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12 Cards in this Set
- Front
- Back
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Why are Cat 4 and Cat 5 better than Cat 1-3 wires?
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Cat 4 & 5 have more twists per inch and higher quality copper, thus less noise
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What was special about Cat 5e?
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It specified four pairs of wires, connectors, patch cords and combinations
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What is the speed and the range of Cat 6 wire?
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speeds up to 250 MHz and distance of 100 m
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What is the speed of Cat 7 wire?
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Up to 600 MHz
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Define Terrestrial microwave
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These transmission systems transmit tightly focused beams of radio signals from one ground-based microwave transmission antenna to another.
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What are the disadvantages of terrestrial microwave transmissions?
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1. They don't go through solid objects like mountains or buildings. 2. They require line-of-sight access.
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What are the advantages of terrestrial microwave transmissions?
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The ability to transmit signals up to hunreds of miliions of bits per second without wires! No telephone service fees.
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What is satellite microwave transmission?
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The signals travel from a ground station on Earth to a satellite and back to another ground station.
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What does LEO stand for? What is the range of LEO? What is it used for?
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Low Earth Orbit. circles 100- 1000 miles above earth every 90 minutes. Used for e-mail, pagers, world-wide mobile phone, spying, remote sensing, video conferencing
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What does MEO stand for? What is the range of MEO? What is it used for?
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Middle Earth Orbit. 1000-22,300 miles above earth. Used for GPS, surface navigation.
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What does GEO stand for? What are it's characteristics?
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Geosynchronous Earth Orbit. Located 22,300 miles up, allowing it to remain stationary over one point on earth. High capacity, high quantity bulk transmissions
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What does HEO stand for and why is it used?
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Highly elliptical orbit. Used for spying and scientific observations.
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