IT 548 Telecommunications & Networking Local Area Networks Hood College Dept. of Computer Science Spring 2013 Layer 2: The Datalink Layer • • 2 Datalink layer provides a reliable communications link between devices. Breaks a data stream into chunks called frames‚ or cells. Three key functions: • error detection • error correction • flow control • • In LANs DL can be broken down into two sub-layers: • media access control (MAC) • logical link control (LLC). • flow and
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concentration of these in and near the urban areas causes severe pollution to the surroundings. The largest sources of human-created air pollution are energy generation‚ transportation‚ and industries that use a great deal of energy sources. Depending on their source and interactions with other components of the air‚ they can have different chemical compositions and health impacts. Since these pollutants are generally concentrated in and around urban areas‚ the outdoor urban pollution levels are far higher
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Vocational Area Report Introduction The following report is a formal structured report based on investigating the job opportunities available in Radio and Journalism. The aim of the report is to: · · · Practice writing a formal structured report. Understand how to structure research in an easy and accessible way. Fulfil a module for my FETAC level 5 Radio and Journalism course. Contents Page · Cover Page: Page One · Introduction: Page Two · Contents: Page Three · Chapter One: Page Four
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sector. Furthermore‚ the pattern of distribution of socio-economic infrastructure exhibits an urban rather than a rural location bias which further helps to increase rural poverty. The absence of these amenities constitute push factors facilitating the migration of rural dwellers into urban centers‚ resulting to population explosion in most urban cities in Nigeria. Consequently the existing urban services are overstrained which often times lead to total collapse. A large proportion of the population
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and deters economic growth and development. Violence inhibits the recruitment and retention of a highly skilled workforce and forces society to expend a disproportionate amount of its national budget on violence-related health care‚ security‚ and crime fighting (3). Jamaica is no exception‚ spending an extraordinarily high percentage of its gross domestic product on violence-related issues and struggling with reduced human capital‚ productivity‚ and quality of life (2‚ 7‚ 8). Moreover‚ the high cost
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A RESEARCH MONOGRAPH ON CYBER CRIME AND THE CONTRIBUTIONS OF SOCIAL SITES TO CYBERCRIMES Abstract Facebook has become a force to reckon with in the field of social networking. It has been ranked as the number one social networking site with a membership of over five hundred million. It has earned trust from many people who have in turn exposed their information without thinking twice into which hands it might fall. Despite the positive contribution and impact that Facebook has provided‚ it
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A Crime by Any Other Name… The main issue in Reiman and Leighton’s The Rich get Richer and the poor get prison is how crime is labeled; “A Crime by Any Other Name” to be exact. How “crime” is labeled comes depends on the nature of the crimes as legislatures and police officers must use discretion when deciding what constitutes as a crime. According to Reiman and Leighton‚ crime is used to label “the dangerous actions of the poor” (5). This is the direct result of the reality of crime that is created
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000234333 EFT4: Math: Task 5: Surface Area of Cubes Introducing Surface Area For a fifth or sixth grade class to understand the concept surface area in relation to a cube they need to understand what a cube is first. They will learn that a cube is a special type of rectangular solid. The length‚ width‚ and height of a cube are exactly the same. After explaining what a cube is they will need to understand what it means to find the surface area. The surface area is not the same as finding the volume
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Juvenile Crime Introduction Every year‚ millions of juveniles are involved in criminal activities. According to statistics‚ as of 1999‚ the arrest rate for juvenile crime has dropped from its peak in the mid-1990 ’s. Statistics about juvenile crime have shown a steady increase of juvenile arrests from 1987 to 1994. Although overall crime rates have decreased since 1994‚ they are still above what they were in 1980. The following paragraphs and charts show the crime rates of specific crimes committed
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|Subject: Surface area of a sphere | A connection which could be illustrated‚ and could be understood by students who know the perimeter of a circle‚ runs as follows: Put the sphere of radius R inside a cylinder‚ with the cylinder just touching the equator‚ and cut off at the height of the top and bottom of the sphere. (A cutaway view is in the diagram.) [pic] What is the area of the curved part of the
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