NT1210 Labs 3.1-3.4

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NT1210
Labs 3.1 to 3.4

3.1.1
What would happen if wireless devices were not governed by the Wi-Fi Alliance and each vendor had its own standards and protocols? What impact would this have on your personal life or business communications?
Personal information and business will slow down due to each vendor having its own standards/protocols. It will also be more vulnerable to attacks and make accessing more difficult.
3.1.2
Give another example of a model that is used to visualize something that is difficult to observe or perceive. How does the model make it easier to understand?
Another way of displaying information for easier understanding is to use a flow chart. A flow chart can be used as a step by step guide.
3.1.3
Based on what you already know about networks, what are the different layers you think would be necessary for communication to be mapped to a model? Consider direct connections between host devices and connections that require other routing equipment, such as a hub, switch, or router.
1. Data link
2. Physical
3. Application
4. Network
5. Transport
3.1.4
The granularity of the reference model will often determine the usefulness of the model. What will happen if a model is too general? What will happen if a model is too granular (focused on individual detail)?
If the data is too detailed, it may overlap with other information. However if the data is too general, then there may be crucial information missing.
3.1 Review
1. Why would a three-layer model of communication that has the layers physical, network, and application be insufficient to adequately describe network communication?
The model would be insufficient because it would not have the ability to transport data to any other network.
2. What is the history of the OSI reference model? How did it come about and why was it created? Use your textbook and internet research to support your answer.
OSI was created in the late 1970s. It was created to define a unifying

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