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Science Meets Real Life

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Wired and Wireless Communication Channels
Kaplan University

Assignment: Wired and Wireless Communication Channels

Rudy Chavez
February 19, 2013
Course: IT 331 Technology Infrastructure
Instructor: Prof. James

1. You have been asked to design a LAN with operation over a distance of about 100m. Compare and contrast twisted pair cable, coaxial cable, fiber-optics, and wireless for this application. You should create a table or flow chart which would facilitate choosing between these options depending on circumstances. The table or flow chart should be submitted as part of your document. You may not submit a separate file.
The choice of media to be used for a network that spans 100 meters depends upon several factors and requirements that include cost, ease of installation, environmental factors such as the need to trench and EMI or Electromagnetic Interference, performance and attenuation, security, and network fault tolerance. Regarding each type of media (includes the supporting network devices), the least expensive would be an unshielded twisted pair in the form of CAT 5 or 6, which is also generally the least expensive to install (flexible cable and lower cost network equipment), but not resistant to environmental factors such as EMI (unless the more expensive shielded variety is used). A twisted pair does support higher network speeds, up to 1000 Mbps over the 100 meter distance. Coaxial cable would be more expensive to install than twisted pair due to higher cable cost and installation difficulty (the cable is very stiff), but it does have a built in shield for EMI protection with less attenuation over longer distances (up to 500 meters with RG6). Coaxial cable only supports network speeds up to 10 Mbps and only supports bus topology where the entire network fails if a single break occurs in the network or a host fails. Fiber optics cable has

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