This assignment is designed to help you develop skills and strengthen your understanding of data communications. Answer the questions as if they are a professional presentation to a client. Thus justify what you say in terms of what will work well for the client.
Question: Physical Layer
Part A We presented four impairments to physical transmission of signals attenuation, noise, attenuation distortion, and delay distortion. How will these affect the guided media of copper wires and optical bre cable, and wireless media? Suggest some techniques that are used at the physical layer to counteract these effects (that is ignore techniques like error detection and correction used at higher layers). Part B Consider again the above three media, but in this case how does security affect these media and again what physical measures can be taken to secure these media.
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