Wireless connections today are ubiquitous and taken for granted; however, there is a complex world at work behind the scenes that relies on highly specific conditions. Whether on a laptop, cell phone, or other wireless handheld device, everyone has experienced the frustration of a faulty wireless signal. For this reason, it is helpful to understand some causes of signal weakness or failure. A brief study of the differences between wired and wireless networks, the basics of multiple access protocols, and increased challenges posed by mobility will offer a basic understanding of the complexities involved in successful wireless data transmission, or what can be described as the "21st century grease of the daily grind." When a user chooses to "unplug" from the wired internet and connect through a virtual wire instead, they introduce a myriad of problems. Some basic challenges result from the differences between a wired and wireless network: decreasing signal...
Signals, which are electromagnetic radiation, attenuate and result in path loss (a weaker transmission) due to interfering matter such as walls or distance in general. Other types of interference include radio sources transmitting at the same frequency, and nearby electromagnetic noise from appliances or motors. The strength of a signal relative to the overall noise interference is the signal-to-noise ratio (SNR). When the SNR is high, the bit error rate (BER) is lowered, resulting in a more reliable transmission. Finally, signal blurring occurs when parts of the electromagnetic wave bounce off objects or the ground. When this happens, the signal is taking paths of many different lengths to reach the receiver, a phenomenon known as multipath propagation. Multipath propagation is complicated further when the objects between sender and receiver are in motion.
Another aspect of the security management area of a network management system is the development of policy-based auditing and alerts by role in the organization (Merilainen, Lemmetyinen, 2011). This is one of the areas of knowledge-enabled security management, specifically in the area of role-based access and advanced auditing and reporting. Fault management is also an area that no single suite of network management systems can completely meet per the ISO standards
Network Management and System Administration The aim of the paper is to establish the difference between a system administrator and a network administrator. The paper is thus divided into three sections. The first section deals with the basic definition and responsibilities of a system administrator; the second does the same for a network administrator and the third compares their responsibilities to clearly identify the differences between the two. System Administrator The maintenance of
). Such security should also preplan strategic responses to attacks associated with the network (Dawkins et al.). A book entitled "Surviving Security: How to Integrate People, Process, and Technology" explains that the rapid expansion networking and networking technologies necessitates greater security needs. The author asserts that parts of the network such as routers, switches and even network printers are vulnerable (Andress). The article further explains that the router or switch contained
competitive, fast-paced business world, a network failure can be disastrous. The pressure placed on network administrators to fix issues immediately is daunting; these important players need all the tools they can get to troubleshoot, prevent, and repair problems. Network administrators must remain vigilant and work constantly to monitor for interface or host failures, detect route flapping or intrusions, perform LAN segment switches or bandwidth adjustments, and monitoring overall performance
Network Design The process of gathering technical requirements for a network design project may differ from one organization to another, but the requirements themselves can be described using many of the concepts discussed in the lecture this week (i.e. Scalability, Availability, Network performance, Security, Manageability, and Affordability). Analyzing technical requirements for the customer is important in helping one best fulfill the customer's expectations. The various objectives that need to be fulfilled involve
Network Design Proposal Network Requirements ABC School Stats/User Counts Having a current strength of approximately 845 students, ABC School provides education from Pre-Kindergarten to the 12th Grade. According to the requirements of The New York School District, 250 Curriculum computers along with 75 Administration computers are to be installed. The requirements for the wiring per room of layer 1 are that it should adjust a total of 25 computers, 24 of which will
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