Term
| What was the problem that bus and ring topology networks suffered from? (pg. 46) |
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Definition
The entire network stopped working if the cable broke at any point.
The broken ends on a bus network didn't have the required termination, which caused reflection between computers that were still connected. A break in a ring network broke the circuit and stopped data flow. |
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Term
Star topologies had a huge benefit over ring and bus topologies by offering ___.
How did it work? (pg. 46) |
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Definition
Fault tolerance
If a cable broke, all of the other computers could still communicate. |
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Term
| What is the difference between physical topology and signal/logical topology? (pg. 48) |
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Definition
| Physical topology is how the cables physically look, while logical topology refers to how the signals travel electronically. |
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Term
| A topology network where every computer connects to every other computer via two or more routes. (pg. 49) |
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Definition
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Term
| What are the two types of meshed topologies, and what is the primary difference between them? (pg. 49) |
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Definition
| A partially meshed topology network has at least two machines with redundant connections; every machine doesn't need a direct connection. Every computer connects directly to every other computer in a fully meshed topology network. |
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Term
| A ___ topology network used a single cable that connected all of the computes in a line. (pg. 44) |
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Definition
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Term
| A ___ topology network connected all computers on the network with a ring of cable. (pg. 44) |
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Definition
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Term
| A practical application of a topology and other critical tools that provides a method to get data from one computer to another on a network. (pg. 50) |
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Definition
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Term
| The most common form of cabling uses ___ wire wrapped up in some kind of protective sheathing. (pg. 50) |
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Definition
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Term
| A copper cable that contains a central conductor wire surrounded by an insulating material and braided metal shield that protects data transmissions from interference. (pg. 50) |
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Definition
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Term
| An electrical current that is generated along a metal wire when it encounters a magnetic field. (pg. 51) |
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Definition
| Electromagnetic interference (EMI) |
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Term
| What is the typical scenario for using coaxial cable today? (pg. 52) |
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Definition
| Connecting a computer to a cable modem to enable to it access the Internet. It's also used to connect TVs to cable boxes or satellite receivers. |
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Term
| Coaxial cables use an ___ connector that screws on, making for a secure connection. (pg. 52) |
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Definition
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Term
| What are the two types of coaxial cables that cable modems use, and what are they primarily used for? (pg. 52) |
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Definition
| RG-59 was used primarily for cable television rather than networking. It's thinness and the introduction of digital cable motivated the move to the more robust RG-6. |
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Term
| All coax cables have a ___ rating. The U.S. military developed these ratings to provide a quick reference for the different types of coax. |
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Definition
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Term
| The only important measure of coax cabling is its ___ rating, a relative measure of the resistance on the cable. (pg. 52) |
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Definition
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Term
| A coaxial cable that contains two central copper conductors wrapped around a single shield. (pg. 54) |
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Definition
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Term
| ___ cable is used as a substitute for short fiber connections like switches because it's substantially cheaper than fiber. Used this way, it's generally called ___. (pg. 54) |
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Definition
| Fiber, direct attached cable (DAC) |
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Term
| The most common type of cabling used in networks. (pg. 54) |
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Definition
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Term
| What are the two types of twisted pair cabling, and what is the benefit to each? (pg. 55) |
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Definition
| Shielded twisted pair (STP)'s shielding protects the wiring from EMI, but unshielded twisted pair (UTP) costs much less than STP but performs just as well in most environments. |
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Term
| A variety of grades developed by the cabling industry to help network installers choose the appropriate cable. (pg. 56) |
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Definition
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Term
| A cable's cat rating is officially measured in ___, indicating the highest frequency the cable can handle. (pg. 56) |
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Definition
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Term
| In measuring frequency, each cycle per second (or hertz) accounts for ___ bit of data per second. (pg. 57) |
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Definition
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Term
| The maximum amount of data that goes through the cable per second. (pg. 57) |
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Definition
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Term
| Telephones used ___ connectors, designed to support up to two pairs of UTP wires. Current wired networks use the four-pair ___ connectors. (pg. 58) |
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Definition
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Term
| Cable that transmits light rather than electricity, making it attractive for both high-EMI areas and long-distance transmissions. (pg. 59) |
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Definition
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Term
| Almost all network technologies that use fiber-optic cable require pairs of fiber (one for sending, one for receiving). What is this type of cabling called? (pg. 60) |
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Definition
| Duplex fiber-optic cabling |
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Term
| Network technologies that use fiber optics use ___ to send light signals. A fiber-optic cable that uses them is known as ___. (pg. 61) |
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Definition
| light-emitting diodes (LEDs), multimode fiber (MMF) |
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Term
| A fiber-optic cable that uses lasers is known as ___. (pg. 61) |
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Definition
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Term
| What advantage does using laser light and single-mode fiber-optic cables have to using multimode fiber-optics? (pg. 61) |
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Definition
| Using SMF prevents modal distortion (signals sent at the same time don't arrive at the same time). |
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Term
| What are the four main connector types for fiber-optic cables? (pg. 61-62) |
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Definition
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Term
| Ratings that define the risk of network cables burning and creating noxious fumes and smoke. (pg. 63) |
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Definition
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