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Preparation for Performance Management 100 Mbps Lab Introduction As was stated in Performance Management 10Mbps Part I of this lab, performance...

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Preparation for Performance Management 100 Mbps Lab Introduction As was stated in Performance Management 10Mbps Part I of this lab, performance management is one of the five network management categories defined by the ISO. In Part I, you examined delay, throughput, and efficiency for a particular network design. In this lab, you will continue to examine these categories of performance management when key characteristics of a given network are varied. Explanation and Background In this lab, you will use the Ethernet LAN network you built in the Performance Management Lab Part I; however, the link rate you will use for this network will be 10 times the bandwidth of the one used in Part I. You will then analyze the performance of the network by measuring the end-to-end delay, throughput, and network efficiency when the frame sizes of network traffic are varied, as they were in Part I, from a small size (256 bytes) to a medium size (512 bytes) and then to a large size (1,024 bytes) for a fixed network link rate. However, the network will now use a link rate of 100 Mbps (high bandwidth) as opposed to the link rate that was used in Part I, which was 10 Mbps (low bandwidth). Motivation In the Performance Management Lab Part I, you analyzed the performance of a shared Ethernet LAN network that was using a low bandwidth (10 Mbps). You examined delay, throughput, and efficiency of the network as it relates to frame size. Serialization delay had a significant impact because of the low bandwidth that was used. As was pointed out in Part I of this lab, serialization delay is the time it takes for a unit of data to be serialized for transmission on a channel. Serialization delay and frame size are directly proportional. This means that as frame size increases for a fixed channel capacity (bandwidth), serialization delay will increase. You should have learned from Part I of this lab that when the network bandwidth is low, as was the case for Part I, serialization delay can increase greatly as the frame size increases. However, for networks that have a very large bandwidth and reasonable frame sizes, serialization delay will usually not have a significant impact, especially if
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2 | P a g e the traffic on the network is not real-time data traffic. This lab will reexamine delay, throughput, and efficiency for the same network design, and the frame sizes used will be the same as before (256 bytes, 512 bytes, and 1,024 bytes). However, for this lab, the bandwidth will be increased from a 10 Mbps link rate to a 100 Mbps link rate. You will then analyze all the same attributes that you did in the Performance Management Lab Part I to see what affect, if any, an increase in bandwidth has on network performance for the network under analysis. You will then have to determine which frame size is best for the network design when a high bandwidth is used. Modus Operandi Execute the steps as shown. In some instances, you may need to refer to the OpNet documentation to obtain additional information you need to execute a step, solve a problem, or build the simulation. In other instances, you may need to do some research in your text or in online resources to understand and answer a question. When you encounter the  3. symbol, you will be required to answer a question in the lab report. In the template for the lab report, answer the questions in the body of the text. In this example, you would answer question number 3. Do the same each time you encounter this symbol followed by a number. There may be additional questions at the end of the lab. When completed, hand in the answers document according to your instructor’s guiding. Be sure you retain an electronic copy. The symbol denotes a note or a sidebar that you should pay attention to.
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