List the seven layers of the OSI model.Write a paper detailing the advantages and disadvantages of the three main topologies: ring, bus, and star.

List the seven layers of the OSI model.Write a paper detailing the advantages and disadvantages of the three main topologies: ring, bus, and star.
Unit I Assignment

Describe the OSI Reference Model
List the seven layers of the OSI model. Number your assignment from 7-1. Write the name of the layer next to the number to which it corresponds. Describe the function of each layer, purpose of each layer, and what hardware resides at each layer with at least one paragraph for each layer. Note that only the first four layers of the OSI model have hardware associated with them.
Example: · Layer 7: Application Layer – Discuss the function of, the purpose of, and what hardware, if any, resides at this layer. · Layer 6.
· Layer 5. ·
Layer 4. ·
Layer 3. ·
Layer 2. ·
Layer 1: Physical layer – Discuss the function of, the purpose of, and what hardware, if any, resides at this layer.
This assignment must contain an introduction, a conclusion, and be a minimum of two pages in length.

Unit II Assignment

Network Topologies
Write a paper detailing the advantages and disadvantages of the three main topologies: ring, bus, and star.
Include the following in your paper:
1. Write a paragraph about each topology. 2. List the advantages and disadvantages of the type of topology and how it can be applied to the realm of data communication. 3. List the wiring types associated with the topology, and describe how they can be used. 4. Post a diagram of each topology. (use any basic drawing application).

Do this for each of the three types of topologies: Ring, Bus, and Star. Your response should be a minimum two-page paper with tables, graphs, and appendices.

Unit III Essay

Describe what types of applications that might use frequency division multiplexing (FDM), time division multiplexing, and dense wavelength division multiplexing. How do the four components of the physical layer of the open systems interconnection (OSI) model relate to FDM?

Your paper should contain a minimum of 300 words and be formatted using APA style. Use your own words, and include citations and references as needed to avoid plagiarism.

Unit VI Essay
As a consultant, you have been hired by ICU Hospital to develop a system in which the main hospital and an outpatient clinic can receive three-dimensional, high-resolution, and color ultrasound images. The doctors at the main hospital can review the images in real time and communicate via phone line to the ultrasound technician in the clinic and patient.
Describe what type of telecommunication service will be needed, and list any particular details about the service. Provide a network LAN drawing between the main hospital and outpatient clinic. (The outpatient clinic is a separate building from the main building.)

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