Computer technology Essay Example | Topics and Well Written Essays - 1500 words

Computer technology - Essay Example Computer systems consist of both software and hardware. The hardware components are tangible components of the system: main memory, CPU, peripherals such as monitor, video display etc (Gookin 2006). Software part is the set of instructions that define what the actions of the computer hardware (Alagar and Peryasammy 2011). Typically a computer requires both the system software Minimum user requirements Fred, Barry and Jane need a Single PC for their gaming needs. Frankly, there are no many options for a PC with the minimum requirements they desire that can go for the price in their budget estimate of 350. For a gaming PC no existing integrated graphics acceleration cards can handle the processing requirements of the game. In this case a graphics processor that is dedicated will still be required. OS: Windows Vista or Windows 7 Processor: Core 2 Duo 2.4 GHz or Althon X2 2.7 GHz RAM: 2GB Graphic card: DirectX 10 or 11 compatible Nvidia or AMD ATI card, ATI Radeon 3870 or higher, Nvidia GeForce 8800 GT or higher. Graphics card memory: 512 MB Sound card: DirectX compatible sound card Hard drive: 15 GB for disc version or 10 GB for digital version Fig. 1 Complete desktop computer The retailer has the option of making a choice between several brands, manufacturers of computers; Dell, Hewlett Packard and IBM. In my assessment I would recommend a machine that is high performing with the functionality that can well fit the gaming requirements. Since the budget constraints the selections, the best option is to go for the components that are most important in supporting gaming requirements. The computer features most essential for a gaming machine are; processor, graphics card, internal memory and hard disk capacity. Compromising on other desired features such as sound will not harm the game and the advantage will be the cost cuts. Justification Quad-Core Processor Though lesser processors such as dual-core are cheaper and within the budget, the ability of a quad core to s upport a larger number of tasks at the same time is a must for serious gaming. This is a good processor will help the computers to run effectively. The processor is the brain of the computer and controls most of the work done by the PC. For gaming requirements, multimedia multitasking, for example video recording while browsing will give a more pleasant experience. Processors are generally defined by their speed - in megahertz (MHz) or in gigahertz (GHz) - and it relates to the number of operations they can perform per second. The higher the value, the faster the PC will perform and the more expensive it generally is. I will recommend the Quad-Core AMD Opteronâ„ ¢ Processor with Direct Connect Architecture are designed to deliver industry leading power efficiency, optimal virtualization, outstanding performance, and low TCO - all within a consistent footprint and thermal envelopes. Fig. 2 Central processing unit AMD Phenomâ„ ¢ X4 Quad-Core Processors is a true quad-core perfor mance for the way gaming multi-task today, and for the next-generation applications that will be needed in the near future. Stable commercial AMD Phenomâ„ ¢ X4 quad-core processors offer industry-leading platform stability and longevity, investment protection, and the exceptional performance you expect from AMD. In addition, the processor comes with unique features for energy efficiency ‘AMD’ (2011). Random Access Memory (RAM) The computers will need about 4 gigabytes of memory so that they can run

Near field communication (NFC) and its validity as a secure system of Essay

Near field communication (NFC) and its validity as a secure system of data transfer - Essay Example Being a non-contact technology, the NFC is highly advantageous as it does not require establishment of physical electrical contact. As such, in applications such as those requiring the use of cards, there is no need of inserting cards that use NFC into the reader, thus avoiding any problems that may be associated with poor contact. It is important to note that NFC uses inductive-coupling at a license free frequency allocation in the radio spectrum HF portion(Ahson & Ilyas, 2012, p. 33). NFC has a set of standards that govern it thus allowing for connectivity between NFC devices from different manufacturers. Besides creating the contactless environment for NFC interactions, the standards also determine the data transfer rates and the data formats. An NFC connection is simply achieved by bringing two electronic devices together within a close range to allow them to communicate. This eradicates the problem with identification and minimizes the issue with security, allowing for easier exchange of information. The NFC can be used for a variety of applications including in: mobile phones to transfer files from one handset to another; personal computers to link up networks for data transmission; point-of sale machines; turnstiles; parking meters; vending machines; and in other applications in the house or office, such as opening and closing of the garage doors(Finkenzeller, 2010, p. 80). The NFC connections could also be applied in the configuration of the connection between two devices that have wireless connections. Bringing the devices together allows for the initiation of the NFC connection which in turn initiates the set-up procedure. Other long-range wireless devices including the Bluetooth could be configured through communication with the NFC interface(Coskun, et al., 2011). NFC are vulnerable to man-in-the-middle (MITM) attackswhich involve attackers succeeding in interception of the communication