow state filing requirements in each state that it wishes to setup in. This can be very costly. g.Convenience or burden: An advantage of a C-Corporation is that it provides the best protection for the owner against the company debts. A disadvantage is that it can be costly to establish. S-corporation S-corporations are a separate entity from the owner. It offers the owner limited liability, but the tax structure benefit of a partnership. a.Liability: The owner an S-corporation is not held personally liable for any debts or judgments incurred by the company. b.Income Taxes: In an S-corporation, the profits and losses of the company are passed through to the owners and shareholders and reported on their personal income tax returns and taxed at their individual rates. The company itself is not taxed. c.Longevity or continuity: Like a C-corporation an S-corporation can continue on, if the owner leaves or dies. d.Control: A board of directors manages the company through officers. e.Profit Retention: Generally in an S-corporation the profits are passed on to the shareholders. f.Location: An S-corporation must follow state filing requirements in any state that it wishes to setup in. g.Convenience or burden: An S-corporation can be convenient, because it provides the owner and shareholders protection from company debt and they save on paying taxes on profit, but it can be costly in setting up. Limited Liability Company A Limited Liability Company is similar to an S-corporation in that it offers the limited liability of a corporation, but the tax structure benefit of a partnership. a.Liability: Owners and shareholders are protected from personal liability for the business debts and judgments. b.Income Taxes: Profits and losses are passed through to the shareholders and filed on their individual income tax returns. c.Longevity and continuity: An LLC can continue if a member leaves, but the LLC must pay the member the value of their interest. d.Control: An LLC is managed by its’ members. e.Profit Retention: Profits are passed on to the members. f.Location: A LLC must follow state filing requirements for any state it wishes to setup in. g.Convenience or burden: LLC offer a very flexible structure. It also has no limitations on the number and kind of owners. It can be very expensive to form and because it is so new, it can be more complex. Bibliography Book: Beatty, J. & Samuelson, S. (2007). Business Law and the Legal Environment: Standard Edition, 4e. Mason, OH: Rob Dewey Web site: Perez, W. (2009). Protect Your Business Profits by Incorporating. About.com. Retrieved March 20, 2009, from http://taxes.about.com/od/taxplanning/a/incorporating.htm Corey Pierce, J. (2002-2004). Business Startup: Where to Begin & How to Grow. Businessfinance.com. Retrieved March 22, 2009, from http://www.businessfinance.com/books/StartABusiness/StartABusinessWorkbookTOC.htm PART B interoffice memorandum to:Owner subject: Business organization date:8/10/2013 There are many different types of business forms. After reviewing them all, I have come to the conclusion that an S corporation will be the most beneficial to you company. An S-corporation is a separate legal entity and protects the owner and shareholders from personal liability and offers benefits with its tax structure. This memo will address issues that are important to you and the advantages provided to you by forming an S-corporation. You expressed concern regarding your personal liability and whether or not if the company was to be sued- you did not want to possibly lose all of your personal assets. With an S-corporation you are protected from losing your personal assets if a company is sued for negligence by an employee or subcontractor. If the company were to default on debts, your personal assets are protected from creditors. Funding will also be fairly easy to obtain with an S-corporation. With an S-corporation, you will be able to sell stock in the company to increase capital assets to help with you expanding. You will be able to sell as much or as little of your companies’ stock as you wish, once a stock value is determined. An advantage to selling you company’s stock beside the increase in capital is that you are also able to retain control of the company when issuing stock. The profit that your company earns will be distributed to the shareholders, but with an S-corporation, shareholders are only allocated the profit and losses equal to the amount of their investment. The profits and losses are passed through to each shareholder and filed on their individual income tax returns. The company itself is not taxed. Also, with an S-corporation, if you were to pass away, the company would have continuity. The company would not have to dissolve and you. The stock that you own in the company can be transferred to an heir or transferred by the sale of all or a portion of the stock. Based on these findings, I recommend you to form an S-corporation for your company.

Essay On Complex Intervention In Mental Health Care

A Focus on Complex Interventions in Mental Health Care: Individualized Care and Recovery Today, people face a lot of mental health problems such as stress, depression, anxiety, panic attacks, and schizophreniabecause of the excessive demands and risks in life. People with mental health problems, tend to exhibit some emotional variations such as changes in mood, chronic anxiety, and erratic thinking (Allen, Marmot, WHO, FundacÃŒ §aÃŒÆ'oCalousteGulbenkian,2014). According to WHO (2003; and Allen, Marmot, WHO, FundacÃŒ §aÃŒÆ'oCalousteGulbenkian, 2014), often, mental health problems result from the combination of certain factors such as childhood neglect and abuse, stigma and discrimination, social loneliness and isolation, long-term stress, the death†¦show more content†¦According to Patel, Flisher, Hetrick, and McGorry(2007), treatment of for mental disorders has not been easy even in the developed country considering the limited professionals. Even when one accesses treatment, the interaction between patients and caregivers can sometimes be strained bythe absence of mental health professionals, the non-specialists struggle before they can offer quality mental-health care (Patel, Flisher, Hetrick,McGorry, 2007). According to WHO (2008), there have been increased cases associated with lack of treatment especially with persons with alcohol and substance abuse. Another challenge to access mental health treatement is the concern that the information about the treatemnent will be public (Tanielian, Jaycox, Jaycox, Rand Corporation, 2008). Thus, for the interventions to be effective, there is the need to ensure that the right treatment and recovery model is applied. According to Jacob (2015), the concept of individualized recovery process is about being in control of one’s life. One reconstructs or recovers a valued sense of purpose and identity. Mental health practitioners such recommend for Cognitive Behavioral Therapy (CBT) although it might not be available. The cognitive model is focused on the development of individual’s coping mechanism that change any unhelpful cognitiveShow MoreRelatedMaternity Care Of Women With Mental Health Issues1500 Words   |  6 PagesWithin this essay maternity care of women with mental health issues will be analysed and discussed in conjunction with contemporary society and health care provision. Raynor and Oates (2014) portray pregnancy, childbirth and the puerperium as a significant but normal life-changing event that can transform lives of women and lead to intensified levels of anxiety, emotion, self-doubt, stress and strain due to the responsibilities of parenthood and changes this presents to family dynamics. Mental healthRead MoreBiomedical And Social Model Of Health1712 Words   |  7 PagesThis essay will focus on the biomedical and social model of health. 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