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Unformatted text preview: b. Coaxial Cable- wire that consists of a center wire wrapped in insulation, then a grounded shield of braided wire. The shield minimizes frequency interference, but because of high attenuation, more repeaters are needed. c. Fiber-Optic – Glass or plastic coated cable that transmits data in the form of light. Requires less repeaters because of less attenuation. 2. Explain the concept of unguided media. This type of media sends/carries signals through the air and can be received by anyone with the appropriate device. The first type of travel is ground propagation, where low frequency signals travel low and parallel to the ground and can lose power depending on how far away the receiver is. Sky propagation is where high frequency signals are sent towards the dense atmosphere and are reflected back to us to be received. In line of sight propagation, the highest-frequencied signals are sent back and forth through antennas in a straight line....
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This note was uploaded on 01/19/2012 for the course COMPUTER S 100 taught by Professor Brown during the Spring '11 term at Strayer.
- Spring '11