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16 Cards in this Set
- Front
- Back
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Why is cable better than other wireless media options. |
Some cables support higher data transfer rates, and are more secure than wireless |
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What are the disadvantages of cable |
The disadvantage of cables is their physical presence. |
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When cables are installed, where they are installed? (Name Five) |
underground, undersea, utility tunnels; pole to pole, attics, basements, above ceiling tiles; inside walls, through walls, and around the interior of a room. |
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Three types of transmission cables are typically used to connect data communications devices: |
twisted pair copper cable, coaxial cable, and fiber-optic cable |
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What do twisted pair wires look like |
Pairs of twisted wires covered with an insulating layer, |
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what do twisted pair wires used for |
used for telephone and computer networks. |
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Describe a coaxial cable |
An inner conductor wire surrounded by insulation, a conductive shield, and a cover |
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what do coaxial cables used for |
cable TV and other applications. |
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What do fiber-optic look like? |
Consists of thousands of extremely thin strands of glass or plastic bound together in a sheathing |
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What is fiber-optic used for |
Used for backbones of telecom networks and in some local area networks. |
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What is Radio Spectrum |
all of the frequencies available for radio waves from about 10 KHz to 300 GHz and their assigned uses. |
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What larger spectrum is the radio spectrum part of? |
electromagnetic spectrum |
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What devices use radio waves? Name 5 |
television, wireless phones, wireless computer networks, Global Positioning Systems, ham radios, CB radios, police and emergency communications, satellite communications, and wireless clock systems |
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Waves sent at the high end of the radio spectrum, between 1 and 300 GHz, are called _____________ |
microwaves |
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What could microwave waves do besides cook your food? |
high-speed, high-capacity communication links and satellite communications. |
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What is higher than microwaves on the radio spectrum? |
infared light |
